| // |
| // ======================================================================== |
| // 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); |
| } |
| } |
| |
| } |