升级Tomcat版本 apache-tomcat-7.0.77
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+</style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="../images/tomcat.gif" align="right" alt="
The Apache Tomcat Servlet/JSP Container
- " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.41, May 19 2014</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap="nowrap" class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>web.xml</strong></p><ul><li><a href="filter.html">Filter</a></li></ul><p><strong>Other</strong></p><ul><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Apache Tomcat Configuration Reference</h1><h2>The AJP Connector</h2><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
-<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementations">Standard Implementations</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li></ul>
+ " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.77, Mar 28 2017</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.svg" align="right" alt="Apache Logo" border="0" style="width: 266px;height: 83px;"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="sessionidgenerator.html">SessionIdGenerator</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>web.xml</strong></p><ul><li><a href="filter.html">Filter</a></li></ul><p><strong>Other</strong></p><ul><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>The AJP Connector</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementations">Standard Implementations</a></li><li><a href="#Java_TCP_socket_attributes">Java TCP socket attributes</a></li><li><a href="#NIO_specific_configuration">NIO specific configuration</a></li><li><a href="#APR/native_specific_configuration">APR/native specific configuration</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Special_Features">Special Features</a><ol><li><a href="#Proxy_Support">Proxy Support</a></li><li><a href="#Connector_Comparison">Connector Comparison</a></li></ol></li></ul>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
<p>The <strong>AJP Connector</strong> element represents a
<strong>Connector</strong> component that communicates with a web
connector via the <code>AJP</code> protocol. This is used for cases
- where you wish to invisibly integrate Tomcat 6 into an existing (or new)
+ where you wish to invisibly integrate Tomcat into an existing (or new)
Apache installation, and you want Apache to handle the static content
contained in the web application, and/or utilize Apache's SSL
processing.</p>
<p>This connector supports load balancing when used in conjunction with
- the <code>jvmRoute</code> attribute of the
+ the <code>jvmRoute</code> attribute of the
<a href="engine.html">Engine</a>.</p>
-<p>The native connectors supported with this Tomcat release are:
-<ul>
- <li>JK 1.2.x with any of the supported servers</li>
- <li>mod_proxy on Apache httpd 2.x (included by default in Apache HTTP Server 2.2),
- with AJP enabled: see
- <a href="http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html">the httpd docs</a>
+ <p>The native connectors supported with this Tomcat release are:</p>
+ <ul>
+ <li>JK 1.2.x with any of the supported servers. See
+ <a href="http://tomcat.apache.org/connectors-doc/">the JK docs</a>
for details.</li>
-</ul>
-</p>
+ <li>mod_proxy on Apache httpd 2.x (included by default in Apache HTTP
+ Server 2.2), with AJP enabled: see
+ <a href="http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html">the
+ httpd docs</a> for details.</li>
+ </ul>
-<p><b>Other native connectors supporting AJP may work, but are no longer supported.</b></p>
+ <p><b>Other native connectors supporting AJP may work, but are no longer
+ supported.</b></p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>
@@ -38,37 +115,49 @@
<p>All implementations of <strong>Connector</strong>
support the following attributes:</p>
- <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code>allowTrace</code></td><td align="left" valign="center">
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">ajpFlush</code></td><td align="left" valign="center">
+ <p>A boolean value which can be used to enable or disable sending
+ AJP flush messages to the fronting proxy whenever an explicit
+ flush happens. The default value is <code>true</code>.<br>
+ An AJP flush message is a SEND_BODY_CHUNK packet with no body content.
+ Proxy implementations like mod_jk or mod_proxy_ajp will flush the
+ data buffered in the web server to the client when they receive
+ such a packet. Setting this to <code>false</code> can reduce
+ AJP packet traffic but might delay sending packets to the client.
+ At the end of the response, AJP does always flush to the client.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">allowTrace</code></td><td align="left" valign="center">
<p>A boolean value which can be used to enable or disable the TRACE
HTTP method. If not specified, this attribute is set to false.</p>
- </td></tr><tr><td align="left" valign="center"><code>emptySessionPath</code></td><td align="left" valign="center">
- <p>If set to <code>true</code>, all paths for session cookies will be set
- to <code>/</code>. This can be useful for portlet specification implementations.
- If not specified, this attribute is set to <code>false</code>.</p>
- </td></tr><tr><td align="left" valign="center"><code>enableLookups</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">asyncTimeout</code></td><td align="left" valign="center">
+ <p>The default timeout for asynchronous requests in milliseconds. If not
+ specified, this attribute is set to 10000 (10 seconds).</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">enableLookups</code></td><td align="left" valign="center">
<p>Set to <code>true</code> if you want calls to
<code>request.getRemoteHost()</code> to perform DNS lookups in
order to return the actual host name of the remote client. Set
to <code>false</code> to skip the DNS lookup and return the IP
address in String form instead (thereby improving performance).
