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       The Apache Tomcat Connector - Miscellaneous Documentation

   Changelog

   Preface
     This is the Changelog for Tomcat Connectors. This changelog does not
     contain all updates and fixes to the Tomcat connectors (yet). It should
     contain fixes made only after November 10th 2004, when the new
     documentation project for JK was started.

   Changes between 1.2.30 and 1.2.31
     Native
       fix    49413: AJP13: Drop flush packets send by the backend after the
              response has been finished. (rjung)
       update AJP: Log the local and remote socket address. (mturk)
       update Watchdog: Move the maintain workers outside the critical
              section allowing other threads to use the connection pool
              during maintenance. (mturk)
       update Common: Add svn revision to init log message. (rjung)
       fix    Common: Don't destroy errno during trace logging. (rjung)
       update Apache: Add support for Apache 2.3/2.4. (rjung)
       update Apache: Added version number resource for mod_jk.so on
              Windows. (timw)
       update IIS: Added rotatelogs style log rotation to ISAPI Redirector.
              (timw)
       fix    38895: IIS: Use RAW headers instead of CGI headers by default
              to prevent conversion of underscores '_' to hyphens '-' in
              header names. Old behaviour can be enabled by defining
              USE_CGI_HEADERS. (timw)
       fix    49511: IIS: Do not override IIS log information when
              subsequent requests on a keep-alive connection are not mapped
              into the ISAPI Redirector. (timw)
       fix    Docs: Document SSLOptions needed for SSL information
              forwarding. (rjung)
       update Docs: Grammar and style improvements and clarification about
              serving static content by IIS. Patch provided by André
              Warnier. (rjung)
       fix    Docs: Update subversion paths used in docs. (rjung)

   Changes between 1.2.28 and 1.2.30
     Native
       update Apache: Improve compatibility with Apache 2.3. (rjung)
       fix    46632: Apache: Do not register child cleanup for our pools.
              (mturk)
       fix    46893: Apache: Log warning only if JkShmSize was actually set
              in the configuration. (mturk)
       update IIS: Include optional chunking support. Off by default.
              (mturk)
       fix    48763: IIS: Do not send Content-Length when using chunked
              encoding or length larger 4GB. (mturk)
       fix    48223: IIS: Propagate correct backend error code to IIS.
              (rjung)
       fix    47867: IIS: crash during startup, when compiled with VS2008
              and workers.properties contains unsupported properties. Patch
              provided by Indrek Juhani (rjung)
       fix    47628: IIS: Fix deadlock when restarting the Application Pool
              caused by not releasing the critical section lock. Patch
              provided by Bret Prucha. (mturk)
       fix    IIS/NSAPI: Correct log file flushing after each line. (mturk)
       add    NSAPI: Add Microsoft Visual C++ Makefile. (mturk)
       update AJP: Improve socket shutdown handling. (mturk)
       update AJP: Ensure we never reuse a non reusable socket. (mturk)
       update AJP: Tolerate a single excess packet when waiting for cpong.
              (mturk)
       update AJP: Check protocol correctness more strictly. (mturk)
       update 48410: AJP: Use poll instead select so we can work with more
              then 1024 sockets. (mturk)
       fix    46503: AJP/Status: Garbage data in worker domain and route.
              (mturk)
       fix    48276: AJP: When worker contact cannot be resolved mark the
              worker as disabled instead failing to start the server.
              (mturk)
       fix    48169: AJP: Improve CGI interoperability by closing all
              sockets during EXEC. (mturk)
       add    Status: Add number of open backend connections to status
              worker. This feature is experimental, the displayed value
              might not be accurate. (mturk)
       update 47224: Status: When address gets changed invalidate all opened
              sockets in the endpoint cache. This will cause new backend
              connections to get opened using new address. (mturk)
       fix    48305: Status: Do not show "secret" property when doing dump.
              (mturk)
       fix    45610: Status: Don't accept requests with empty value for sub
              worker parameter. (rjung)
       fix    45610: Status: Fix erroneous unsetting of sticky_session and
              sticky_session_force when updating other load balancer
              attributes via the status worker. (rjung)
       fix    47222: Status: Add ping_timeout to the shared memory and allow
              dynamic configuration. (mturk)
       fix    Status: Remove duplicate "errors" line in property view of
              AJP13 workers that are part of a load balancer. (rjung)
       fix    LB: Fix route logging. (rjung)
       update Logging: Automatically detect size of thread id for logging.
              (rjung)
       update Logging: Add optional log file locking for Windows when
              defining JK_LOG_LOCKING. (mturk)
       update Configuration: Update example configuration. (rjung)
       update Docs: Update information about tools needed to create a
              release. (rjung)
       fix    47983: Docs: Fix typo in example config which breaks startup.
              (rjung)
       update Build: Force copy of automake files. (rjung)
       update Build: Tomcat code repository structure cleanup reflected in
              documentation and build script. (rjung, mturk)

   Changes between 1.2.27 and 1.2.28
     Native
       add    Apache: Add more environment variables to overwrite request
              information. Useful in case a proxy is in front of Apache and
              sends us original request information e.g. via custom headers.
              (rjung)
       update Apache: No longer preallocate entries for JK request log.
              (rjung)
       fix    46352: Apache: Fix crash when using SetHandler jakarta-servlet
              in VHost without any JkMount. Crash due to incorrect
              initialization of mount extensions. (rjung)
       fix    Apache: JkWatchdogInterval had wrong interval calculation
              causing a 10 times higher watchdog interval then configured.
              (mturk)
       fix    Apache: Activate forwarding of SSL key size by default.
              (rjung)
       fix    46169: Apache 1.3: Backport use_server_errors mount extension.
              (rjung)
       fix    46763: Apache 2.0: Survive the log mutex during graceful
              restart. Patch provided by Eiji Takahashi. (mturk)
       fix    46416: Apache 2.0 on Windows: Include mstcipip.h even if the
              apr doesn't include it. (mturk)
       update IIS: Update uriworkermap.properties file on a regular
              interval. This requires both worker_mount_reload and
              watchdog_interval to be defined. (mturk)
       update IIS: Remove obsolete entries from registry file. (mturk)
       fix    46579: IIS: Use local environment table instead environment
              variables for setting the JKISAPI_PATH and JKISAPI_NAME.
              (mturk)
       update LB: Add new property error_escalation_time to fine tune
              escalation of local errors to global errors. (rjung)
       update LB: If the sticky session affinity mark contains a dot, treat
              the part before the dot as the domain name. This allows to
              have full node session affinity with domain failover. (mturk)
       fix    LB: make forced recovery work with local error states. (rjung)
       fix    LB: Only update error state and error time, if we actually
              have a new state. (rjung)
       fix    LB: Set global worker state to error when we reach
              max_reply_timeouts, or fail_on_status triggered hard error.
              (rjung)
       update AJP: Add a new error type JK_AJP_PROTOCOL_ERROR. (mturk)
       update AJP: Allow worker ports lower or equal to 1024. (rjung)
       update AJP: Improve some AJP error log messages. (mturk)
       update Status: Allow changing worker address and port of AJP workers.
              The address is resolved on next request for that worker.
              (mturk)
       update Status: Allow update actions to show error messages in the
              result page. (rjung)
       update Status: Refactor update actions. (rjung)
       update Status: Do not redirect to the show or list page, if an error
              occured during an action. (rjung)
       update Status: Include error time in display. (rjung)
       update Status: Remove redundant port information from worker display.
              Rename address column and remove its explanation from the
              legend. (rjung)
       update Status: Optimize forced uriworkermap.properties reload.
              (mturk)
       fix    Status: Fix crash in text display. (rjung)
       fix    Status: Show - Edit - Show always ends in single lb member
              show, even when started from all members lb show. (rjung)
       fix    Status: Wildcards in sub worker names were broken for update
              actions. (rjung)
       fix    Status: Add use_server_errors to map display. (rjung)
       update SHM: Move locking into the data pull and push methods. (rjung)
       update JNI: Deprecate JNI workers. (rjung)
       fix    Netware: Missing define for MAX_PATH. Patch by Guenter Knauf.
              (rjung)
       update Docs: Add a new HowTo page about reverse proxies. (rjung)
       update Docs: Add an explanation of local error states to the timeouts
              documentation. (rjung)
       update Docs: Clarify relation between socket_timeout and
              socket_connect_timeout. (rjung)
       update Docs: Clarify IIS URL rewrite feature. (rjung)
       fix    46834,46734: Docs: Fix a couple of missing or broken links.
              (markt,rjung)
       fix    Docs: Add 2008 news to main page and menues. (mturk, rjung)

