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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 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>System Properties</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="#Property_replacements">Property replacements</a></li><li><a href="#Clustering">Clustering</a></li><li><a href="#Expression_Language">Expression Language</a></li><li><a href="#Jasper">Jasper</a></li><li><a href="#Security">Security</a></li><li><a href="#Specification">Specification</a></li><li><a href="#Sessions">Sessions</a></li><li><a href="#Logging">Logging</a></li><li><a href="#JAR_Scanning">JAR Scanning</a></li><li><a href="#Websockets">Websockets</a></li><li><a href="#Other">Other</a></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 following sections list the system properties that may be set to modify | |
| the default Tomcat behaviour.</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="Property replacements"><!--()--></a><a name="Property_replacements"><strong>Property replacements</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.digester. PROPERTY_SOURCE</code></td><td align="left" valign="center"> | |
| <p>Set this to a fully qualified name of a class that implements | |
| <code>org.apache.tomcat.util.IntrospectionUtils.PropertySource</code>. | |
| Required to have a public constructor with no arguments.</p> | |
| <p>Use this to add a property source, that will be invoked when <code>${parameter}</code> | |
| denoted parameters are found in the XML files that Tomcat parses.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Clustering"><strong>Clustering</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina. tribes.dns_lookups</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the clustering module will attempt to use DNS to | |
| resolve any host names provided in the cluster configuration.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Expression Language"><!--()--></a><a name="Expression_Language"><strong>Expression Language</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.el.BeanELResolver. CACHE_SIZE</code></td><td align="left" valign="center"> | |
| <p>The number of javax.el.BeanELResolver.BeanProperties objects that will | |
| be cached by the EL Parser.</p> | |
| <p>If not specified, the default of <code>1000</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.el.ExpressionBuilder. CACHE_SIZE</code></td><td align="left" valign="center"> | |
| <p>The number of parsed EL expressions that will be cached by the EL | |
| Parser.</p> | |
| <p>If not specified, the default of <code>5000</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.el.parser. COERCE_TO_ZERO</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, when coercing expressions to numbers | |
| <code>""</code> and <code>null</code> will be coerced to zero as required | |
| by the specification.</p> | |
| <p>If not specified, the default value of <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.el.parser. SKIP_IDENTIFIER_CHECK</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, when parsing expressions, identifiers will not be | |
| checked to ensure that they conform to the Java Language Specification for | |
| Java identifiers.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Jasper"><strong>Jasper</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Generator.POOL_TAGS_WITH_EXTENDS</code></td><td align="left" valign="center"> | |
| <p>By default, JSPs that use their own base class via the extends | |
| attribute of the page directive, will have Tag pooling disabled since | |
| Jasper cannot guarantee that the necessary initialisation will have taken | |
| place. This can have a negative impact on performance. Providing the | |
| alternative base class calls _jspInit() from Servlet.init(), setting this | |
| property to <code>true</code> will enable pooling with an alternative base | |
| class. If the alternative base class does not call _jspInit() and this | |
| property is <code>true</code>, NPEs will occur when attempting to use | |
| tags.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used. | |
| </p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Generator.STRICT_GET_PROPERTY</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the requirement to have the object referenced in | |
| <code>jsp:getProperty</code> action to be previously "introduced" | |
| to the JSP processor, as specified in the chapter JSP.5.3 of JSP 2.0 and | |
| later specifications, is enforced.</p> | |
| <p>If not specified, the specification compliant default of | |
| <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Generator.VAR_EXPRESSIONFACTORY</code></td><td align="left" valign="center"> | |
| <p>The name of the variable to use for the expression language expression | |
| factory.</p> | |
| <p>If not specified, the default value of <code>_el_expressionfactory</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Generator.VAR_INSTANCEMANAGER</code></td><td align="left" valign="center"> | |
| <p>The name of the variable to use for the instance manager factory.</p> | |
| <p>If not specified, the default value of <code>_jsp_instancemanager</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Parser.STRICT_QUOTE_ESCAPING</code></td><td align="left" valign="center"> | |
| <p>If <code>false</code> the requirements for escaping quotes in JSP | |
| attributes will be relaxed so that an unescaped quote will not | |