By default, DNS lookups are disabled.</p>
- </td></tr><tr><td align="left" valign="center"><code>maxHeaderCount</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxHeaderCount</code></td><td align="left" valign="center">
<p>The maximum number of headers in a request that are allowed by the
container. A request that contains more headers than the specified limit
will be rejected. A value of less than 0 means no limit.
If not specified, a default of 100 is used.</p>
- </td></tr><tr><td align="left" valign="center"><code>maxParameterCount</code></td><td align="left" valign="center">
- <p>The maximum number of parameters (GET plus POST) which will be
- automatically parsed by the container. A value of less than 0 means no
- limit. If not specified, a default of 10000 is used. Note that
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxParameterCount</code></td><td align="left" valign="center">
+ <p>The maximum number of parameter and value pairs (GET plus POST) which
+ will be automatically parsed by the container. Parameter and value pairs
+ beyond this limit will be ignored. A value of less than 0 means no limit.
+ If not specified, a default of 10000 is used. Note that
<code>FailedRequestFilter</code> <a href="filter.html">filter</a> can be
used to reject requests that hit the limit.</p>
- </td></tr><tr><td align="left" valign="center"><code>maxPostSize</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxPostSize</code></td><td align="left" valign="center">
<p>The maximum size in bytes of the POST which will be handled by
- the container FORM URL parameter parsing. The feature can be disabled by
- setting this attribute to a value less than or equal to 0.
- If not specified, this attribute is set to 2097152 (2 megabytes).</p>
- </td></tr><tr><td align="left" valign="center"><code>maxSavePostSize</code></td><td align="left" valign="center">
+ the container FORM URL parameter parsing. The limit can be disabled by
+ setting this attribute to a value less than zero. If not specified, this
+ attribute is set to 2097152 (2 megabytes). Note that the
+ <a href="filter.html#Failed_Request_Filter"><code>FailedRequestFilter</code></a>
+ can be used to reject requests that exceed this limit.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxSavePostSize</code></td><td align="left" valign="center">
<p>The maximum size in bytes of the POST which will be saved/buffered by
the container during FORM or CLIENT-CERT authentication. For both types
of authentication, the POST will be saved/buffered before the user is
@@ -81,78 +170,85 @@
attribute to -1. Setting the attribute to zero will disable the saving of
POST data during authentication. If not specified, this attribute is set
to 4096 (4 kilobytes).</p>
- </td></tr><tr><td align="left" valign="center"><code>parseBodyMethods</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">parseBodyMethods</code></td><td align="left" valign="center">
<p>A comma-separated list of HTTP methods for which request
bodies will be parsed for request parameters identically
to POST. This is useful in RESTful applications that want to
support POST-style semantics for PUT requests.
Note that any setting other than <code>POST</code> causes Tomcat
- to behave in a way that does against the intent of the servlet
+ to behave in a way that goes against the intent of the servlet
specification.
The HTTP method TRACE is specifically forbidden here in accordance
with the HTTP specification.
The default is <code>POST</code></p>
- </td></tr><tr><td align="left" valign="center"><strong><code>port</code></strong></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">port</code></strong></td><td align="left" valign="center">
<p>The TCP port number on which this <strong>Connector</strong>
will create a server socket and await incoming connections. Your
operating system will allow only one server application to listen
- to a particular port number on a particular IP address.</p>
- </td></tr><tr><td align="left" valign="center"><code>protocol</code></td><td align="left" valign="center">
- <p>Sets the protocol to handle incoming traffic. The default value is
- <code>AJP/1.3</code> and configures
- <code>org.apache.jk.server.JkCoyoteHandler</code> the original blocking
- Java connector by default.<br>
- If the <code>PATH</code> (Windows) or <code>LD_LIBRARY_PATH</code>
- (on most unix systems) environment variables contain the Tomcat
- native library, the native/APR connector will automatically be
- configured instead.<br>
+ to a particular port number on a particular IP address. If the special
+ value of 0 (zero) is used, then Tomcat will select a free port at random
+ to use for this connector. This is typically only useful in embedded and
+ testing applications.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">protocol</code></td><td align="left" valign="center">
+ <p>Sets the protocol to handle incoming traffic. To configure an AJP
+ connector this must be specified. If no value for protocol is provided,
+ an <a href="http.html">HTTP connector</a> rather than an AJP connector
+ will be configured.<br>
+ The standard protocol value for an AJP connector is <code>AJP/1.3</code>
+ which uses an auto-switching mechanism to select either a Java based
+ connector or an APR/native based connector. If the
+ <code>PATH</code> (Windows) or <code>LD_LIBRARY_PATH</code> (on most unix
+ systems) environment variables contain the Tomcat native library, the
+ native/APR connector will be used. If the native library cannot be
+ found, the Java BIO based connector will be used.<br>
To use an explicit protocol rather than rely on the auto-switching
mechanism described above, the following values may be used:<br>
- <code>org.apache.jk.server.JkCoyoteHandler</code>
- - original blocking Java connector<br>
<code>org.apache.coyote.ajp.AjpProtocol</code>
- - new blocking Java connector that supports an executor<br>
+ - blocking Java connector<br>
+ <code>org.apache.coyote.ajp.AjpNioProtocol</code>
+ - non blocking Java connector.<br>
<code>org.apache.coyote.ajp.AjpAprProtocol</code>
- the APR/native connector.<br>
- Custom implementations may also be used.</p>
- </td></tr><tr><td align="left" valign="center"><code>proxyName</code></td><td align="left" valign="center">
+ Custom implementations may also be used.<br>
+ Take a look at our <a href="#Connector_Comparison">Connector
+ Comparison</a> chart.
