Mercurial Hosting > luan
diff src/org/eclipse/jetty/util/preventers/GCThreadLeakPreventer.java @ 802:3428c60d7cfc
replace jetty jars with source
author | Franklin Schmidt <fschmidt@gmail.com> |
---|---|
date | Wed, 07 Sep 2016 21:15:48 -0600 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/eclipse/jetty/util/preventers/GCThreadLeakPreventer.java Wed Sep 07 21:15:48 2016 -0600 @@ -0,0 +1,64 @@ +// +// ======================================================================== +// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. +// ------------------------------------------------------------------------ +// All rights reserved. This program and the accompanying materials +// are made available under the terms of the Eclipse Public License v1.0 +// and Apache License v2.0 which accompanies this distribution. +// +// The Eclipse Public License is available at +// http://www.eclipse.org/legal/epl-v10.html +// +// The Apache License v2.0 is available at +// http://www.opensource.org/licenses/apache2.0.php +// +// You may elect to redistribute this code under either of these licenses. +// ======================================================================== +// + +package org.eclipse.jetty.util.preventers; + +import java.lang.reflect.Method; + +/** + * GCThreadLeakPreventer + * + * Prevents a call to sun.misc.GC.requestLatency pinning a webapp classloader + * by calling it with a non-webapp classloader. The problem appears to be that + * when this method is called, a daemon thread is created which takes the + * context classloader. A known caller of this method is the RMI impl. See + * http://stackoverflow.com/questions/6626680/does-java-garbage-collection-log-entry-full-gc-system-mean-some-class-called + * + * This preventer will start the thread with the longest possible interval, although + * subsequent calls can vary that. Recommend to only use this class if you're doing + * RMI. + * + * Inspired by Tomcat JreMemoryLeakPrevention. + * + */ +public class GCThreadLeakPreventer extends AbstractLeakPreventer +{ + /* ------------------------------------------------------------ */ + /** + * @see org.eclipse.jetty.util.preventers.AbstractLeakPreventer#prevent(java.lang.ClassLoader) + */ + @Override + public void prevent(ClassLoader loader) + { + try + { + Class clazz = Class.forName("sun.misc.GC"); + Method requestLatency = clazz.getMethod("requestLatency", new Class[] {long.class}); + requestLatency.invoke(null, Long.valueOf(Long.MAX_VALUE-1)); + } + catch (ClassNotFoundException e) + { + LOG.ignore(e); + } + catch (Exception e) + { + LOG.warn(e); + } + } + +}