   Changes between 1.2.26 and 1.2.27
     Native
       fix    46109: Decay reply_timeouts even when lb method is busyness.
              Also reset reply_timeouts during forced recovery. (rjung)
       update AJP13: Recycle connection if previous request didn't complete.
              (mturk)
       update Maintain should not run multiple times in parallel. (mturk)
       fix    Apache: Fix small memory leak during restart. (mturk)
       update Improve signal handling during socket shutdown. (mturk)
       add    URI Map: Add debug dump function for uri worker map. (rjung)
       update Add revision number to version info for non-release builds.
              (rjung)
       add    IIS: Optionally allow chunked encoding for responses. At the
              moment only usable, if build with ISAPI_ALLOW_CHUNKING
              defined. Based on patch by Tim Whittington. (rjung)
       update IIS: Optionally use raw headers instead of CGI headers. Fixes
              problem "underscore=dash" problem in header names. At the
              moment only available, if build with USE_RAW_HEADERS defined.
              (rjung)
       update IIS: Optionally improve IIS 5.1 compatibility. At the moment
              only available, if build with AUTOMATIC_AUTH_NOTIFICATION
              defined. Based on patch by Tim Whittington. (rjung)
       fix    IIS: Fix memory corruption due to parallel initialization by
              multiple threads. (rjung)
       update Windows: Use non-default socket keepalive interval. (mturk)
       add    IIS: Add environment variables JKISAPI_PATH and JKISAPI_NAME.
              (mturk)
       add    Added socket_connect_timeout directive for setting the connect
              timeout for the socket. This enables to have low connection
              timeout but higher operational timeouts. (mturk)
       fix    AJP13: [CVE-2008-5519] Always send initial POST packet even if
              the client disconnected after sending request but before
              providing POST data. In that case or in case the client broke
              the connection in a middle of read send an zero size packet
              informing container about broken client connection. (mturk)
       add    AJP13: Added connection_acquire_timeout directive for setting
              the absolute timeout the worker will wait for a free endpoint.
              (mturk)
       update Apache: Allow to set path parameter used when doing
              JkStripSession. (mturk)
       update Refactor retries implementation and change semantics of
              retries attributes. (mturk)
       update Status: Allow showing only a single member for a load
              balancer. (rjung)
       update Status: Add display of seconds since last statistics reset and
              access and transfer rates. (rjung)
       add    AJP13: Add a configurable retry_interval time. (rjung)
       update Documentation: Enhance description of connection_pool_size.
              (rjung)
       update IIS: Refactor error page generation. (mturk)
       fix    IIS: SERVER_NAME variable can be the same for multiple
              different server instances if requests are handled according
              to the ip:port combination. Use INSTANCE_ID variable to which
              the request belongs instead. (mturk)
       add    Allow forwarding server error pages. This can be done on
              per-uri basis using new use_server_errors extension. (mturk)
       add    Added session_cookie and session_path for configuring default
              session identifiers. (mturk)
       update Use max_packet_size also as TCP send and receive buffer size.
              (mturk)
       update Apache: Do not allow Apache to start in multi-threaded mode if
              mod_jk was only build for single threaded server (prefork).
              (mturk)
       fix    45812: Add done() service method that causes sending EOS
              bucket for Apache httpd 2.x. This allows filter chain to work
              properly. (mturk)
       add    Added connection_ping_interval, ping_timeout and ping_mode
              directives. (mturk)
       fix    Apache: Use correct ld flags provided by apxs when building
              module. Prevents some crashes on AIX for httpd 1.3 module.
              (rjung)
       fix    Documentation: "val" attribute numbering in status worker
              needs to start with 0 instead of 1. (rjung)
       update Documentation: Remove JNI parameters from sample configuration
              in the workers generic howto. (rjung)
       fix    45026: For Apache httpd 2.x add "Unknown Reason" as the reason
              phrase, if we get an empty one from the backend. Otherwise
              httpd 2.x returns status 500. (rjung)
       fix    Build: Fix Cygwin build. (rjung)
       update Documentation: Add info to docs, that variables sent via
              JkEnvVar are not listed in request.getAttributeNames().
              (rjung)
       add    Add watchdog background thread for Apache 2.x and IIS doing
              internal maintenance (idle connection checks, backend
              probing). See JkWatchdogInternal (Apache) and
              watchdog_interval (IIS). (mturk)
       update Change log level of some messages from error to info. (mturk)
       fix    Documentation: Fix docs for worker attribute "secret". (rjung)
       update Detect correct plugin name for various web servers via
              additional preprocessor defines. (rjung)
       fix    LB: Do not put loadbalancer node in error state if there is
              opened channel. This fixes the bug when new connection fails
              due to busyness, causing opened connections fail stickyness.
              This brings back per-node busy counter and private state array
              for each request. We can mark the state as error for failover
              to work while still operating and reporting node as OK if
              there are opened working connections. (mturk)
       fix    44738: Fix merging of JkOption ForwardURI* between virtual
              hosts. Patch contributed by Toshihiro Sasajima. (rjung)
       add    URI Map: Add extension attributes to uri worker map. Allowed
              are reply_timeout, active/disabled/stopped and fail_on_status.
              Usage currently only implemented for httpd and IIS.
              (rjung+mturk)
       fix    URI Map: Make dynamic reloading atomic and free memory not
              needed any longer. (rjung)
       add    Configure: Don't use post httpd 2.2.0 API functions when
              building with new --enable-api-compatibility configure switch.
              (rjung)
       fix    Apache: JkAutoAlias does not work in combination with
              JkMountCopy if there are no JkMount in virtual host. (rjung)
       update LB: Optimize state macros to improve performance. (rjung)
       add    Apache: Allow dynamic setting of reply timeout using the
              environment variable JK_REPLY_TIMEOUT. (rjung)
       add    Status: Add manageability for ajp parameters of ajp workers
              and ajp lb members. (rjung)
       update Status: Change parameter names of update action to make them
              more easily distinguishable from other parameters. (rjung)
       add    Status: Add ajp worker statistics also for workers, that are
              not lb members. (rjung)
       update AJP: Refactor factories, move ajp13/ajp14 common parts into
              ajp_factory. (rjung)
       update Status: Only sync shm worker config values of the workers for
              which we changed values. (rjung)
       fix    Status: Set lb_factor instead of distance. (rjung)
       update Status: Minor layout changes, use drop down instead of
              multiple text links. (rjung)
       update SHM: Use local copies of read mostly attributes of lb sub
              workers in lb and status worker. (rjung)
       update Status: Add "dump" action to dump our initial configuration.
              (rjung)
       update Status: Use property table to decide which cmd action uses
              which output elements. (rjung)
       update Common: Include original configuration map in worker_env to
              make it available for workers, e.g. the status worker. (rjung)
       update LB: Refactor "route" return for httpd note. Don't use a member
              of the worker_record, because that's not thread safe. (rjung)
       update Common: Refactor "retries", remove from service and jk_worker,
              move into ajp worker instead. (rjung)
       update SHM: Use distinct structs for lb and ajp13 in shm. Improves
              type safety and saves a few bytes. (rjung)
       update SHM: Remove unused attributes. (rjung)
       update SHM: Automatically determine shm size for all web servers.
              (rjung)
       update SHM: Make open/attach logging consistent for all web servers.
              (rjung)
       update Status: Include server local time in output. (rjung)
       fix    44116: Fix handling of multiple JSESSIONID cookies. (rjung)
       fix    37850: Use thread safe localtime_r where appropriate. (rjung)
       fix    Use thread safe strtok_r on more platforms, especially AIX.
              (rjung)
       update Status: Improve XSS hardening. (rjung)
       update 35303: Move initialization of service members with defaults
              from web server specific code to our generic
              jk_init_ws_service() function. (rjung)
       fix    36385: Add missing prepost CPing/CPong directly after connect
              in case prepost CPing is used, but no connect CPing. (rjung)
       update 37322: Apache: Enhance robustness of message formating in
              jk_error_exit(). (rjung)
       fix    44147: Multiple load balancing workers problem. (rjung)