| cause an error.</p> | |
| <p>If not specified, the specification compliant default of | |
| <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.compiler. Parser.STRICT_WHITESPACE</code></td><td align="left" valign="center"> | |
| <p>If <code>false</code> the requirements for whitespace before an | |
| attribute name will be relaxed so that the lack of whitespace will not | |
| cause an error.</p> | |
| <p>If not specified, the specification compliant default of | |
| <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.runtime. BodyContentImpl.LIMIT_BUFFER</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, any tag buffer that expands beyond | |
| <code>org.apache.jasper.Constants.DEFAULT_TAG_BUFFER_SIZE</code> will be | |
| destroyed and a new buffer created of the default size.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.runtime. JspFactoryImpl.USE_POOL</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, a ThreadLocal <code>PageContext</code> pool will | |
| be used.</p> | |
| <p>If not specified, the default value of <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.runtime. JspFactoryImpl.POOL_SIZE</code></td><td align="left" valign="center"> | |
| <p>The size of the ThreadLocal <code>PageContext</code>.</p> | |
| <p>If not specified, the default value of <code>8</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. JSP_SERVLET_BASE</code></td><td align="left" valign="center"> | |
| <p>The base class of the Servlets generated from the JSPs.</p> | |
| <p>If not specified, the default value of | |
| <code>org.apache.jasper.runtime.HttpJspBase</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. SERVICE_METHOD_NAME</code></td><td align="left" valign="center"> | |
| <p>The name of the service method called by the base class.</p> | |
| <p>If not specified, the default value of <code>_jspService</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. SERVLET_CLASSPATH</code></td><td align="left" valign="center"> | |
| <p>The name of the ServletContext attribute that provides the classpath | |
| for the JSP.</p> | |
| <p>If not specified, the default value of | |
| <code>org.apache.catalina.jsp_classpath</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. JSP_FILE</code></td><td align="left" valign="center"> | |
| <p>The name of the request attribute for <code><jsp-file></code> | |
| element of a servlet definition. If present on a request, this overrides | |
| the value returned by <code>request.getServletPath()</code> to select the | |
| JSP page to be executed.</p> | |
| <p>If not specified, the default value of | |
| <code>org.apache.catalina.jsp_file</code> will be used.</p> | |
| <p><strong>Deprecated:</strong> This will be removed in Tomcat 9.0.x | |
| onwards. It is replaced by the use of the jspFile servlet initialisation | |
| parameter</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. PRECOMPILE</code></td><td align="left" valign="center"> | |
| <p>The name of the query parameter that causes the JSP engine to just | |
| pregenerate the servlet but not invoke it.</p> | |
| <p>If not specified, the default value of <code>jsp_precompile</code> | |
| will be used, as defined by JSP specification (JSP.11.4.2).</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. JSP_PACKAGE_NAME</code></td><td align="left" valign="center"> | |
| <p>The default package name for compiled jsp pages.</p> | |
| <p>If not specified, the default value of <code>org.apache.jsp</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. TAG_FILE_PACKAGE_NAME</code></td><td align="left" valign="center"> | |
| <p>The default package name for tag handlers generated from tag files.</p> | |
| <p>If not specified, the default value of <code>org.apache.jsp.tag</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. ALT_DD_ATTR</code></td><td align="left" valign="center"> | |
| <p>The servlet context attribute under which the alternate deployment | |
| descriptor for this web application is stored.</p> | |
| <p>If not specified, the default value of | |
| <code>org.apache.catalina.deploy.alt_dd</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. TEMP_VARIABLE_NAME_PREFIX</code></td><td align="left" valign="center"> | |
| <p>Prefix to use for generated temporary variable names.</p> | |
| <p>If not specified, the default value of <code>_jspx_temp</code> | |
| will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.jasper.Constants. USE_INSTANCE_MANAGER_FOR_TAGS</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the instance manager is used to obtain tag | |
| handler instances.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Security"><strong>Security</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.connector. RECYCLE_FACADES</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> or if a security manager is in use a new | |
| facade object will be created for each request.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.connector. CoyoteAdapter.ALLOW_BACKSLASH</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> the '\' character will be permitted as a | |
| path delimiter.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.buf. UDecoder.ALLOW_ENCODED_SLASH</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> '%2F' and '%5C' will be permitted as path | |
