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| 771 | blopes | 1 | <!DOCTYPE html SYSTEM "about:legacy-compat"> |
| 2 | <html lang="en"><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><link href="./images/docs-stylesheet.css" rel="stylesheet" type="text/css"><title>Apache Tomcat 9 (9.0.112) - Connectors How To</title></head><body><div id="wrapper"><header><div id="header"><div><div><div class="logo noPrint"><a href="https://tomcat.apache.org/"><img alt="Tomcat Home" src="./images/tomcat.png"></a></div><div style="height: 1px;"></div><div class="asfLogo noPrint"><a href="https://www.apache.org/" target="_blank"><img src="./images/asf-logo.svg" alt="The Apache Software Foundation" style="width: 266px; height: 83px;"></a></div><h1>Apache Tomcat 9</h1><div class="versionInfo"> |
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| 3 | Version 9.0.112, |
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| 4 | <time datetime="2025-11-06">Nov 6 2025</time></div><div style="height: 1px;"></div><div style="clear: left;"></div></div></div></div></header><div id="middle"><div><div id="mainLeft" class="noprint"><div><nav><div><h2>Links</h2><ul><li><a href="index.html">Docs Home</a></li><li><a href="https://cwiki.apache.org/confluence/display/TOMCAT/FAQ">FAQ</a></li></ul></div><div><h2>User Guide</h2><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="host-manager-howto.html">6) Host Manager</a></li><li><a href="realm-howto.html">7) Realms and AAA</a></li><li><a href="security-manager-howto.html">8) Security Manager</a></li><li><a href="jndi-resources-howto.html">9) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">10) JDBC DataSources</a></li><li><a href="class-loader-howto.html">11) Classloading</a></li><li><a href="jasper-howto.html">12) JSPs</a></li><li><a href="ssl-howto.html">13) SSL/TLS</a></li><li><a href="ssi-howto.html">14) SSI</a></li><li><a href="cgi-howto.html">15) CGI</a></li><li><a href="proxy-howto.html">16) Proxy Support</a></li><li><a href="mbeans-descriptors-howto.html">17) MBeans Descriptors</a></li><li><a href="default-servlet.html">18) Default Servlet</a></li><li><a href="cluster-howto.html">19) Clustering</a></li><li><a href="balancer-howto.html">20) Load Balancer</a></li><li><a href="connectors.html">21) Connectors</a></li><li><a href="monitoring.html">22) Monitoring and Management</a></li><li><a href="logging.html">23) Logging</a></li><li><a href="apr.html">24) APR/Native</a></li><li><a href="virtual-hosting-howto.html">25) Virtual Hosting</a></li><li><a href="aio.html">26) Advanced IO</a></li><li><a href="maven-jars.html">27) Mavenized</a></li><li><a href="security-howto.html">28) Security Considerations</a></li><li><a href="windows-service-howto.html">29) Windows Service</a></li><li><a href="windows-auth-howto.html">30) Windows Authentication</a></li><li><a href="jdbc-pool.html">31) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">32) WebSocket</a></li><li><a href="rewrite.html">33) Rewrite</a></li><li><a href="cdi.html">34) CDI 2 and JAX-RS</a></li><li><a href="graal.html">35) AOT/GraalVM Support</a></li></ul></div><div><h2>Reference</h2><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Tomcat Javadocs</a></li><li><a href="servletapi/index.html">Servlet 4.0 Javadocs</a></li><li><a href="jspapi/index.html">JSP 2.3 Javadocs</a></li><li><a href="elapi/index.html">EL 3.0 Javadocs</a></li><li><a href="websocketapi/index.html">WebSocket 1.1 Javadocs</a></li><li><a href="jaspicapi/index.html">JASPIC 1.1 Javadocs</a></li><li><a href="annotationapi/index.html">Common Annotations 1.3 Javadocs</a></li><li><a href="https://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul></div><div><h2>Apache Tomcat Development</h2><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="https://cwiki.apache.org/confluence/display/TOMCAT/Tomcat+Versions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="tribes/introduction.html">Tribes</a></li></ul></div></nav></div></div><div id="mainRight"><div id="content"><h2>Connectors How To</h2><h3 id="Table_of_Contents">Table of Contents</h3><div class="text"> |
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| 5 | <ul><li><a href="#Introduction">Introduction</a></li><li><a href="#HTTP">HTTP</a></li><li><a href="#AJP">AJP</a></li></ul> |
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| 6 | </div><h3 id="Introduction">Introduction</h3><div class="text"> |
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| 7 | |||
| 8 | <p>Choosing a connector to use with Tomcat can be difficult. This page will |
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| 9 | list the connectors which are supported with this Tomcat release, and will |
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| 10 | hopefully help you make the right choice according to your needs.</p> |
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| 11 | |||
| 12 | </div><h3 id="HTTP">HTTP</h3><div class="text"> |
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| 13 | |||
| 14 | <p>The HTTP connector is setup by default with Tomcat, and is ready to use. This |
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| 15 | connector features the lowest latency and best overall performance.</p> |
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| 16 | |||
| 17 | <p>For clustering, an HTTP load balancer <b>with support for web sessions stickiness</b> |
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| 18 | must be installed to direct the traffic to the Tomcat servers. Tomcat supports mod_proxy |
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| 19 | (on Apache HTTP Server 2.x, and included by default in Apache HTTP Server 2.2) as the load balancer. |
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| 20 | It should be noted that the performance of HTTP proxying is usually lower than the |
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| 21 | performance of AJP, so AJP clustering is often preferable.</p> |
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| 22 | |||
| 23 | </div><h3 id="AJP">AJP</h3><div class="text"> |
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| 24 | |||
| 25 | <p>When using a single server, the performance when using a native webserver in |
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| 26 | front of the Tomcat instance is most of the time significantly worse than a |
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| 27 | standalone Tomcat with its default HTTP connector, even if a large part of the web |
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| 28 | application is made of static files. If integration with the native webserver is |
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| 29 | needed for any reason, an AJP connector will provide faster performance than |
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| 30 | proxied HTTP. AJP clustering is the most efficient from the Tomcat perspective. |
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| 31 | It is otherwise functionally equivalent to HTTP clustering.</p> |
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| 32 | |||
| 33 | <p>The native connectors supported with this Tomcat release are:</p> |
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| 34 | <ul> |
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| 35 | <li>JK 1.2.x with any of the supported servers</li> |
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| 36 | <li>mod_proxy on Apache HTTP Server 2.x (included by default in Apache HTTP Server 2.2), |
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| 37 | with AJP enabled</li> |
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| 38 | </ul> |
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| 39 | |||
| 40 | <p><b>Other native connectors supporting AJP may work, but are no longer supported.</b></p> |
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| 41 | |||
| 42 | </div></div></div></div></div><footer><div id="footer"> |
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| 43 | Copyright © 1999-2025, The Apache Software Foundation |
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| 44 | <br> |
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| 45 | Apache Tomcat, Tomcat, Apache, the Apache Tomcat logo and the Apache logo |
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| 46 | are either registered trademarks or trademarks of the Apache Software |
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| 47 | Foundation. |
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| 48 | </div></footer></div></body></html> |