   Changes between 1.2.25 and 1.2.26
     Native
       fix    42003: Allocate memory instead using fixed size from the
              stack. (mturk)
       fix    43229: Load balancer does not do fail over after reply
              timeouts. (rjung)
       fix    JKStatus: Repair detailed Apache httpd version display. This
              was broken for httpd version 2.2.4+. (rjung)
       update LB/AJP: Refactoring of jk_connect.c, jk_ajp_common.c,
              jk_lb_worker.c (rjung)
       fix    Configure: Repair broken apxs auto-detection. (rjung)
       update Configure: Remove trace logging from compiled code via new
              --disable-trace configure switch. (rjung)
       update Common: Maintain idle connections in decreasing (LRU) slot
              order. (rjung)
       update Apache: Create JK_WORKER_ROUTE and JK_REQUEST_DURATION notes
              for access log even if no JkRequestLogFormat is set. (rjung)
       update JKStatus: Enhance URI to worker map listing for Apache httpd.
              We now list maps for all virtual servers and not only the one,
              in which JKStatus itself was called. (rjung)
       update JKStatus: Enhance URI to worker map listing. Update stale
              uriworkermap.properties immediately. (rjung)
       fix    43873: Fix small memory leak occuring during httpd restart.
              (rjung)
       update Common: Allow '*' for the worker name in exclusion rules
              (resp. JkUnMount) which will override all workers. (rjung)
       fix    42038: Correct overlay of mounts and unmounts for IIS. (rjung)
       fix    43684: Replace JkMountFile by JkMountFileReload in
              uriworkermap.properties docs. (rjung)
       update Apache: Add new value "All" for JkMountCopy. (rjung)
       fix    43516: Memory leak for Apache httpd module of size 8KB for
              every virtual host without JK directive after each restart.
              (rjung)
       update Apache: Cleanup init and destroy of server configuration.
              (rjung)
       update Apache: Remove global configuration items from per server
              configuration. (rjung)
       update Apache: Remove unused attributes secret_key and
              automount/JkAutoMount. (rjung)
       update Cleanup of jk_uri_worker_map. (rjung)
       update Documentation: Small additions to JkShmFile documentation.
              Contributed by Gerhardus Geldenhuis. (rjung)
       fix    AJP13: Ignore flush packets before we received the response
              headers. (rjung)
       fix    Fix crash during startup when using worker configuration
              inheritance (attribute "reference") and log level debug.
              (rjung)
       fix    AJP13: Match header names exactly against pre defined
              constants. Avoid possible confusion with custom header names
              using a standard header name as a prefix. (rjung)
       fix    jkstatus: Fix correct parameter validation at
              JkStatusUpdateTask and JkStatusUpdateLoadbalancerTask ant
              tasks. Reported by Christian Mittendorf. (pero)

   Changes between 1.2.24 and 1.2.25
     Native
       update IIS: Fix shm shutdown behaviour. (rjung)
       update General: fail_on_status used in a load balancer can optionally
              do fail over without putting the failed worker in error state.
              (rjung)
       update NSAPI: Improve build description for Unix. (rjung)
       update NSAPI: Add initialization startup message containing JK
              version. (rjung)
       fix    General: Declare static functions as static. (jim)
       update Documentation: Clarify fail_on_status behaviour. (rjung)
       fix    General: Do fail_on_status before returning the response
              headers. (rjung)
       update NSAPI: Fix shm shutdown behaviour. (rjung)
       update NSAPI: Set return status even if request ended with an error.
              (rjung)
       update NSAPI: Allow using without shm_file on WIN32 and Netware.
              (rjung)
       fix    NSAPI: Fix Crash of nsapi for log level debug and unset
              refect_unsafe. (rjung)
       update NSAPI: Improve Solaris and Linux Makefiles for nsapi build.
              (rjung)
       fix    Build: Improve pid_t type detection during configure on
              Solaris. (rjung)
       update Build: Experimental build support for gcc on WIN32 and
              Netware. (fuankg)
       update Build: Makefile optimizations for Apache httpd 1.3/Netware .
              (fuankg)
       fix    General: Fix missing flush bug introduced in 1.2.24. (rjung)