+ </p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">proxyName</code></td><td align="left" valign="center">
<p>If this <strong>Connector</strong> is being used in a proxy
configuration, configure this attribute to specify the server name
to be returned for calls to <code>request.getServerName()</code>.
- See <a href="#Proxy Support">Proxy Support</a> for more
+ See <a href="#Proxy_Support">Proxy Support</a> for more
information.</p>
- </td></tr><tr><td align="left" valign="center"><code>proxyPort</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">proxyPort</code></td><td align="left" valign="center">
<p>If this <strong>Connector</strong> is being used in a proxy
configuration, configure this attribute to specify the server port
to be returned for calls to <code>request.getServerPort()</code>.
- See <a href="#Proxy Support">Proxy Support</a> for more
+ See <a href="#Proxy_Support">Proxy Support</a> for more
information.</p>
- </td></tr><tr><td align="left" valign="center"><code>redirectPort</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">redirectPort</code></td><td align="left" valign="center">
<p>If this <strong>Connector</strong> is supporting non-SSL
requests, and a request is received for which a matching
<code><security-constraint></code> requires SSL transport,
Catalina will automatically redirect the request to the port
number specified here.</p>
- </td></tr><tr><td align="left" valign="center"><code>request.registerRequests</code></td><td align="left" valign="center">
- <p>This attribute controls request registration for JMX monitoring
- of the Connector. It is enabled by default, but may be turned
- it off to save a bit of memory.</p>
- </td></tr><tr><td align="left" valign="center"><code>scheme</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">scheme</code></td><td align="left" valign="center">
<p>Set this attribute to the name of the protocol you wish to have
returned by calls to <code>request.getScheme()</code>. For
example, you would set this attribute to "<code>https</code>"
for an SSL Connector. The default value is "<code>http</code>".
- See <a href="#SSL Support">SSL Support</a> for more information.</p>
- </td></tr><tr><td align="left" valign="center"><code>secure</code></td><td align="left" valign="center">
+ </p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">secure</code></td><td align="left" valign="center">
<p>Set this attribute to <code>true</code> if you wish to have
calls to <code>request.isSecure()</code> to return <code>true</code>
- for requests received by this Connector (you would want this on an
- SSL Connector). The default value is <code>false</code>.</p>
- </td></tr><tr><td align="left" valign="center"><code>URIEncoding</code></td><td align="left" valign="center">
+ for requests received by this Connector. You would want this on an
+ SSL Connector or a non SSL connector that is receiving data from a
+ SSL accelerator, like a crypto card, a SSL appliance or even a webserver.
+ The default value is <code>false</code>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">URIEncoding</code></td><td align="left" valign="center">
<p>This specifies the character encoding used to decode the URI bytes,
after %xx decoding the URL. If not specified, ISO-8859-1 will be used.
</p>
- </td></tr><tr><td align="left" valign="center"><code>useBodyEncodingForURI</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">useBodyEncodingForURI</code></td><td align="left" valign="center">
<p>This specifies if the encoding specified in contentType should be used
for URI query parameters, instead of using the URIEncoding. This
setting is present for compatibility with Tomcat 4.1.x, where the
@@ -160,11 +256,13 @@
Request.setCharacterEncoding method was also used for the parameters from
the URL. The default value is <code>false</code>.