| delimiters.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Specification"><strong>Specification</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina. STRICT_SERVLET_COMPLIANCE</code></td><td align="left" valign="center"> | |
| <p>The default value of this system property is <code>false</code>.</p> | |
| <p>If this is <code>true</code> the default values will be changed for:</p> | |
| <ul> | |
| <li><code>org.apache.catalina.core.<br>ApplicationContext.GET_RESOURCE_REQUIRE_SLASH</code></li> | |
| <li><code>org.apache.catalina.core.<br>ApplicationDispatcher.WRAP_SAME_OBJECT</code></li> | |
| <li><code>org.apache.catalina.core.<br>StandardHostValve.ACCESS_SESSION</code></li> | |
| <li><code>org.apache.catalina.session.<br>StandardSession.ACTIVITY_CHECK</code></li> | |
| <li><code>org.apache.catalina.session.<br>StandardSession.LAST_ACCESS_AT_START</code></li> | |
| <li><code>org.apache.tomcat.util.http.<br>ServerCookie.ALWAYS_ADD_EXPIRES</code></li> | |
| <li><code>org.apache.tomcat.util.http.<br>ServerCookie.FWD_SLASH_IS_SEPARATOR</code></li> | |
| <li><code>org.apache.tomcat.util.http.<br>ServerCookie.PRESERVE_COOKIE_HEADER</code></li> | |
| <li><code>org.apache.tomcat.util.http.<br>ServerCookie.STRICT_NAMING</code></li> | |
| <li>The <code>resourceOnlyServlets</code> attribute of any | |
| <a href="context.html">Context</a> element.</li> | |
| <li>The <code>tldValidation</code> attribute of any | |
| <a href="context.html">Context</a> element.</li> | |
| <li>The <code>useRelativeRedirects</code> attribute of any | |
| <a href="context.html">Context</a> element.</li> | |
| <li>The <code>xmlNamespaceAware</code> attribute of any | |
| <a href="context.html">Context</a> element.</li> | |
| <li>The <code>xmlValidation</code> attribute of any | |
| <a href="context.html">Context</a> element.</li> | |
| </ul> | |
| <p>Note that changing a number of the above defaults is likely to break | |
| the majority of systems as some browsers are unable to correctly handle | |
| the cookie headers that result from a strict adherence to the | |
| specifications. Defaults, regardless of whether or not they have been | |
| changed by setting | |
| <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> can always be | |
| overridden by explicitly setting the appropriate system property or element | |
| attribute.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.connector. Response.ENFORCE_ENCODING_IN_GET_WRITER</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> then | |
| a call to <code>Response.getWriter()</code> if no character encoding | |
| has been specified will result in subsequent calls to | |
| <code>Response.getCharacterEncoding()</code> returning | |
| <code>ISO-8859-1</code> and the <code>Content-Type</code> response header | |
| will include a <code>charset=ISO-8859-1</code> component. (SRV.15.2.22.1)</p> | |
| <p>If not specified, the default specification compliant value of | |
| <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.core.ApplicationContext .GET_RESOURCE_REQUIRE_SLASH</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> then the path passed to | |
| <code>ServletContext.getResource()</code> or | |
| <code>ServletContext.getResourceAsStream()</code> must start with | |
| "/". If <code>false</code>, code like | |
| <code>getResource("myfolder/myresource.txt")</code> will work.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.core. ApplicationDispatcher.WRAP_SAME_OBJECT</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> then any wrapped request or response | |
| object passed to an application dispatcher will be checked to ensure that | |
| it has wrapped the original request or response.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.ALLOW_EQUALS_IN_VALUE</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> Tomcat will allow '<code>=</code>' | |
| characters when parsing unquoted cookie values. If <code>false</code>, | |
| cookie values containing '<code>=</code>' will be terminated when the | |
| '<code>=</code>' is encountered and the remainder of the cookie value will | |
| be dropped.</p> | |
| <p>If not specified, the default value specification compliant value of | |
| <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.ALLOW_HTTP_SEPARATORS_IN_V0</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> Tomcat will allow HTTP separators in | |
| cookie names and values.</p> | |
| <p>If not specified, the default specification compliant value of | |
| <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.ALLOW_NAME_ONLY</code></td><td align="left" valign="center"> | |
| <p>If this is <code>false</code> then the requirements of the cookie | |
| specifications that cookies must have values will be enforced and cookies | |
| consisting only of a name but no value will be ignored.</p> | |
| <p>If not specified, the default specification compliant value of | |
| <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.ALWAYS_ADD_EXPIRES</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> Tomcat will always add an expires | |
| parameter to a SetCookie header even for cookies with version greater than | |
| zero. This is to work around a known IE6 and IE7 bug that causes IE to | |
| ignore the Max-Age parameter in a SetCookie header.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>false</code>, | |
| else the default value will be <code>true</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.FWD_SLASH_IS_SEPARATOR</code></td><td align="left" valign="center"> | |
