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 //
 //  ========================================================================
 //  Copyright (c) 1995-2012 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;
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.
    /* ------------------------------------------------------------ */
    
    @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(.-1));
        }
        catch (ClassNotFoundException e)
        {
            .ignore(e);
        }
        catch (Exception e)
        {
            .warn(e);
        }
    }
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