</p>
- </td></tr><tr><td align="left" valign="center"><code>useIPVHosts</code></td><td align="left" valign="center">
+ <p><em>Notes:</em> See notes on this attribute in
+ <a href="http.html">HTTP Connector</a> documentation.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">useIPVHosts</code></td><td align="left" valign="center">
<p>Set this attribute to <code>true</code> to cause Tomcat to use
- the ServerName passed by the native web server to determine the Host
+ the IP address passed by the native web server to determine the Host
to send the request to. The default value is <code>false</code>.</p>
- </td></tr><tr><td align="left" valign="center"><code>xpoweredBy</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">xpoweredBy</code></td><td align="left" valign="center">
<p>Set this attribute to <code>true</code> to cause Tomcat to advertise
support for the Servlet specification using the header recommended in the
specification. The default value is <code>false</code>.</p>
@@ -174,31 +272,42 @@
<table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Standard Implementations"><!--()--></a><a name="Standard_Implementations"><strong>Standard Implementations</strong></a></font></td></tr><tr><td><blockquote>
- <p>To use AJP, you
- must specify the protocol attribute (see above).</p>
+ <p>To use AJP, you must specify the protocol attribute (see above).</p>
- <p><strong>These implementations support the AJP 1.3 protocol.</strong></p>
+ <p>The standard AJP connectors (BIO, NIO and APR/native) all support the
+ following attributes in addition to the common Connector attributes listed
+ above.</p>
- <p>They support the following additional attributes (in addition to the
- common attributes listed above):</p>
-
- <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code>address</code></td><td align="left" valign="center">
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">acceptCount</code></td><td align="left" valign="center">
+ <p>The maximum queue length for incoming connection requests when
+ all possible request processing threads are in use. Any requests
+ received when the queue is full will be refused. The default
+ value is 100.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">acceptorThreadCount</code></td><td align="left" valign="center">
+ <p>The number of threads to be used to accept connections. Increase this
+ value on a multi CPU machine, although you would never really need more
+ than <code>2</code>. Also, with a lot of non keep alive connections, you
+ might want to increase this value as well. Default value is
+ <code>1</code>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">acceptorThreadPriority</code></td><td align="left" valign="center">
+ <p>The priority of the acceptor threads. The threads used to accept
+ new connections. The default value is <code>5</code> (the value of the
+ <code>java.lang.Thread.NORM_PRIORITY</code> constant). See the JavaDoc
+ for the <code>java.lang.Thread</code> class for more details on what
+ this priority means.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">address</code></td><td align="left" valign="center">
<p>For servers with more than one IP address, this attribute
specifies which address will be used for listening on the specified
port. By default, this port will be used on all IP addresses
associated with the server. A value of <code>127.0.0.1</code>
indicates that the Connector will only listen on the loopback
interface.</p>
- </td></tr><tr><td align="left" valign="center"><code>backlog</code></td><td align="left" valign="center">
- <p>The maximum queue length for incoming connection requests when
- all possible request processing threads are in use. Any requests
- received when the queue is full will be refused. The default
- value is 100.</p>
- </td></tr><tr><td align="left" valign="center"><code>bufferSize</code></td><td align="left" valign="center">
- <p>The size of the output buffer to use. If less than or equal to zero,
- then output buffering is disabled. The default value is -1
- (i.e. buffering disabled)</p>
- </td></tr><tr><td align="left" valign="center"><code>clientCertProvider</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">bindOnInit</code></td><td align="left" valign="center">
+ <p>Controls when the socket used by the connector is bound. By default it
+ is bound when the connector is initiated and unbound when the connector is
+ destroyed. If set to <code>false</code>, the socket will be bound when the
+ connector is started and unbound when it is stopped.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">clientCertProvider</code></td><td align="left" valign="center">
<p>When client certificate information is presented in a form other than
instances of <code>java.security.cert.X509Certificate</code> it needs to
be converted before it can be used and this property controls which JSSE
@@ -207,67 +316,288 @@
with the <a href="valve.html#SSL_Authenticator_Valve">
org.apache.catalina.valves.SSLValve</a>.If not specified, the default
provider will be used.</p>
- </td></tr><tr><td align="left" valign="center"><code>connectionTimeout</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">connectionLinger</code></td><td align="left" valign="center">
+ <p>The number of seconds during which the sockets used by this
+ <strong>Connector</strong> will linger when they are closed. The default
+ value is <code>-1</code> which disables socket linger.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">connectionTimeout</code></td><td align="left" valign="center">
<p>The number of milliseconds this <strong>Connector</strong> will wait,
after accepting a connection, for the request URI line to be
- presented. The default value is infinite (i.e. no timeout).</p>
- </td></tr><tr><td align="left" valign="center"><code>deferAccept</code></td><td align="left" valign="center">
- <p>Sets the <code>TCP_DEFER_ACCEPT</code> flag on the listening socket for
- this connector. The default value is <code>true</code> where
- <code>TCP_DEFER_ACCEPT</code> is supported by the operating system,
- otherwise it is <code>false</code>.</p>
- </td></tr><tr><td align="left" valign="center"><code>executor</code></td><td align="left" valign="center">
- <p>A reference to the name in an <a href="executor.html">Executor</a> element.
- If this attribute is enabled, and the named executor exists, the connector will
- use the executor, and all the other thread attributes will be ignored.