   Changes between 1.2.23 and 1.2.24
     Native
       update Documentation: Improved workers.properties description in the
              reference guide. (rjung)
       update Documentation: Add a HowTo about the various timeouts. rjung)
       update Logging: add milliseconds to the default timestamp format, if
              we have gettimeofday(). (rjung)
       update Apache: add milliseconds (%Q) and microseconds (%q) as
              possible JkLogStampFormat conversion specifiers. This does not
              use strftime(), but needs gettimeofday(). (rjung)
       update IIS & Sun: Log service failures also, if return code is
              negative. (rjung)
       fix    42849: Abort startup of Apache httpd 1.3 in case mod_jk
              initialization failed. We already do the same for Apache httpd
              2.x. (rjung)
       fix    42849: Refuse to operate with IIS in case the initialization
              failed. Instead requesting isapi_redirect.dll 500 will be
              returned to the user. This is as closest as it can get to
              Apache Httpd where we refuse to start the server in case of
              fatal initialization errors. (mturk)
       fix    Load Balancer: Fix a deadlock in lb worker, which was exposed
              on Solaris for threaded Apache MPMs. (rjung)
       update Logging: handle LWP IDs as 32 Bit unsigned. Try to make it
              work, although pthread IDs are opaque. (rjung)
       update JkStatus: Added manipulation of max_reply_timeouts. (rjung)
       update LB, Status: Add feature max_reply_timeouts, to make lb
              tolerant against occasional long running requests. (rjung)
       update JkStatus: Added OK/IDLE as the successor of N/A. (rjung)
       update Status worker: Renamed runtime states. All states have a major
              state (OK or ERR) and a substate. Changed the name N/A to
              OK/IDLE. Added docs about the meaning of the states to the
              status worker page in the reference guide. No new states have
              been added to code. (rjung)
       update Common: Add recovery options for recovering idempotent http
              methods HEAD and GET. (rjung)
       fix    Correct documentation for worker attributes retries and
              recovery_options. (rjung)
       fix    Make writing log lines and line endings more atomic. (rjung)
       update Common: Refactored and unified jk_map_read_prop* and
              jk_map_load_prop* for all use cases. (rjung)
       update Common/Apache/IIS/Netscape: Add an option to check decoded
              URLs for potentially malicious constructions. (rjung)
       update IIS: Document auth_complete and uri_select. (rjung)
       update Apache/IIS/Netscape: Change the default forwarding encoding to
              the new proxy method. (jfclere, rjung)
       update Common: Optionally reencode URIs before forwarding to the
              backend. Based on the URI reencoding done bei httpd mod_proxy.
              (jfclere, rjung)
       update Common: auto-detect correct print format for pid_t. This fixes
              at least compiler warnings on Solaris. (rjung)
       fix    42608: Handle Content-length as unsigned 64Bit to allow for
              huge up- and downloads. (rjung)
       update Apache: Add forwarding uri to debug log. (rjung)
       update Docs: Clarify relation between worker names and jvmRoute for
              load balancing. (rjung)
       fix    Use initial zero timeout for jk_is_socket_connected. The
              resulting detection is the same but offers a huge performance
              increase with mod_jk. In most cases the Operating System does
              not favor the 1 microsecond timeout, but it rather rounds that
              up to much higher value (frequency of interrupt timer which on
              most systems defaults to 100Hz). Patch provided by David
              McLaughlin. (mturk)
       update NSAPI: Check correct log file and shm file configuration
              during startup. (rjung)
       fix    NSAPI: Add support for the general options concerning retries,
              flushing and connection persistance. (rjung)
       fix    NSAPI: fix crashes due to use of mount attribute in
              workers.properties. Changed initialization order. (rjung)
       fix    Improved handling of libtool and discrepancies between CC env
              variable and CC used during apache build by configure script.
              (rjung)
       fix    Always build with thread support, unless flag --enable-prefork
              is set during for configure. (rjung)
       update Use snprintf/vsnprintf from ap_snprintf.c for platforms other
              than Windows, which might lack snprintf/vsnprintf
              implementations when NOT build for Apache httpd 2.x/APR (e.g.
              Sub Web Server) or without using configure. (fuankg)
       update Imported ap_snprintf() from Apache 1.3. (fuankg)
       fix    Fix incorrect log object cleanup during statup, leading to
              crashes at least on iSeries. (rjung)
       update Add jk_stat() and jk_file_exists() as wrapper functions. i5/OS
              V5R4 expects filename in ASCII for fopen but requires them in
              EBCDIC for stat(). (hgomez)
       update i5/OS (AS/400) V5R4 port where Apache 2.0 modules should now
              use UTF8. (hgomez)
       update Docs: Add comments on i5/OS build for V5R4 and previous
              releases. (hgomez)

   Changes between 1.2.22 and 1.2.23
     Native
       update [CVE-2007-0450] and [CVE-2007-1860]: Change the default value
              of JkOptions to ForwardURICompatUnparsed. The old default
              value was ForwardURICompat. This should make URL
              interpretation between Apache httpd and Tomcat consistent
              (prevent double decoding problems). (rjung)