| <p> If this is true then the <code>/</code> (forward slash) character will | |
| be treated as a separator. Note that this character is frequently used in | |
| cookie path attributes and some browsers will fail to process a cookie if | |
| the path attribute is quoted as is required by a strict adherence to the | |
| specifications. This is highly likely to break session tracking using | |
| cookies.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.PRESERVE_COOKIE_HEADER</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code> Tomcat will ensure that cookie | |
| processing does not modify cookie header returned by | |
| <code>HttpServletRequest.getHeader()</code>.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util.http. ServerCookie.STRICT_NAMING</code></td><td align="left" valign="center"> | |
| <p> If this is true then the requirements of the Servlet specification | |
| that Cookie names must adhere to RFC2109 (no use of separators) will be | |
| enforced.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Sessions"><strong>Sessions</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.authenticator. Constants.SSO_SESSION_COOKIE_NAME</code></td><td align="left" valign="center"> | |
| <p>An alternative name for the single sign on session cookie. Defaults to | |
| <code>JSESSIONIDSSO</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.core. StandardHostValve.ACCESS_SESSION</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code>, every request that is associated with a | |
| session will cause the session's last accessed time to be updated | |
| regardless of whether or not the request explicitly accesses the session.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.session. StandardSession.ACTIVITY_CHECK</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code>, Tomcat will track the number of active | |
| requests for each session. When determining if a session is valid, any | |
| session with at least one active request will always be considered valid.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.session. StandardSession.LAST_ACCESS_AT_START</code></td><td align="left" valign="center"> | |
| <p>If this is <code>true</code>, the last accessed time for sessions will | |
| be calculated from the beginning of the previous request. If | |
| <code>false</code>, the last accessed time for sessions will be calculated | |
| from the end of the previous request. This also affects how the idle time | |
| is calculated.</p> | |
| <p>If <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code> is set to | |
| <code>true</code>, the default of this setting will be <code>true</code>, | |
| else the default value will be <code>false</code>.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Logging"><strong>Logging</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli.formatter</code></td><td align="left" valign="center"> | |
| <p>If no logging configuration file is specified and no logging configuration class is specified | |
| using the <code>java.util.logging.config.class</code> and <code>java.util.logging.config.file</code> | |
| properties the default logging framework <code>org.apache.juli</code> will use the default | |
| <code>java.util.logging.SimpleFormatter</code> for all console output. | |
| To simply override the console output formatter, one can use the described property. Example: | |
| <code>-Dorg.apache.juli.formatter=org.apache.juli.OneLineFormatter</code></p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli. AsyncOverflowDropType</code></td><td align="left" valign="center"> | |
| <p>When the memory limit of records has been reached the system needs to determine what action to take. | |
| Currently there are three actions that can be taken: | |
| </p> | |
| <ul> | |
| <li><code>int OVERFLOW_DROP_LAST = 1</code> - the record that caused the overflow will be dropped and not logged</li> | |
| <li><code>int OVERFLOW_DROP_FIRST = 2</code> - the record that is next in line to be logged will be dropped to make room for the latest record on the queue</li> | |
| <li><code>int OVERFLOW_DROP_FLUSH = 3</code> - suspend the thread while the queue empties out and flushes the entries to the write buffer</li> | |
| <li><code>int OVERFLOW_DROP_CURRENT = 4</code> - drop the current log entry</li> | |
| </ul> | |
| <p>The default value is <code>1</code> (OVERFLOW_DROP_LAST).</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli. AsyncMaxRecordCount</code></td><td align="left" valign="center"> | |
| <p>The max number of log records that the async logger will keep in memory. When this limit is reached and a new record is being logged by the | |
| JULI framework the system will take an action based on the <code>org.apache.juli.AsyncOverflowDropType</code> setting.</p> | |
| <p>The default value is <code>10000</code> records. | |
| This number represents the global number of records, not on a per handler basis. | |
| </p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli. AsyncLoggerPollInterval</code></td><td align="left" valign="center"> | |
| <p>The poll interval in milliseconds for the asynchronous logger thread in milliseconds. | |
| If the log queue is empty, the async thread will issue a poll(poll interval) | |
| in order to not wake up too often.</p> | |
| <p>The default value is <code>1000</code> milliseconds.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli.logging. UserDataHelper.CONFIG</code></td><td align="left" valign="center"> | |