- This attribute is not supported by the original blocking Java
- connector.</p>
- </td></tr><tr><td align="left" valign="center"><code>keepAliveTimeout</code></td><td align="left" valign="center">
+ presented. The default value for AJP protocol connectors
+ is <code>-1</code> (i.e. infinite).</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">executor</code></td><td align="left" valign="center">
+ <p>A reference to the name in an <a href="executor.html">Executor</a>
+ element. If this attribute is set, and the named executor exists, the
+ connector will use the executor, and all the other thread attributes will
+ be ignored. Note that if a shared executor is not specified for a
+ connector then the connector will use a private, internal executor to
+ provide the thread pool.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">executorTerminationTimeoutMillis</code></td><td align="left" valign="center">
+ <p>The time that the private internal executor will wait for request
+ processing threads to terminate before continuing with the process of
+ stopping the connector. If not set, the default is <code>0</code> (zero)
+ for the BIO connector and <code>5000</code> (5 seconds) for the NIO and
+ APR/native connectors.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">keepAliveTimeout</code></td><td align="left" valign="center">
<p>The number of milliseconds this <strong>Connector</strong> will wait for
another AJP request before closing the connection.
The default value is to use the value that has been set for the
connectionTimeout attribute.</p>
- </td></tr><tr><td align="left" valign="center"><code>maxThreads</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxConnections</code></td><td align="left" valign="center">
+ <p>The maximum number of connections that the server will accept and
+ process at any given time. When this number has been reached, the server
+ will accept, but not process, one further connection. This additional
+ connection be blocked until the number of connections being processed
+ falls below <strong>maxConnections</strong> at which point the server will
+ start accepting and processing new connections again. Note that once the
+ limit has been reached, the operating system may still accept connections
+ based on the <code>acceptCount</code> setting. The default value varies by
+ connector type. For BIO the default is the value of
+ <strong>maxThreads</strong> unless an <a href="executor.html">Executor</a>
+ is used in which case the default will be the value of maxThreads from the
+ executor. For NIO the default is <code>10000</code>.
+ For APR/native, the default is <code>8192</code>.</p>
+ <p>Note that for APR/native on Windows, the configured value will be
+ reduced to the highest multiple of 1024 that is less than or equal to
+ maxConnections. This is done for performance reasons.<br>
+ If set to a value of -1, the maxConnections feature is disabled
+ and connections are not counted.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxCookieCount</code></td><td align="left" valign="center">
+ <p>The maximum number of cookies that are permitted for a request. A value
+ of less than zero means no limit. If not specified, a default value of 200
+ will be used.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxThreads</code></td><td align="left" valign="center">
<p>The maximum number of request processing threads to be created
by this <strong>Connector</strong>, which therefore determines the
maximum number of simultaneous requests that can be handled. If
not specified, this attribute is set to 200. If an executor is associated
- with this connector, this attribute is ignored as the connector will
- execute tasks using the executor rather than an internal thread pool.</p>
- </td></tr><tr><td align="left" valign="center"><code>packetSize</code></td><td align="left" valign="center">
+ with this connector, this attribute is ignored as the connector will
+ execute tasks using the executor rather than an internal thread pool. Note
+ that if an executor is configured any value set for this attribute will be
+ recorded correctly but it will be reported (e.g. via JMX) as
+ <code>-1</code> to make clear that it is not used.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">minSpareThreads</code></td><td align="left" valign="center">
+ <p>The minimum number of threads always kept running. If not specified,
+ the default of <code>10</code> is used. If an executor is associated
+ with this connector, this attribute is ignored as the connector will
+ execute tasks using the executor rather than an internal thread pool. Note
+ that if an executor is configured any value set for this attribute will be
+ recorded correctly but it will be reported (e.g. via JMX) as
+ <code>-1</code> to make clear that it is not used.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">packetSize</code></td><td align="left" valign="center">
<p>This attribute sets the maximum AJP packet size in Bytes. The maximum
value is 65536. It should be the same as the <code>max_packet_size</code>
directive configured for mod_jk. Normally it is not necessary to change
the maximum packet size. Problems with the default value have been
reported when sending certificates or certificate chains. The default
- value is 8192.</p>
- </td></tr><tr><td align="left" valign="center"><strong><code>port</code></strong></td><td align="left" valign="center">
- <p>The TCP port number on which this <strong>Connector</strong>
- will create a server socket and await incoming connections. Your
- operating system will allow only one server application to listen
- to a particular port number on a particular IP address.</p>
- </td></tr><tr><td align="left" valign="center"><code>request.secret</code></td><td align="left" valign="center">
+ value is 8192. If set to less than 8192 then the setting will ignored and
+ the default value of 8192 used.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">processorCache</code></td><td align="left" valign="center">
+ <p>The protocol handler caches Processor objects to speed up performance.