   Changes between 1.2.21 and 1.2.22
     Native
       fix    Refactor line endings logging to make it correct for all
              platforms and webservers. (mturk)
       update Added command line windows make files. (mturk)
       update Allow fail_on_status directive to be multi line. (mturk)
       fix    42076: Fix name of new option from ForwardCertChain to
              ForwardSSLCertChain as documented. (rjung)
       fix    Docs: Fix a couple of typos, change format of a few tables,
              fix links to news pages. (rjung)
       fix    Fix correct URL for TC 6 examples in new IIS
              rewrite.properties configuration example file. (rjung)
       fix    Add svn properties to several files. (rjung)
       update Add TC 6 examples to uriworkermap.properties in config
              examples. (rjung)
       update Allow multiple status codes for fail_on_status directive. The
              status codes can be delimited by space or comma characters.
              (mturk)
       update IIS. Added pcre like regular expressions for url rewrite
              rules. (mturk)
       fix    41922: Apache 1.3. Enable JkEnvVar. (mturk)
       update Apache. Add --enable-flock configure parameter for explicit
              compilation of faster flock() system calls for OS supporting
              those calls. By default the fcntl system call for locking will
              be used that is a little bit slower but it can work on NFS
              mounted volumes as well. (mturk)
       fix    41562: Add Debug logging for read from client in ISAPI
              Redirector. Contributed by Tim Whittington. (mturk)
       update Apache. Add ForwardSSLCertChain JkOption. Contributed by
              Patrik Schnellmann. (mturk)
       fix    IIS. Do not forbid access to web-inf or meta-inf if there is
              no mapped worker. This allows to have resource with those
              names that are outside mapped contexts. (mturk)
       update Apache. Use process id for creating shared memory name and
              delete shared memory and shared memory lock files on exit.
              (mturk)
       fix    IIS. Fix Keep-Alive regression introduced in 1.2.21. (mturk)
       update Delete unused check for empty init_map during startup. (rjung)
       fix    41770: Fix startup error if no JkWorkersFile is used. (rjung)
       update Use JK_TRUE/JK_FALSE instead of OK/!OK as return values in
              init_jk(). (rjung)
       update Minor adjustments to apache startup log messages (when to use
              STDERR, remove deprecated NOERRNO flag, shm warning and
              warnings for usage of default files). (rjung)
       update Replace APR precompiler directive by httpd mpm_query to detect
              MPM threading. Add a debug log message about auto-detected
              pool size. (rjung)
       fix    Make MMN check easier to understand and a little more precise
              (for new ap_get_server_banner()/ap_get_server_description()).
              We use the new API only for Apache httpd 2.3. This way our
              binaries are not tightly coupled to a minor 2.0 version, and
              we don't use ap_get_server_banner() any way. (rjung)
       fix    Use the full description string ap_get_server_description()
              instead of the truncated info from ap_get_server_banner(),
              because this info gets used internally (status worker display
              and ajp14 backend communication) and is not send back to the
              normal user. (rjung)
       fix    41757: Document the "--enable-prefork" flag of configure.
              (rjung)
       update Enhance log messages for failures when parsing attribute maps.
              (rjung)
       fix    Correct log message during worker initialization, in case
              remote host could not be resolved. We logged the default host
              name "localhost" instead of the configured one. (rjung)
       fix    41770: Fix the second part of the bug: local_worker and
              local_worker_only is missing from the list of deprecated
              attributes (and not supported either), so prevents the web
              server from startup. (rjung)

   Changes between 1.2.20 and 1.2.21
     Native
       fix [CVE-2007-0774]: A denial of service and critical remote code
           execution vulnerability. Caused by buffer overflow in
           map_uri_to_worker() when URL were longer that 4095 bytes.
           Reported by ZDI (www.zerodayintiative.com). Please note this
           issue only affected versions 1.2.19 and 1.2.20 of the Apache
           Tomcat JK Web Server Connector and not previous versions. Tomcat
           5.5.20 and Tomcat 4.1.34 included a vulnerable version in their
           source packages. Other versions of Tomcat were not affected.
       add Check the worker. parameters and don't start if the parameter is
           not a valid one. (jfclere)
       add 41439: Allow session IDs to get stripped off URLs of static
           content in Apache by adding JkStripSession directive
           (configurable per vhost). (mturk)
       add Change semantics of empty defaults for JkEnvVar variables. Until
           1.2.19: not allowed. In 1.2.20: send variables as empty strings,
           if neither set to non empty in config, nor during runtime.
           Starting with 1.2.21: If config has no second argument only send
           variable if set (even when set to empty string) during runtime.
           Allows good combination with condition attribute in tomcat access
           log. (rjung)
       fix 41610: Fix incorrect detection of missing Content-Length header
           leading to duplicate headers. Contributed by Boris Maras. (rjung)
       fix Better build support for SunONE (Netscape/iPlanet) webservers.
           (jim)
       add Add warning if duplicate map keys are read and are not allowed,
           e.g. when parsing uriworkermap.properties. (rjung)
       fix Don't concat worker names, if uriworkermap.properties has a
           duplicate pattern, instead overwrite the worker. (rjung)
       fix Log deprecation message even in duplication case. (rjung)
       fix uriworkermap.properties: Fix off-by-one problem when deleting URL
           mapping during reloading of uriworkermap.properties. (rjung)
       add 41439: Allow session IDs to get stripped off URLs of static
           content in IIS (configurable). (rjung)
       add 41333: Refactoring isapi_plugin configuration reading. (rjung)
       add 41332: Add some more errno logging and unify the format. (rjung)
       add JkStatus: Improved logging by adding status worker name to
           messages. Added messages to the recover worker action. (rjung)
       add JkStatus: Refactoring searching for workers and sub workers.
           (rjung)
       add 41318: Add configuration to make status worker user name checks
           case insensitive. (rjung)
       add JkStatus: Add estimated time until next global maintenance to
           other mime types and adopt jkstatus ant task. (rjung)
       add JkStatus: Show estimated time until next global maintenance.
           Change displayed time until next recovery to a min/max pair.
           (rjung)
       add JkStatus: Allow a user of a read/write status worker to switch it
           to and from read_only mode temporarily. (rjung)
       fix JkStatus: Do not show read/write commands in a read_only status
           worker. (rjung)
       add JkStatus: Allow lb sub workers in error state to be marked for
           recovery administratively from the status worker. (rjung)
       add Load Balancer: Do not try to recover multiple times in parallel.
           Use additional runtime states "PROBE" and "FORCED". (rjung)
       fix JkStatus: Improve data synchronization between different
           processes. (rjung)
       fix 41381: Fix segfault in feature fail_on_status (wrong order of log
           arguments). Patch by Juri Haberland. (rjung)
       fix Use correct windows line endings for log file on WIN32 platform.
           (rjung)