| <p>The type of logging to use for errors generated by invalid input data. | |
| The options are: <code>DEBUG_ALL</code>, <code>INFO_THEN_DEBUG</code>, | |
| <code>INFO_ALL</code> and <code>NONE</code>. When | |
| <code>INFO_THEN_DEBUG</code> is used, the period for which errors are | |
| logged at DEBUG rather than INFO is controlled by the system property | |
| <code>org.apache.juli.logging.UserDataHelper.SUPPRESSION_TIME</code>. | |
| </p> | |
| <p>The default value is <code>INFO_THEN_DEBUG</code>.</p> | |
| <p>The errors currently logged using this system are:</p> | |
| <ul> | |
| <li>invalid cookies;</li> | |
| <li>invalid parameters;</li> | |
| <li>too many headers, too many parameters (hitting | |
| <code>maxHeaderCount</code> or <code>maxParameterCount</code> limits | |
| of a <a href="http.html">connector</a>).</li> | |
| </ul> | |
| <p>Other errors triggered by invalid input data may be added to this | |
| system in later versions.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.juli.logging. UserDataHelper.SUPPRESSION_TIME</code></td><td align="left" valign="center"> | |
| <p>When using <code>INFO_THEN_DEBUG</code> for | |
| <code>org.apache.juli.logging.UserDataHelper.CONFIG</code> this system | |
| property controls how long messages are logged at DEBUG after a message | |
| has been logged at INFO. Once this period has elapsed, the next message | |
| will be logged at INFO followed by a new suppression period where | |
| messages are logged at DEBUG and so on. The value is measured | |
| in seconds.</p> | |
| <p>A value of <code>0</code> is equivalent to using <code>INFO_ALL</code> | |
| for <code>org.apache.juli.logging.UserDataHelper.CONFIG</code>.</p> | |
| <p>A negative value means an infinite suppression period.</p> | |
| <p>The default value is <code>86400</code> (24 hours).</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="JAR Scanning"><!--()--></a><a name="JAR_Scanning"><strong>JAR Scanning</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.scan. DefaultJarScanner.jarsToSkip</code></td><td align="left" valign="center"> | |
| <p>The comma-separated list of file name patterns of JARs that Tomcat will | |
| not scan for configuration information when using the | |
| <a href="jar-scanner.html">JarScanner</a> functionality. The file name | |
| pattern syntax is described in | |
| <a href="jar-scanner.html">JarScanner</a> documentation. Note that | |
| there are additional system properties that enable JARs to be excluded | |
| from specific scans rather than all scans.</p> | |
| <p>The coded default is that no JARs are skipped however the system | |
| property is set in a default Tomcat installation via the | |
| <code>$CATALINA_BASE/conf/catalina.properties</code> file.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.startup. ContextConfig.jarsToSkip</code></td><td align="left" valign="center"> | |
| <p>The comma-separated list of additional filenames of JARs that Tomcat | |
| will not scan for Servlet 3.0 pluggability features.</p> | |
| <p>The coded default is that no JARs are skipped however the system | |
| property is set in a default Tomcat installation via the | |
| <code>$CATALINA_BASE/conf/catalina.properties</code> file.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.startup. TldConfig.jarsToSkip</code></td><td align="left" valign="center"> | |
| <p>The comma-separated list of additional filenames of JARs that Tomcat | |
| will not scan for TLDs.</p> | |
| <p>The coded default is that no JARs are skipped however the system | |
| property is set in a default Tomcat installation via the | |
| <code>$CATALINA_BASE/conf/catalina.properties</code> file.</p> | |
| </td></tr></table> | |
| </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Websockets"><strong>Websockets</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat .websocket.ALLOW_UNSUPPORTED_EXTENSIONS</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, allow unknown extensions to be declared by | |
| the user.</p> | |
| <p>The default value is <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat. websocket.DEFAULT_ORIGIN_HEADER_VALUE</code></td><td align="left" valign="center"> | |
| <p>Default value of the origin header that will be sent by the client | |
| during the upgrade handshake.</p> | |
| <p>The default is null so that no origin header is sent.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat. websocket.DEFAULT_PROCESS_PERIOD</code></td><td align="left" valign="center"> | |
| <p>The number of periodic ticks between periodic processing which | |
| involves in particular session expiration checks.</p> | |
| <p>The default value is <code>10</code> which corresponds to 10 | |
| seconds.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat. websocket.DISABLE_BUILTIN_EXTENSIONS</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, disable all built-in extensions provided by the | |
| server, such as message compression.</p> | |
| <p>The default value is <code>false</code>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat. websocket.STREAMS_DROP_EMPTY_MESSAGES</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, streams provided to the user (writer and output | |
| stream) will not send an empty message when flushing and there is no | |
| data to flush, or when it is closed without having been used (for | |
| example if an error occurs).</p> | |