+ This setting dictates how many of these objects get cached.
+ <code>-1</code> means unlimited, default is <code>200</code>. If not using
+ Servlet 3.0 asynchronous processing, a good default is to use the same as
+ the maxThreads setting. If using Servlet 3.0 asynchronous processing, a
+ good default is to use the larger of maxThreads and the maximum number of
+ expected concurrent requests (synchronous and asynchronous).</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">requiredSecret</code></td><td align="left" valign="center">
<p>Only requests from workers with this secret keyword will be accepted.
</p>
- </td></tr><tr><td align="left" valign="center"><code>request.shutdownEnabled</code></td><td align="left" valign="center">
- <p>If true and a secret has been configured, a correctly formatted AJP
- request (that includes the secret) will shutdown the Tomcat instance
- associated with this connector. This is set to <code>false</code> by
- default.</p>
- </td></tr><tr><td align="left" valign="center"><code>request.useSecret</code></td><td align="left" valign="center">
- <p>If set to <code>true</code>, then a random value for
- <code>request.secret</code> will be generated. It is for use with
- <code>request.shutdownEnabled</code>. This is set to <code>false</code>
- by default.</p>
- </td></tr><tr><td align="left" valign="center"><code>tcpNoDelay</code></td><td align="left" valign="center">
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">tcpNoDelay</code></td><td align="left" valign="center">
<p>If set to <code>true</code>, the TCP_NO_DELAY option will be
set on the server socket, which improves performance under most
circumstances. This is set to <code>true</code> by default.</p>
- </td></tr><tr><td align="left" valign="center"><code>tomcatAuthentication</code></td><td align="left" valign="center">
- <p>If set to <code>true</code>, the authentication will be done in Tomcat.
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">threadPriority</code></td><td align="left" valign="center">
+ <p>The priority of the request processing threads within the JVM.
+ The default value is <code>5</code> (the value of the
+ <code>java.lang.Thread.NORM_PRIORITY</code> constant). See the JavaDoc
+ for the <code>java.lang.Thread</code> class for more details on what
+ this priority means.If an executor is associated
+ with this connector, this attribute is ignored as the connector will
+ execute tasks using the executor rather than an internal thread pool. Note
+ that if an executor is configured any value set for this attribute will be
+ recorded correctly but it will be reported (e.g. via JMX) as
+ <code>-1</code> to make clear that it is not used.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">tomcatAuthentication</code></td><td align="left" valign="center">
+ <p>If set to <code>true</code>, the authentication will be done in Tomcat.
Otherwise, the authenticated principal will be propagated from the native
- webserver and used for authorization in Tomcat.
- The default value is <code>true</code>.</p>
+ webserver and used for authorization in Tomcat. Note that this principal
+ will have no roles associated with it.
+ The default value is <code>true</code>. If
+ <code>tomcatAuthorization</code> is set to <code>true</code> this
+ attribute has no effect.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">tomcatAuthorization</code></td><td align="left" valign="center">
+ <p>If set to <code>true</code>, the authenticated principal will be
+ propagated from the native webserver and considered already authenticated
+ in Tomcat. If the web application has one or more security constraints,
+ authorization will then be performed by Tomcat and roles assigned to the
+ authenticated principal. If the appropriate Tomcat Realm for the request
+ does not recognise the provided user name, a Principal will be still be
+ created but it will have no roles. The default value is
+ <code>false</code>.</p>
+ </td></tr></table>
+
+ </blockquote></td></tr></table>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Java TCP socket attributes"><!--()--></a><a name="Java_TCP_socket_attributes"><strong>Java TCP socket attributes</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The BIO and NIO implementation support the following Java TCP socket
+ attributes in addition to the common Connector and HTTP attributes listed
+ above.</p>
+
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">socket.rxBufSize</code></td><td align="left" valign="center">
+ <p>(int)The socket receive buffer (SO_RCVBUF) size in bytes. JVM default
+ used if not set.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.txBufSize</code></td><td align="left" valign="center">
+ <p>(int)The socket send buffer (SO_SNDBUF) size in bytes. JVM default
+ used if not set.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.tcpNoDelay</code></td><td align="left" valign="center">
+ <p>(bool)This is equivalent to standard attribute
+ <strong>tcpNoDelay</strong>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soKeepAlive</code></td><td align="left" valign="center">
+ <p>(bool)Boolean value for the socket's keep alive setting
+ (SO_KEEPALIVE). JVM default used if not set.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.ooBInline</code></td><td align="left" valign="center">
+ <p>(bool)Boolean value for the socket OOBINLINE setting. JVM default
+ used if not set.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soReuseAddress</code></td><td align="left" valign="center">
+ <p>(bool)Boolean value for the sockets reuse address option
+ (SO_REUSEADDR). JVM default used if not set.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soLingerOn</code></td><td align="left" valign="center">
+ <p>(bool)Boolean value for the sockets so linger option (SO_LINGER).