   Changes between 1.2.19 and 1.2.20
     Native
       add    JkStatus Ant Task documentation page. (pero/rjung)
       add    JkStatus Ant Tasks: Add new tasks for update and reset. (pero)
       update JkStatus Ant Tasks: Update for new xml status format. (pero)
       update Allow integer and string values when setting
              enumeration/boolean attributes via status worker update
              action. (rjung)
       add    Docs: New reference guide page for status worker. (rjung)
       update Docs: Renaming the config dir to reference and using the title
              Reference Guide in the docs. (rjung)
       update Added retry_on_status for workers directive. (mturk)
       update Status Worker: Add directive to make property prefix and
              good/bad rule configurable. (rjung)
       update Status Worker: Omit lb members when att=nosw. (rjung)
       update Status Worker: New command cmd=version for a short version
              output. (rjung)
       update Status Worker: New output stype mime=prop produces property
              lists. (rjung)
       fix    Apache: Fix incorrect handling of JkEnvVar when Vars are set
              multiple times. (rjung)
       update Renamed jvm_route to route. Deprecated jvm_route, but still
              use it as fallback when parsing the worker configuration.
              (rjung)
       update IIS: Make uriworkermap file reload check interval
              configurable. (mturk)
       update Apache: Make uriworkermap file reload check interval
              configurable. (rjung)
       update Status Worker: Add directives for customizing the XML output
              (ns, xmlns, doctype). (mturk)
       add    Docs: New page with description of uriworkermap. (rjung)
       update Docs: Added short description of max_packet_size to worker
              reference. (rjung)
       update Status Worker: All functions accessible also for xml and txt
              mime types (list, show, update, reset). (rjung)
       update Status Worker: New global health indicators for load balancers
              named bad (error, recovering or stopped), degraded (busy or
              disabled) and good (the rest, active and OK or N/A). (rjung)
       update Status Worker: New edit page, to change one attribute for all
              members of a load balancer. (rjung)
       update Status Worker: Standard logging for status worker. (rjung)
       update Status Worker: code refactoring. (rjung)
       update Status Worker: New attribute user (list) denies access, if the
              request user in the sense of remote_user is not in this list.
              Empty list = no deny (rjung)
       update Status Worker: New attribute read_only disables the parts of
              the status worker, that change states and configurations.
              (rjung)
       fix    36121: Don't change main uri when mod_jk serves included uri.
              (markt)
       update Apache VHosts: Merge JkOptions +base - -base + +vhost -
              -vhost. (rjung)
       update Apache Docs: Adding requirements, context information, default
              values and inheritance rules to the Apache config
              documentation. (rjung)
       update Status Worker: Add source type to status worker, remove the
              redundant "context" column in the map listing (context=uri).
              (rjung)
       update uriworkermap: On reload of the file, all old entries from the
              previous file version get deleted, before the new ones are
              being read. (rjung)
       fix    Keep normal maps and exclusion maps internally separate. Don't
              treat them as the same when adding a rule. (rjung)
       update Status Worker: Display mapping rules also for non-lb workers
              and in global view. (rjung)
       update Apache VHosts: Use the vhost log files instead of the main
              log. (rjung)
       update Apache VHosts: Allow individual timestamp formats by
              refactoring the formatting method. (rjung)
       update Apache VHosts: Adding all missing config items to the virtual
              host level. Don't overwrite the settings from the global
              server, but inherit them in case they are not set in the
              virtual host. (rjung)
       update Apache: remove unnecessary function names from log messages.
              (rjung)
       update Apache: add a default log file location and a message, if the
              default gets used. (rjung)
       update Apache: add missing JK_IS_DEBUG_LEVEL() (rjung)
       update Apache VHosts: Allow JkWorkersFile, JKWorkerProperty,
              JkShmFile and JkShmFileSize only in global virtual server.
              (rjung)
       update Add some more jk_close_socket() and reduce log level for some
              info messages. (rjung)
       update Load Balancer: Added the Sessions strategy. Contributed by
              Takayuki Kaneko. (rjung)
       update Docs: Minor enhancements and syncing with more recent
              versions. (rjung)
       fix    40997: Separate uri mappings from their '!' counterpart when
              checking for duplicates in uriworkermap reloading. (rjung)
       fix    40877: Make sure the shared memory is reset on attach for
              multiple web server child processes. (mturk)
       update IIS: Added shm_size property to be able to deal with over 64
              workers configurations. (mturk)
       update IIS: Increase default thread count to 250, so its the same as
              Apache Httpd default configuration. (mturk)
       fix    40966: Fix socket descriptor checks on windows. (mturk)
       fix    40965: Initialize missing service parameters. (mturk)
       fix    40938: Fix releasing of rewrite map. Thanks to Chris Adams for
              spotting that. (mturk)
       update Apache: Added +FlushHeader JkOptions. (mturk)
       update Added explicit flush when AJP body packet size is zero.
              (mturk)
       fix    40856: Fixing case sensitivity bug in URL mapping. (rjung)
       fix    40793: Documentation: Improvements to Apache HowTo provided by
              Paul Charles Leddy. (markt)
       fix    40774: Fixing wrong recursion termination. This one restricted
              the "reference" feature unintentionally to 20 workers. (rjung)
       fix    40716: Adding "reference" feature to IIS and Netscape. (rjung)
       fix    Documentation: Corrected SetEnvIf syntax in JK_WORKER_NAME
              example. (rjung)
       fix    Documentation: Added forgotten STATE and ACTIVATION notes for
              load balancer logging in Apache. (rjung)
       update Apache: Use instdso.sh instead libtool: libtool does not work
              on HP-UX for example. (jfclere)

   Changes between 1.2.18 and 1.2.19
     Native
       update Docs: Add SetHandler and new env var to Apache config docs.
              (rjung)
       update Apache 1.3: Backport "no-jk" feature. (rjung)
       update Apache: Add an environment variable to make SetHandler
              "jakarta-servlet" more useful. The variable is JK_WORKER_NAME,
              but can be changed by the new directive JkWorkerIndicator.
              (rjung)
       fix    LB: Don't use single worker shortcut, if the single worker is
              being diabled. (rjung)
       fix    Status worker: Add short explanation of activation and error
              states to legend. (rjung)
       fix    Docs: Add meaning of zero timeout values for various timeouts
              in workers.properties. (rjung)
       fix    LB: Cleanup of Mladens forced recovery. (rjung)
       fix    LB: Do not change lb_value for recovering workers to max, if
              we are using BUSYNESS method. (rjung)
       fix    Apache: Since 1.2.14 mod_jk failed to detect client abort.
              (rjung)
       fix    Docs: Corrected description of JkEnvVar. (rjung)
       fix    Solaris: Detect filio.h in configure to make the new
              connection detection build on solaris (r432825). (rjung)
       update Add feature to force the recovery of workers that are member
              of loadbalancer if all the members are in error state. This
              fixes the time gap where 503 was returned caused by
              recovery_timeout although the backend was ready to handle the
              requests. (mturk)
       update Docs: Seperate deprecated directives in their own table.
              (rjung)
       update Docs: Allow "-" and "_" in worker names. (rjung)
       update Allow multiple lines with attributes "balance_workers" and
              "mount". (rjung)
       fix    Make jk_is_some_property match more precisely. (rjung)
       update JkStatus: Make refresh interval changeable. (rjung)
       fix    JkStatus: Adjust display of recover time wrt. global
              maintenance. (rjung)
       update LB: Resetting worker state from OK to NA, if worker has been
              idle too long. (rjung)
       fix    Avoid compiler warnings concerning the use of lb_*_type
              arrays. Use functions instead. (rjung)
       update Added %R JkRequestLogFormat option for Apache 1 and Apache 2.
              (mturk)
       update Allow changing jvm Route from status manager. (mturk)
       fix    Do not retun 400 if Tomcat fails in the midle of the post
              request. Return 500 insted. (mturk)
       update LB: Combine ok/error/recovering/busy runtime states into a
              single scalar. (rjung)
       update LB: Combine active/disabled/stopped configuration states into
              a single scalar. (rjung)
       update LB: Add several Apache notes to enable standard logging for
              load balancer results. (rjung)
       update LB: Reorganisation of the main load balancer service loop.
              (rjung)
       update Implement hierarchical worker configuration via attribute
              "reference". (rjung)
       update Log deprecated properties. (rjung)
       fix    IIS: Fix simple_rewrite for the cases where the rewritten url
              is larger then the original one. (mturk)
       update New JkOption "DisableReuse" to disable connection persistence.
              (jim)
       update LB: Move sessionid retrieval out of get_most_suitable_worker
              into service. (rjung)
       update Code cleanup for all service methods (use TRACE,
              JK_LOG_NULL_PARAMS, null pointer checks). (rjung)
       update JKSTATUS: add refresh link. No refresh for updates. Redirect
              to list view after update. (rjung)
       update Add new hook add_log_items into servers. (rjung)
       update APACHE httpd: Rename apache logging notes. (rjung)
       update LB: Rename lock and method constants. Add constants for
              defaults. (rjung)
       fix    Default log level should be INFO and not DEBUG. Default log
              level should be the same for all server types. (rjung)
       fix    Make rewrite_rule_map and log_level as non mandatory
              directives for isapi_redirect. (mturk)
       fix    40107: Rewrite is_socket_connected function. Non blocking
              socket is not used any more. (mturk)
       update Allow building with VS2005 without too many warnings. (mturk)
       fix    Decide by MMN, which piped log API we should use. mod_jk
              1.2.18 broke compilation with Apache 1.3 pre 1.3.28. (rjung)

