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https://issues.apache.org/jira/browse/FELIX-4837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16133169#comment-16133169
]
Mark Zeldis commented on FELIX-4837:
------------------------------------
I don't work or use this project, but I did track down and workaround this
webstart bug for myself. I figured I would share since this is one of the rare
places that mention it. It's a nasty hack so you should only really use it if
you have no other choice. Unfortunately I need it.
private static void evilEvilWebstartHack(){
//this is the hack of a lifetime here.
//there is a bug that arrived sometime around the mid java7 releases.
shutdown hooks get created that shut down loggers and close down the
classloader jars
//that means that anything we try to do in our shutdown hook throws an
exception, but only after some random amount of time
try {
Class clazz = Class.forName("java.lang.ApplicationShutdownHooks");
Field field = clazz.getDeclaredField("hooks");
field.setAccessible(true);
Map hooks = (Map)field.get(clazz);
for (Iterator it=hooks.values().iterator(); it.hasNext();){
Thread thread=(Thread)it.next();
if
("javawsSecurityThreadGroup".equals(thread.getThreadGroup().getName())){
it.remove();
}
}
}
catch (Exception e) {
}
}
> Workaround for JNLPClassLoader in ShutdownHook
> -----------------------------------------------
>
> Key: FELIX-4837
> URL: https://issues.apache.org/jira/browse/FELIX-4837
> Project: Felix
> Issue Type: Bug
> Components: Framework
> Affects Versions: framework-5.0.1, framework-5.6.1, framework-5.6.4
> Environment: all
> Reporter: Nicolas Roduit
> Assignee: Karl Pauls
>
> This a workaround of the issue that I submitted on
> https://bugs.openjdk.java.net/browse/JDK-8054639
> The Java Web Start classloader doesn't support to have anonymous classes or
> enum within the shutdown hook.
> The patch below allows to stop all the bundles correctly when calling
> m_felix.stop() in the shutdown hook. Otherwise the framework throws an
> exception and do not call the bundle stop. This is a problem when each bundle
> write its preferences or state during the stop method.
> {code}
> diff --git a/framework/src/main/java/org/apache/felix/framework/Felix.java
> b/framework/src/main/java/org/apache/felix/framework/Felix.java
> index c6b305a..e44ccea 100644
> --- a/framework/src/main/java/org/apache/felix/framework/Felix.java
> +++ b/framework/src/main/java/org/apache/felix/framework/Felix.java
> @@ -1023,7 +1023,7 @@
> {
> // Spec says stop() on SystemBundle should return immediately and
> // shutdown framework on another thread.
> - new Thread(new Runnable() {
> + Thread t = new Thread( "FelixShutdown"){
> public void run()
> {
> try
> @@ -1038,7 +1038,8 @@
> ex);
> }
> }
> - }, "FelixShutdown").start();
> + };
> + t.start();
> }
> }
> {code}
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