+ A value for the standard attribute <strong>connectionLinger</strong>
+ that is >=0 is equivalent to setting this to <code>true</code>.
+ A value for the standard attribute <strong>connectionLinger</strong>
+ that is <0 is equivalent to setting this to <code>false</code>.
+ Both this attribute and <code>soLingerTime</code> must be set else the
+ JVM defaults will be used for both.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soLingerTime</code></td><td align="left" valign="center">
+ <p>(int)Value in seconds for the sockets so linger option (SO_LINGER).
+ This is equivalent to standard attribute
+ <strong>connectionLinger</strong>.
+ Both this attribute and <code>soLingerOn</code> must be set else the
+ JVM defaults will be used for both.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soTimeout</code></td><td align="left" valign="center">
+ <p>This is equivalent to standard attribute
+ <strong>connectionTimeout</strong>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceConnectionTime</code></td><td align="left" valign="center">
+ <p>(int)The first value for the performance settings. See
+ <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+ All three performance attributes must be set else the JVM defaults will
+ be used for all three.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceLatency</code></td><td align="left" valign="center">
+ <p>(int)The second value for the performance settings. See
+ <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+ All three performance attributes must be set else the JVM defaults will
+ be used for all three.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceBandwidth</code></td><td align="left" valign="center">
+ <p>(int)The third value for the performance settings. See
+ <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+ All three performance attributes must be set else the JVM defaults will
+ be used for all three.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.unlockTimeout</code></td><td align="left" valign="center">
+ <p>(int) The timeout for a socket unlock. When a connector is stopped, it will try to release the acceptor thread by opening a connector to itself.
+ The default value is <code>250</code> and the value is in milliseconds</p>
+ </td></tr></table>
+ </blockquote></td></tr></table>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="NIO specific configuration"><!--()--></a><a name="NIO_specific_configuration"><strong>NIO specific configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The following attributes are specific to the NIO connector.</p>
+
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">socket.directBuffer</code></td><td align="left" valign="center">
+ <p>(bool)Boolean value, whether to use direct ByteBuffers or java mapped
+ ByteBuffers. Default is <code>false</code>.<br>
+ When you are using direct buffers, make sure you allocate the
+ appropriate amount of memory for the direct memory space. On Sun's JDK
+ that would be something like <code>-XX:MaxDirectMemorySize=256m</code>.
+ </p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.appReadBufSize</code></td><td align="left" valign="center">
+ <p>(int)Each connection that is opened up in Tomcat get associated with
+ a read ByteBuffer. This attribute controls the size of this buffer. By
+ default this read buffer is sized at <code>8192</code> bytes. For lower
+ concurrency, you can increase this to buffer more data. For an extreme
+ amount of keep alive connections, decrease this number or increase your
+ heap size.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.appWriteBufSize</code></td><td align="left" valign="center">
+ <p>(int)Each connection that is opened up in Tomcat get associated with
+ a write ByteBuffer. This attribute controls the size of this buffer. By
+ default this write buffer is sized at <code>8192</code> bytes. For low
+ concurrency you can increase this to buffer more response data. For an
+ extreme amount of keep alive connections, decrease this number or
+ increase your heap size.<br>
+ The default value here is pretty low, you should up it if you are not
+ dealing with tens of thousands concurrent connections.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.bufferPool</code></td><td align="left" valign="center">
+ <p>(int)The NIO connector uses a class called NioChannel that holds
+ elements linked to a socket. To reduce garbage collection, the NIO
+ connector caches these channel objects. This value specifies the size of
+ this cache. The default value is <code>500</code>, and represents that
+ the cache will hold 500 NioChannel objects. Other values are
+ <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.bufferPoolSize</code></td><td align="left" valign="center">
+ <p>(int)The NioChannel pool can also be size based, not used object
+ based. The size is calculated as follows:<br>
+ NioChannel
+ <code>buffer size = read buffer size + write buffer size</code><br>
+ SecureNioChannel <code>buffer size = application read buffer size +
+ application write buffer size + network read buffer size +
+ network write buffer size</code><br>
+ The value is in bytes, the default value is <code>1024*1024*100</code>
+ (100MB).</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.processorCache</code></td><td align="left" valign="center">
+ <p>(int)Tomcat will cache SocketProcessor objects to reduce garbage
+ collection. The integer value specifies how many objects to keep in the
+ cache at most. The default is <code>500</code>. Other values are
+ <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.keyCache</code></td><td align="left" valign="center">
+ <p>(int)Tomcat will cache KeyAttachment objects to reduce garbage
