From 9401f816dd0d9d550fe98a8507224bde51c4b847 Mon Sep 17 00:00:00 2001 From: hongbotian Date: Mon, 30 Nov 2015 02:41:33 -0500 Subject: upload tomcat JIRA: BOTTLENECK-7 Change-Id: I875d474869efd76ca203c30b60ebc0c3ee606d0e Signed-off-by: hongbotian --- .../docs/news/20081001.html | 158 +++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 rubbos/app/tomcat-connectors-1.2.32-src/docs/news/20081001.html (limited to 'rubbos/app/tomcat-connectors-1.2.32-src/docs/news/20081001.html') diff --git a/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/20081001.html b/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/20081001.html new file mode 100644 index 00000000..1a263074 --- /dev/null +++ b/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/20081001.html @@ -0,0 +1,158 @@ +The Apache Tomcat Connector - News - 2008 News and Status

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The Apache Tomcat Connector - News

2008 News and Status

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2008 News & Status

+
+
28 October - JK-1.2.27 released
+ +
+
The Apache Tomcat team is proud to announce the immediate availability +of Tomcat Connectors 1.2.27. This is a stable release adding lots of new features +and some bug fixes. +
+ Please see the ChangeLog for a full list of changes. +
+
If you find any bugs while using this release, please fill in the +Bugzilla +Bug Report. +
+
+The most important new features in this version are: +
+
Watchdog Thread for Periodic Tasks
+
+The connector has to run some periodic tasks independant of +request processing. Examples are probing or closing down idle backend +connections, adjusting load numbers and recovering workers from error state. +
+
+Before version 1.2.27 these tasks were done inside the request processing loop. +When a new request came in and the task was due, the thread handling the +request first executed the internal task and then handled the request. +If there were no requests coming in, the tasks would not run. If any of +the tasks took unexpectedly long, the response time of the request waiting +for the finishing of the task went up. +
+
+Starting with this release you can configure a separate watchdog thread inside +the web server to run all those tasks independantly of request processing. +This new feature is avaliable for the connector when used with Apache httpd 2.x +or with Microsoft IIS. To keep the behaviour of the new version consistent +with previous releases, this feature is turned off by default. +You can activate the watchdog thread via +JkWatchdogInterval +for Apache or +watchdog_interval +for IIS. +
+
Connection Probing
+
+In previous releases connection probing (checking whether connections still work) +could only be done immediately after a new connection was established and +directly before sending each request. Since we now have the watchdog +thread available, we also added a periodic probing option, which you +can activate with the worker attribute +ping_mode. +This will also be useful as a protection against the infamous firewall +idle connection drop. +
+
+The older attributes connect_timeout and prepost_timeout +still exist and work the same way they did in previous releases. +Since there are now three different probing options, we recommend to migrate +your configuration to the newer attributes ping_mode, +ping_timeout and connection_ping_interval. +
+
Mount Extensions
+
+Usually one defines workers and mounts for the connector. +A worker defines a backend we want to talk to and the configuration parameters of the +communication, connection pools etc. The mounts define which URIs we want to forward to +which worker (so we also call a mount an URI map rule). +In version 1.2.27 you can overwrite certain worker parameter per mount. +
+
+One easy to understand example is reply timeouts. Until this release you had to specify +a reply timeout for the whole worker. But reply times depend a lot on the type of +request. So normally you want to define a general reply timeout and +for some special URLs you need to relax the reply timeout, because you know those +URLs take much longer to process (like e.g. reporting or other compute intensive tasks). +
+
+Another possible case is the activation status. You might use a load balancer worker to +forward requests to certain webapps in a farm of Tomcat nodes. If you wanted +to update some webapp on one node, you previously had to stop forwarding requests for +all webapps on this Tomcat node. What was not possible until now, was stopping forwarding +requests restricted to the webapp and the node you wanted to update. +
+
+Starting with this release, you can add so-called +rule extensions +to your uriworkermap file to influence worker parameters per mount. This will +work for all Apache versions and for IIS. Remember, that +the uriworkermap file automatically gets reloaded after changes without web server +restart. +
+
Improved IIS support
+
+We improved IIS support im various ways. It is now possible to use +multiple IIS 6 application pools with the ISAPI redirector. +
+
+Furthermore some improvements were added as compile time features. +The most notable one is chunked encoding support, which was a major +refactoring and is therefore still considered experimental. You can +download binaries with and without chunked encoding support. In future +versions, chunked encoding will likely be availabe in all builds. +
+
+Another new feature is an elegant way of configuring error page redirects. +All new features are documented on the documentation page about +configuring IIS. +
+
Enhanced Status Worker
+
+The +status worker +now can also manage and show statistics for AJP workers that +are not part of a load balancer. Other improvements are the new dump +action, the integration of the new configuration attributes, showing average +request and transfer rates since the last statistics reset and the ability to +display only a single member of a load balancer. +
+
+Unfortunately we had to change +some request parameters +used for the update action of the status worker. +
+
Miscellaneous Improvements
+
+Further enhancements are: +
+
+Configurable session stickyness indicator: cookie name and URL path +parameter name can be freely chosen instead of the servlet spec compliant +JSESSIONID and ;jsessionid. +
+
+Automatically determining the size of the shared memory segment needed +to accommodate all workers. +
+
+New connection establishment timeout socket_connect_timeout. +
+
+New timeout connection_acquire_timeout for acquiring a free connection from +the pool. +
+
+Improved retry handling by adjusting the meaning of the attribute retries for +AJP workers and for load balancers and by adding the new retry_interval. +
+
+Allowing the web server to provide error pages instead of Tomcat. +
+
+
+
+

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