Author: markt Date: Wed Aug 31 09:23:22 2016 New Revision: 1758560 URL: http://svn.apache.org/viewvc?rev=1758560&view=rev Log: The latest Java 9 early access builds have fixed some more memory leaks. Also disable protection that is fixed in Java 8 when running on Java 8
Modified: tomcat/tc8.5.x/trunk/ (props changed) tomcat/tc8.5.x/trunk/java/org/apache/catalina/core/JreMemoryLeakPreventionListener.java tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml Propchange: tomcat/tc8.5.x/trunk/ ------------------------------------------------------------------------------ --- svn:mergeinfo (original) +++ svn:mergeinfo Wed Aug 31 09:23:22 2016 @@ -1 +1 @@ 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09:23:22 2016 @@ -37,6 +37,7 @@ import org.apache.catalina.LifecycleList import org.apache.juli.logging.Log; import org.apache.juli.logging.LogFactory; import org.apache.tomcat.util.ExceptionUtils; +import org.apache.tomcat.util.compat.JreCompat; import org.apache.tomcat.util.compat.JreVendor; import org.apache.tomcat.util.res.StringManager; import org.w3c.dom.Document; @@ -258,13 +259,13 @@ public class JreMemoryLeakPreventionList // Trigger a call to sun.awt.AppContext.getAppContext(). This // will pin the system class loader in memory but that shouldn't // be an issue. - if (appContextProtection) { + if (appContextProtection && !JreCompat.isJre8Available()) { ImageIO.getCacheDirectory(); } // Trigger the creation of the AWT (AWT-Windows, AWT-XAWT, // etc.) thread - if (awtThreadProtection) { + if (awtThreadProtection && !JreCompat.isJre9Available()) { java.awt.Toolkit.getDefaultToolkit(); } @@ -281,7 +282,7 @@ public class JreMemoryLeakPreventionList * to terminate * */ - if (gcDaemonProtection) { + if (gcDaemonProtection && !JreCompat.isJre9Available()) { try { Class<?> clazz = Class.forName("sun.misc.GC"); Method method = clazz.getDeclaredMethod( @@ -311,7 +312,7 @@ public class JreMemoryLeakPreventionList * Calling getPolicy retains a static reference to the context * class loader. */ - if (securityPolicyProtection) { + if (securityPolicyProtection && !JreCompat.isJre8Available()) { try { // Policy.getPolicy(); Class<?> policyClass = Class @@ -344,7 +345,7 @@ public class JreMemoryLeakPreventionList * Initializing javax.security.auth.login.Configuration retains a static reference to the context * class loader. */ - if (securityLoginConfigurationProtection) { + if (securityLoginConfigurationProtection && !JreCompat.isJre8Available()) { try { Class.forName("javax.security.auth.login.Configuration", true, ClassLoader.getSystemClassLoader()); } catch(ClassNotFoundException e) { @@ -359,8 +360,10 @@ public class JreMemoryLeakPreventionList * to the web application class loader. * * Instead we initialize JCA right now. + * + * Fixed in Java 9 onwards (from early access build 133) */ - if (tokenPollerProtection) { + if (tokenPollerProtection && !JreCompat.isJre9Available()) { java.security.Security.getProviders(); } @@ -393,7 +396,10 @@ public class JreMemoryLeakPreventionList } } - if (xmlParsingProtection) { + /* + * Fixed in Java 9 onwards (from early access build 133) + */ + if (xmlParsingProtection && !JreCompat.isJre9Available()) { // There are two known issues with XML parsing that affect // Java 7+. The issues both relate to cached Exception // instances that retain a link to the TCCL via the @@ -419,7 +425,7 @@ public class JreMemoryLeakPreventionList } } - if (ldapPoolProtection) { + if (ldapPoolProtection && !JreCompat.isJre9Available()) { try { Class.forName("com.sun.jndi.ldap.LdapPoolManager"); } catch (ClassNotFoundException e) { Modified: tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml URL: http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml?rev=1758560&r1=1758559&r2=1758560&view=diff ============================================================================== --- tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml (original) +++ tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml Wed Aug 31 09:23:22 2016 @@ -186,6 +186,12 @@ <fix> Make timing attacks against the Realm implementations harder. (schultz) </fix> + <fix> + A number of the JRE memory leaks addressed by the + <code>JreMemoryLeakPreventionListener</code> have been fixed in Java 9 + so the associated protection is now disabled when running on Java 9 + onwards. (markt) + </fix> </changelog> </subsection> <subsection name="Coyote"> Modified: tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml URL: http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml?rev=1758560&r1=1758559&r2=1758560&view=diff ============================================================================== --- tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml (original) +++ tomcat/tc8.5.x/trunk/webapps/docs/config/listeners.xml Wed Aug 31 09:23:22 2016 @@ -184,6 +184,8 @@ application do not result in a memory leak. Note that enabling this protection will trigger a requirement for a graphical environment unless Java is started in head-less mode. The default is <code>false</code>. + This protection is disabled if running on Java 8 onwards since the leak + has been fixed for Java 8 onwards. </p> </attribute> @@ -191,7 +193,9 @@ <p>Enables protection so that calls to <code>java.awt.Toolkit.getDefaultToolkit()</code> triggered by a web application do not result in a memory leak. - Defaults to <code>false</code> because an AWT thread is launched.