+ collection. The integer value specifies how many objects to keep in the
+ cache at most. The default is <code>500</code>. Other values are
+ <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.eventCache</code></td><td align="left" valign="center">
+ <p>(int)Tomcat will cache PollerEvent objects to reduce garbage
+ collection. The integer value specifies how many objects to keep in the
+ cache at most. The default is <code>500</code>. Other values are
+ <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">selectorPool.maxSelectors</code></td><td align="left" valign="center">
+ <p>(int)The max selectors to be used in the pool, to reduce selector
+ contention. Use this option when the command line
+ <code>org.apache.tomcat.util.net.NioSelectorShared</code> value is set
+ to false. Default value is <code>200</code>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">selectorPool.maxSpareSelectors</code></td><td align="left" valign="center">
+ <p>(int)The max spare selectors to be used in the pool, to reduce
+ selector contention. When a selector is returned to the pool, the system
+ can decide to keep it or let it be GC'd. Use this option when the
+ command line <code>org.apache.tomcat.util.net.NioSelectorShared</code>
+ value is set to false. Default value is <code>-1</code> (unlimited).</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">command-line-options</code></td><td align="left" valign="center">
+ <p>The following command line options are available for the NIO
+ connector:<br>
+ <code>-Dorg.apache.tomcat.util.net.NioSelectorShared=true|false</code>
+ - default is <code>true</code>. Set this value to <code>false</code> if you wish to
+ use a selector for each thread. When you set it to <code>false</code>, you can
+ control the size of the pool of selectors by using the
+ <strong>selectorPool.maxSelectors</strong> attribute.</p>
+ </td></tr></table>
+ </blockquote></td></tr></table>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="APR/native specific configuration"><!--()--></a><a name="APR/native_specific_configuration"><strong>APR/native specific configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The APR/native implementation supports the following attributes in
+ addition to the common Connector and AJP attributes listed above.</p>
+
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">pollTime</code></td><td align="left" valign="center">
+ <p>Duration of a poll call in microseconds. Lowering this value will
+ slightly decrease latency of connections being kept alive in some cases
+ , but will use more CPU as more poll calls are being made. The default
+ value is 2000 (2ms).
+ </p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">pollerSize</code></td><td align="left" valign="center">
+ <p>Amount of sockets that the poller responsible for polling kept alive
+ connections can hold at a given time. Extra connections will be closed
+ right away. The default value is 8192, corresponding to 8192 keep-alive
+ connections.</p>
</td></tr></table>
</blockquote></td></tr></table>
@@ -276,6 +606,70 @@
<p>None at this time.</p>
-</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>
- Copyright © 1999-2014, Apache Software Foundation
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Special Features"><!--()--></a><a name="Special_Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Proxy Support"><!--()--></a><a name="Proxy_Support"><strong>Proxy Support</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The <code>proxyName</code> and <code>proxyPort</code> attributes can
+ be used when Tomcat is run behind a proxy server. These attributes
+ modify the values returned to web applications that call the
+ <code>request.getServerName()</code> and <code>request.getServerPort()</code>
+ methods, which are often used to construct absolute URLs for redirects.
+ Without configuring these attributes, the values returned would reflect
+ the server name and port on which the connection from the proxy server
+ was received, rather than the server name and port to whom the client
+ directed the original request.</p>
+
+ <p>For more information, see the
+ <a href="../proxy-howto.html">Proxy Support HOW-TO</a>.</p>
+
+ </blockquote></td></tr></table>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Connector Comparison"><!--()--></a><a name="Connector_Comparison"><strong>Connector Comparison</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>Below is a small chart that shows how the connectors differ.</p>
+ <div class="codeBox"><pre><code>
+ Java Blocking Connector Java Nio Blocking Connector APR/native Connector
+ BIO NIO APR
+ Classname AjpProtocol AjpNioProtocol AjpAprProtocol
+ Tomcat Version 3.x onwards 7.x onwards 5.5.x onwards
+ Support Polling NO YES YES
+ Polling Size N/A maxConnections maxConnections
+ Read Request Headers Blocking Blocking Blocking
+ Read Request Body Blocking Blocking Blocking
+ Write Response Blocking Blocking Blocking
+ Wait for next Request Blocking Non Blocking Non Blocking
+ Max Connections maxConnections maxConnections maxConnections
+
+ </code></pre></div>
+
+ </blockquote></td></tr></table>
+
+</blockquote></td></tr></table></td></tr><tr class="noPrint"><td width="20%" valign="top" nowrap class="noPrint"></td><td width="80%" valign="top" align="left"><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="comments_section" id="comments_section"><strong>Comments</strong></a></font></td></tr><tr><td><blockquote><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
+ on improving documentation for Apache Tomcat.<br><br>
+ If you have trouble and need help, read
+ <a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
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