   Changes between 1.2.17 and 1.2.18
     Native
       fix    Using socklen_t in getsockopt. Also introducing jk_sock_t.
              (mturk)
       update Allow recovery wait time below 60 seconds (new minimum is 1
              second). (mturk)

   Changes between 1.2.16 and JK 1.2.17
     Native
       fix    Fix hanging jk status worker when certain attributes are being
              updated due to double locking. (rjung)
       update Allow JkMount to behave like uriworkermap.properties by
              parsing pipe symbol as two directive marker. (mturk)

   Changes between 1.2.15 and JK 1.2.16
     Native
       update Added simple rewrite capability for IIS. Although simple it
              will fulfill most needs. (mturk)
       update Added RECOVER_ABORT_IF_CLIENTERROR recovery_option that closes
              the connection if client connection is broken during the
              request. (mturk)
       update Renamed cache_timeout directive to connection_pool_timeout.
              (mturk)
       update Added connection_pool_minsize directive. (mturk)
       update Deprecate recycle_timeout directive. (mturk)
       update Corrected some HTML syntax bugs in output of status worker.
              (rjung)
       update Added the refresh=n parameter to the status worker. It will
              update the display every n seconds. (rjung)
       update Balancer: Add attribute distance to balanced workers to
              express preferences between workers. (rjung)
       update Balancer: Add attribute jvm_route to balanced workers to be
              able to use the same target in different balancers. (rjung)
       update Status: Add lb_mult to status. (rjung)
       update Balancer: Make different balancing strategies work in a
              similar way (use lb_value, use decay during global
              maintenance, use integer factors for weights. (rjung)
       update Balancer: Improve locking. (rjung)
       update Balancer: Workers start slower after recovering. (rjung)
       update Balancer: Make different balancing strategies work in a
              similar way (use lb_value, use decay during global
              maintenance, use integer factors lb_mult for weights). (rjung)
       update Balancer: Move recovery check to global maintenance. (rjung)
       update Balancer: Add global maintenance method, that is called in
              only one process. (rjung)
       update Extend our use of autoconf to find a 32Bit and a 64Bit
              unsigned type and their printf formats. (rjung)
       update Logging: piped loggers for JkLogFile and Apache 1.3. (rjung)
       update Logging: Add PID to log lines for each log level apart from
              REQUEST. (rjung)
       update Logging: flush buffered logs to keep lines in correct order.
              Output final newline together with log message. (rjung)
       update Reducing shm size. (rjung)
       update Only log removing of old worker, when we actually do it.
              (rjung)
       fix    37469: Fix shared memory close for forked childs. The shared
              memory will be closed by the parent process. (mturk)
       fix    37332: Fix potential misuse of buffer length with snprintf
              functions. (mturk)
       fix    38859: [CVE-2006-7197] Protect mod_jk against buggy or
              malicious AJP servers in the backend. Patch provided by
              Ruediger Pluem. (mturk)
       fix    38889: Use worker map sorting depending on the path elements,
              to comply with Servlet spec. Patch provided by Steve Revilak.
              (mturk)
       update 36138: Added Busyness lb method. Patch provided by Chris
              Lamprecht. (mturk)
       fix    Fix pessimistic locking mode. The patch correctly handles the
              burst load, by syncing the access to the shared memory data.
              (mturk)
       fix    38806: Reclycle worker even if it is disabled. This fixes
              hot-standby workers in error state. (mturk)
       fix    37167: Allow building with BSD-ish like make. (mturk)
       fix    ISAPI plugin (isapi_redirect.dll) did not provide correct
              request data for IIS to include in the IIS log. (markt)

   Changes between 1.2.14 and 1.2.15
     Native
       fix Fix AJP13 Cookie2 parsing. Cookie2 was always send as Cookie.
           Patch provided by Andre Gebers. (mturk)
       fix 35862: NSAPI plugin attempts to read freed memory and attempts to
           dereference a null pointer. Patch provided by Brian Kavanagh.
           (markt)

   Changes between 1.2.13 and 1.2.14
     Native
       fix Fix lb for worker mpm's with cachesize set to lower number then
           ThreadsPerChild is. If retries is set to value larger then 3
           sleep for 100 ms on each attempt. This enables to tune the
           connection cache, and serialize incoming connections instead
           returning busy if connection count is larger then cachesize.
           (mturk)
       fix 36525: Solaris core dump. (mturk)
       fix 36102: Worker actions do not persist. (mturk)
       fix 35864: Status worker doesn't list workers. Patch provided by
           Martin Goldhahn. (mturk)
       fix 35809: JkMountCopy don't work for Apache 2.0 Patch provided by
           Christophe Dubach. (mturk)
       fix 35298: Multiple JK/ISAPI redirectors on a single IIS site are not
           supported Patch provided by Tim Whittington. (mturk)

   Changes between 1.2.12 and 1.2.13
     Native
       fix    34397: Emergency was handled as Error. (jfclere)
       fix    34474: // in URL were not handled correctly with Apache-1.3.
              (jfclere)
       fix    Use 64 bits int for transferred/read bytes.
       update Added JkOptions +FlushPackets used to optimize memory usage
              when sending large data. (mturk)
       update Added lock directive for load balancer that allows more
              acurate load balancing in case of burst load. (mturk)
       update Added worker.maintain directive to allow customizing default
              10 second timeout. On busy servers this value needs to be set
              on higher value. (mturk)
       fix    Fix for NetWare compiler to deal with different types between
              AP13 and AP2 SDKs. (fuankg)
       update Emit much more legible user.dmp crash analysis output for
              WIN32. (wrowe)
       fix    34558: Fix first failover request. (mturk)

   Changes between 1.2.11 and 1.2.12
     Native
       update Added ForwardLocallAddres JkOptions flag for passing local
              instead remote address. Useful for remote addr valve. (mturk)
       fix    Fix that worker not used, when stopped flag is true. (pero)
       update Add loadbalance default worker secret attribute to the
              documentation (pero)

