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| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 02:41:33 -0500 |
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| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 02:43:36 -0500 |
| commit | 9401f816dd0d9d550fe98a8507224bde51c4b847 (patch) | |
| tree | 94f2d7a7893a787bafdca8b5ef063ea316938874 /rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html | |
| parent | e8ec7aa8e38a93f5b034ac74cebce5de23710317 (diff) | |
upload tomcat
JIRA: BOTTLENECK-7
Change-Id: I875d474869efd76ca203c30b60ebc0c3ee606d0e
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html')
| -rw-r--r-- | rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html b/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html new file mode 100644 index 00000000..c8d5dcf2 --- /dev/null +++ b/rubbos/app/tomcat-connectors-1.2.32-src/docs/news/printer/20081001.html @@ -0,0 +1,157 @@ +<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>The Apache Tomcat Connector - News - 2008 News and Status</title><meta name="author" value="Apache Tomcat Connectors Project"><meta name="email" value="dev.AT.tomcat.DOT.apache.DOT.org"><link href="../../style.css" type="text/css" rel="stylesheet"></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="4"><!--PAGE HEADER--><tr><td colspan="2"><!--TOMCAT LOGO--><a href="http://tomcat.apache.org/"><img src="../../images/tomcat.gif" align="left" alt="Apache Tomcat" border="0"></a><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="http://www.apache.org/images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left"><table border="0" width="100%" cellspacing="4"><tr><td align="left" valign="top"><h1>The Apache Tomcat Connector - News</h1><h2>2008 News and Status</h2></td><td align="right" valign="top" nowrap="true"><img src="../../images/void.gif" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr></table><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="2008 News & Status"><strong>2008 News & Status</strong></a></font></td></tr><tr><td><blockquote> +<br> +<table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="28 October - JK-1.2.27 released"><strong>28 October - JK-1.2.27 released</strong></a></font></td></tr><tr><td><blockquote> +<a name="20081028.1"></a> +<br> +<p>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. +</p><p> + Please see the <a href="../../miscellaneous/changelog.html">ChangeLog</a> for a full list of changes. +</p> +<p>If you find any bugs while using this release, please fill in the +<a href="https://issues.apache.org/bugzilla/enter_bug.cgi?product=Tomcat%20Connectors">Bugzilla</a> +Bug Report. +</p> +<p> +The most important new features in this version are: +</p> +<h3>Watchdog Thread for Periodic Tasks</h3> +<p> +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. +</p> +<p> +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. +</p> +<p> +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 +<a href="../../reference/apache.html"><b class="code">JkWatchdogInterval</b></a> +for Apache or +<a href="../../reference/iis.html"><b class="code">watchdog_interval</b></a> +for IIS. +</p> +<h3>Connection Probing</h3> +<p> +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 +<a href="../../reference/workers.html"><b class="code">ping_mode</b></a>. +This will also be useful as a protection against the infamous firewall +idle connection drop. +</p> +<p> +The older attributes <b class="code">connect_timeout</b> and <b class="code">prepost_timeout</b> +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 <b class="code">ping_mode</b>, +<b class="code">ping_timeout</b> and <b class="code">connection_ping_interval</b>. +</p> +<h3>Mount Extensions</h3> +<p> +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. +</p> +<p> +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). +</p> +<p> +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. +</p> +<p> +Starting with this release, you can add so-called +<a href="../../reference/uriworkermap.html#Rule extensions">rule extensions</a> +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. +</p> +<h3>Improved IIS support</h3> +<p> +We improved IIS support im various ways. It is now possible to use +multiple IIS 6 application pools with the ISAPI redirector. +</p> +<p> +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. +</p> +<p> +Another new feature is an elegant way of configuring error page redirects. +All new features are documented on the documentation page about +<a href="../../reference/iis.html">configuring IIS</a>. +</p> +<h3>Enhanced Status Worker</h3> +<p> +The +<a href="../../reference/status.html">status worker</a> +now can also manage and show statistics for AJP workers that +are not part of a load balancer. Other improvements are the new <b class="code">dump</b> +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. +</p> +<p> +Unfortunately we had to change +<a href="../../reference/status.html#Data Parameters for the standard Update Action">some request parameters</a> +used for the <b class="code">update</b> action of the status worker. +</p> +<h3>Miscellaneous Improvements</h3> +<p> +Further enhancements are: +<ul> +<li> +Configurable session stickyness indicator: cookie name and URL path +parameter name can be freely chosen instead of the servlet spec compliant +<b class="code">JSESSIONID</b> and <b class="code">;jsessionid</b>. +</li> +<li> +Automatically determining the size of the shared memory segment needed +to accommodate all workers. +</li> +<li> +New connection establishment timeout <b class="code">socket_connect_timeout</b>. +</li> +<li> +New timeout <b class="code">connection_acquire_timeout</b> for acquiring a free connection from +the pool. +</li> +<li> +Improved retry handling by adjusting the meaning of the attribute <b class="code">retries</b> for +AJP workers and for load balancers and by adding the new <b class="code">retry_interval</b>. +</li> +<li> +Allowing the web server to provide error pages instead of Tomcat. +</li> +</ul> +</p> +</blockquote></td></tr></table> +</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em> + Copyright © 1999-2011, Apache Software Foundation + </em></font></div></td></tr></table></body></html>
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