</p> + Defaults to <code>false</code> because an AWT thread is launched. This + protection is disabled if running on Java 9 onwards since the leak has + been fixed for Java 9 onwards.</p> </attribute> <attribute name="classesToInitialize" required="false"> @@ -219,7 +223,9 @@ trigger a call to this method. A side effect of enabling this protection is the creation of a thread named "GC Daemon". The protection uses reflection to access internal Sun classes and may generate errors on - startup on non-Sun JVMs. The default is <code>true</code>.</p> + startup on non-Sun JVMs. The default is <code>true</code>. This + protection is disabled if running on Java 9 onwards since the leak has + been fixed for Java 9 onwards.</p> </attribute> <attribute name="ldapPoolProtection" required="false"> @@ -232,7 +238,8 @@ class the PoolCleaner thread will be configured with the thread's context class loader set to the web application class loader which in turn will trigger a memory leak on reload. Defaults to - <code>true</code>.</p> + <code>true</code>. This protection is disabled if running on Java 9 + onwards since the leak has been fixed for Java 9 onwards.</p> </attribute> <attribute name="securityLoginConfigurationProtection" required="false"> @@ -242,20 +249,22 @@ class will trigger the initializer that will retain a static reference to the context class loader. The protection loads the class with the system class loader to ensure that the static initializer is not - triggered by a web application. Defaults to <code>true</code>.</p> + triggered by a web application. Defaults to <code>true</code>. This + protection is disabled if running on Java 8 onwards since the leak has + been fixed for Java 8 onwards.</p> </attribute> <attribute name="securityPolicyProtection" required="false"> <p>Enables protection so that usage of the deprecated - <code>javax.security.auth.Policy</code> class by a web application does not - result in a memory leak. The first access of this class will trigger the - static initializer that will retain a static reference to the context - class loader. The protection calls the <code>getPolicy()</code> method - of this class to ensure that the static initializer is not triggered by - a web application. Defaults to <code>true</code>.</p> + <code>javax.security.auth.Policy</code> class by a web application does + not result in a memory leak. The first access of this class will trigger + the static initializer that will retain a static reference to the + context class loader. The protection calls the <code>getPolicy()</code> + method of this class to ensure that the static initializer is not + triggered by a web application. Defaults to <code>true</code>.</p> <p>Note: The underlying leak has been fixed in Java 7 update 51 onwards - and Java 8 onwards. This option is unnecessary if running on a fixed - version of Java.</p> + and Java 8 onwards. This protection is therefor disabled if running on + Java 8 onwards.</p> </attribute> <attribute name="tokenPollerProtection" required="false"> @@ -267,7 +276,9 @@ deployment when the MessageDigest for generating session IDs is initialized. As a result the thread has the Webapp class loader as its thread context class loader. Enabling the protection initializes JCA - early during Tomcat startup. Defaults to <code>true</code>.</p> + early during Tomcat startup. Defaults to <code>true</code>. This + protection is disabled if running on Java 9 onwards since the leak has + been fixed for Java 9 onwards.</p> </attribute> <attribute name="urlCacheProtection" required="false"> @@ -283,7 +294,9 @@ <p>Enables protection so that parsing XML files within a web application does not result in a memory leak. Note that memory profilers may not display the GC root associated with this leak making it particularly - hard to diagnose. Defaults to <code>true</code>.</p> + hard to diagnose. Defaults to <code>true</code>. This protection is + disabled if running on Java 9 onwards since the leak has been fixed for + Java 9 onwards.</p> </attribute> </attributes> --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org