| <p>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="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Other"><strong>Other</strong></a></font></td></tr><tr><td><blockquote> | |
| <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Property</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.coyote. USE_CUSTOM_STATUS_MSG_IN_HEADER</code></td><td align="left" valign="center"><p>If this is | |
| <code>true</code>, custom HTTP status messages will be used within HTTP | |
| headers. If a custom message is specified that is not valid for use in an | |
| HTTP header (as defined by RFC2616) then the custom message will be | |
| ignored and the default message used.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">catalina.useNaming</code></td><td align="left" valign="center"> | |
| <p>If this is <code>false</code> it will override the | |
| <code>useNaming</code> attribute for all <a href="context.html"> | |
| Context</a> elements.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">javax.sql.DataSource.Factory</code></td><td align="left" valign="center"> | |
| <p>The class name of the factory to use to create resources of type | |
| <code>javax.sql.DataSource</code>. If not specified the default of | |
| <code>org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory</code> is used | |
| which is a package renamed (to avoid conflicts) copy of | |
| <a href="http://commons.apache.org/dbcp">Apache Commons DBCP</a>.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">javax.mail.Session.Factory</code></td><td align="left" valign="center"> | |
| <p>The class name of the factory to use to create resources of type | |
| <code>javax.mail.Session</code>. If not specified the default of | |
| <code>org.apache.naming.factory.MailSessionFactory</code> is used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">jvmRoute</code></td><td align="left" valign="center"> | |
| <p>Provides a default value for the <code>jvmRoute</code> attribute of the | |
| <a href="engine.html">Engine</a> element. It does not override the value | |
| configured on the <a href="engine.html">Engine</a> element.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">catalina.config</code></td><td align="left" valign="center"> | |
| <p>The URL for the catalina.properties configuration file.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.buf.StringCache.byte.enabled</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the String cache is enabled for | |
| <code>ByteChunk</code>.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.buf.StringCache.char.enabled</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the String cache is enabled for | |
| <code>CharChunk</code>.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.buf.StringCache.trainThreshold</code></td><td align="left" valign="center"> | |
| <p>The number of times <code>toString()</code> must be called before the | |
| cache is activated.</p> | |
| <p>If not specified, the default value of <code>20000</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.buf.StringCache.cacheSize</code></td><td align="left" valign="center"> | |
| <p>The size of the String cache.</p> | |
| <p>If not specified, the default value of <code>200</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.buf.StringCache.maxStringSize</code></td><td align="left" valign="center"> | |
| <p>The maximum length of String that will be cached.</p> | |
| <p>If not specified, the default value of <code>128</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util. http.FastHttpDateFormat.CACHE_SIZE</code></td><td align="left" valign="center"> | |
| <p>The size of the cache to use parsed and formatted date value.</p> | |
| <p>If not specified, the default value of <code>1000</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.tomcat.util. net.NioSelectorShared</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, use a shared selector for servlet write/read.</p> | |
| <p>If not specified, the default value of <code>true</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.startup. EXIT_ON_INIT_FAILURE</code></td><td align="left" valign="center"> | |
| <p>If <code>true</code>, the server will exit if an exception happens | |
| during the server initialization phase.</p> | |
| <p>If not specified, the default value of <code>false</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">org.apache.catalina.startup. RealmRuleSet.MAX_NESTED_REALM_LEVELS</code></td><td align="left" valign="center"> | |
| <p>The CombinedRealm allows nested Realms. This property controls the | |
| maximum permitted number of levels of nesting.</p> | |
| <p>If not specified, the default value of <code>3</code> will be used.</p> | |
| </td></tr><tr><td align="left" valign="center"><code class="propertyName">tomcat.util.http.parser.HttpParser. requestTargetAllow</code></td><td align="left" valign="center"> | |
| <p>A string comprised of characters the server should allow even when they are not encoded. | |
| These characters would normally result in a 400 status.</p> | |
| <p>The acceptable characters for this property are: <code>|</code>, <code>{</code> | |
| , and <code>}</code></p> | |
| <p><strong>WARNING</strong>: Use of this option will expose the server to CVE-2016-6816. | |
| </p> | |
| <p>If not specified, the default value of <code>null</code> will be used.</p> | |
| </td></tr></table> | |
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