   Changes between 1.2.10 and 1.2.11
     Native
       fix    Backport SC_M_JK_STORED from JK2 for passing arbitrary methods
              instead failing the request. (mturk)
       fix    Added missing SEARCH and ACL http methods. (mturk)
       update Add worker secret attribute to the documentation (pero)
       update Add a stopped flag to worker configuration. Set flag True and
              complete traffic to worker is stopped. Also update the Ant
              JkStatusUpdateTask at Tomcat 5.5.10 release. Only usefull in a
              replicated session cluster.(pero)
       update Added worker maintain function that will maintain all the
              workers instead just the current one. This enables to recycle
              the connections on all workers. (mturk)
       update Use shutdown when recycling connections instead hard breaking
              the socket. (mturk)
       update Add unique directives checking. The directives if unique are
              now overwritten instead concatenated. (mturk)
       update Allow multiple worker.list directives. (mturk)
       fix    34577: For IIS log original request instead loging the request
              for ISAPI extension. (mturk)
       fix    34558: Make sure the returned status codes are the same for
              ajp and lb workers. (mturk)
       fix    34423: Use APR_USE_FLOCK_SERIALIZE for setting log lock on
              platforms like FreeBSD. Patch provided by Allan Saddi. (mturk)
       fix    33843: Fix obtaining LDFLAGS that were used for building
              Apache HTTPD. Patch provided by Beat Kneubuehl. (mturk)
       fix    34358: Enable load balancer method configuration. (glenn)
       fix    34357: In some situations Apache 2 mod_jk could segfault when
              the JkAutoAlias directive is used. (glenn)
       update Add --enable-prefork to the documentation (pero)

   Changes between 1.2.9 and 1.2.10
     Native
       update Set default shared memory to 64K instead 1M. (mturk)
       fix    Do not mark the worker in error state if headers are larger
              then AJP13 limit. (mturk)
       update On Series you should use the latest PTF for Apache 2.0 (which
              is now 2.0.52) and ad minima SI17402/SI17061 or cumulative
              including them. (hgomez)
       update Change the xml status format to xml attribute syntax (pero)
       fix    33248: Fix builds where apxs defines multiple directories for
              APR includes. (mturk)
       fix    32696: Return 404 instead 403 when WEB-INF is requested to
              comply with Servlet spec. (mturk)
       update Added ANT task for managing jkstatus. (pero)
       update If socket_timeout is set, check if socket is alive before
              sending any request to Tomcat. (mturk)
       update Added JkMountFile for Apache web servers. This file can
              contain uri mappings in the form (/url=worker), and is checked
              for updates at regular 60 second interval. (mturk)
       update Added status worker for managing worker runtime data using web
              page. (mturk)
       update Added load balancer method directive that is used for setting
              the algorithm used for balancing workers. Method can be either
              Request (default) or Traffic. (mturk)
       update Added shared memory to allow dynamic configuration. Shared
              memory is needed only for unix platform and web servers having
              multiple child processes. For Apache web server two new
              directives has been added (JkShmFile and JkShmSize). (mturk)
       update Added textupdate mode to status worker to handle remote
              updates from ant tasks.(pero)
       fix    33562: Fix Reply_timeout when recovery_options is larger than
              1. Patch provided by Takashi Satou. (mturk)
       fix    33308: Fix segfaults when ForwardDirectories is enabled with
              Apache 1.3

   Changes between 1.2.7 and 1.2.8
     Native
       update Allow anyone to debug and diagnose stack dumps using windbg or
              any other debugging tool, and (if they add the .pdb files to
              their installation) to make sense of dr watson logs. Patch
              provided by William A. Rowe (wrowe)
       fix    Fix in_addr_t usage by using the real struct ignoring typedef.
              Patch provided by William A. Rowe (wrowe)
       fix    Fix url rewriting by restoring the in place uri from which the
              jsessionid was removed. (mturk)
       update Make load balancer algorithm thread safe by introducing mutex
              to the load balancer worker. (mturk)
       fix    Fix sending error pages for IIS to client by adding
              Content-Type header using correct api function call. (mturk)
       fix    32696: Prevent IIS from crushing when web-inf url was
              requested. (mturk)
       update Use default cachesize for servers that support discovering the
              number of threads per child process. (mturk).
       fix    Fix Apache content-length header parsing using case
              insensitive compare. (billbarker)
       fix    Fix parsing AJP headers using case insensitive compare.
              (mturk)
       fix    Use infinite socket timeout if socket_timeout is set to zero
              or less then zero. (mturk)
       update Change balanced_workers to balance_workers but keep backward
              compatibility preserving the old directive. (mturk).
       fix    Fix ajp initialization for workers with cache_size set to
              zero. (mturk)
       update 32317: Making mod_jk replication aware (Clustering Support).
              Patch provided by Rainer Jung. (mturk).
       fix    31132: Core dump when JkLogFile is missing from conf. (mturk)

   Changes between 1.2.6 and 1.2.7
     Native
       update Added new property named recover_time that can be used to
              change the default 60 second recover time. (mturk)
       update Added custom retries for worker, so we don't depend on default
              setting. If set to a number grater then 3, it will sleep for
              100ms on retry greater then 3 and then try again. (mturk)
       update Added JkWorkerProperty directive that enables omiting
              workers.properties file. For example: JkWorkerProperty
              worker.ajp13a.port=8009. (mturk)
       fix    Check all JSESSIONID cookies for a valid jvmRoute. If you have
              multiple Tomcats with overlapping domains, then you can get
              multiple cookies without a defined order. This will route
              correctly as long as the different domains don't have any
              Tomcats in common. (billbarker)
       update Added JkUnMount directive for negative mappings that works as
              opposite to JkMount directives. It is used for blocking of
              particular URL or content type. (mturk)
       update Added wildchar match uri mappings. One can now use JkMount to
              map /app/*/servlet/* or /app?/*/*.jsp. (mturk)
       update Rewrite the logging by adding Trace options. (mturk)
       update Added socket_timeout property that sets the timeout for the
              socket itself. (mturk)
       fix    Changed socket_timeout property to recycle_timeout. This
              better explains what the directive actually does. (mturk)
       fix    Changed the load balancer algorithm. The idea behind this new
              scheduler is the following: lbfactor is how much we expect
              this worker to work, or the worker's work quota. lbstatus is
              how urgent this worker has to work to fulfill its quota of
              work. We distribute each worker's work quota to the worker,
              and then look which of them needs to work most urgently
              (biggest lbstatus). This worker is then selected for work, and
              its lbstatus reduced by the total work quota we distributed to
              all workers. Thus the sum of all lbstatus does not change.(*)
              If some workers are disabled, the others will still be
              scheduled correctly. (mturk)

   JK 2
     JK2 has been put in maintainer mode and no further development will
     take place. The reason for shutting down JK2 development was the lack
     of developers interest. Other reason was lack of users interest in
     adopting JK2, caused by configuration complexity when compared to JK.
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