FULL PRODUCT VERSION :
java version " 1.7.0_25 "
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux jmmc-laurent 2.6.35.14-106.fc14.x86_64 #1 SMP Wed Nov 23 13:07:52 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
Aspro2 application hosted at jmmc.fr: http://apps.jmmc.fr/~swmgr/Aspro2/Aspro2.jnlp

A DESCRIPTION OF THE PROBLEM :
When I quit my Aspro2 (Swing) application running in Java Web Start environement, shutdown hooks are not run properly:
- java.util.logging log statements are 'lost' as reported in openjdk's core libs mailing list:
- the open source JSamp library does not properly stop: .samp lock file is still present in the user's home directory (http://software.astrogrid.org/doc/p/jsamp/)

When I start again the application, the JSamp library reads the lock file and tries to connect to the dead hub which causes a slow startup.

1/ I reported few comments without any feeback:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-June/018460.html

I think the main issue is that application's hook are executed at the same time with jvm's hooks like LogManager or StreamCloser although the JVM Shutdown class supports hook priorities !

2/ I successfully performed a debugger session of my application (with JSamp source code) using netbeans attached to javaws JVM (socket) using the following script:
[bourgesl@jmmc-laurent$ cat javaws-debug.sh
#!/bin/sh
export JAVAWS_TRACE_NATIVE=1
export JAVAWS_VM_ARGS= " -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8989,server=y,suspend=n "
javaws " $@ "

I added System.out and printStackTrace statements (j.u.l Logger is unusable) to JSamp ShutdownManager class:
    /**
     * Invoked on shutdown by runtime.
     */
    private void doCleanup() {
        Hook[] hooks;
        synchronized ( this ) {
            hooks = (Hook[]) hookMap_.values().toArray( new Hook[ 0 ] );
        }
        Arrays.sort( hooks );
        
        // NOTE: JUL Logs are disabled by the LogManager shutdown hook !
        // TODO Mark: always use both log and System.out to log messages in shutdown / stop methods everywhere
        // (Hub, HubServiceMode, HubProfile, HttpServer ...)
        
        logger_.info( " SAMP shutdown start " );
        System.out.println( " SAMP shutdown start " );
                
        for ( int ih = 0; ih < hooks.length; ih++ ) {
            try {
                hooks[ ih ].runnable_.run();
            }
            catch ( RuntimeException e ) {
                logger_.log( Level.WARNING, " Shutdown hook failure: " + e, e );
                System.err.println( " Shutdown hook failure: " + e );
                e.printStackTrace(System.err);
            }
        }
        logger_.info( " SAMP shutdown end " );
        System.out.println( " SAMP shutdown end " );
    }

And I got the following exception:
    Shutdown hook failure:java.lang.IllegalStateException: zip file closed
    java.lang.IllegalStateException: zip file closed
    at java.util.zip.ZipFile.ensureOpen(ZipFile.java:634)
    at java.util.zip.ZipFile.getEntry(ZipFile.java:305)
    at java.util.jar.JarFile.getEntry(JarFile.java:226)
    at com.sun.deploy.cache.CachedJarFile.getEntry(Unknown Source)
    at java.util.jar.JarFile.getJarEntry(JarFile.java:209)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.getResource(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:411)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.astrogrid.samp.hub.HubServiceMode$2$1.shutdown(HubServiceMode.java:256)
    at org.astrogrid.samp.hub.Hub.shutdown(Hub.java:105)
    at org.astrogrid.samp.hub.Hub$4.run(Hub.java:521)
    at org.astrogrid.samp.ShutdownManager.doCleanup(ShutdownManager.java:94)
    at org.astrogrid.samp.ShutdownManager.access$000(ShutdownManager.java:16)
    at org.astrogrid.samp.ShutdownManager$1.run(ShutdownManager.java:41)

The exception cause is in the HubServiceMode... shutdown() method:
    public void shutdown() {
        super.shutdown();
        SwingUtilities.invokeLater( new Runnable() {
            public void run() {
                if ( tidier != null ) {
                    tidier.tidyGui();
                }
            }
        } );
    }

The problem occurs when the JVM loads the Runnable class beacuse the JarFile was closed !!!
maybe it is related to JNLPClassLoader.findClass() ?

I fixed the JSamp library applying a very simple work around:
- instanciate the Runnable class in constructor()
    /* LBO: preload runnable callback */
    private Runnable tidierCallback = null;

    public void start() {
...
        SwingUtilities.invokeLater( new Runnable() {
            public void run() {
...
                final Tidier tidier = configureHubWindow( window,
                                                           profiles,
                                                           runners,
                                                           service );
                if (tidier != null) {
                    // LBO: load callback ASAP
                    tidierCallback = new Runnable() {
                        public void run() {
                            tidier.tidyGui();
                        }
                    };
                }
...
            }
        } );
    }
- invoke that Runnable instance in the stop() method:
    public void shutdown() {
        super.shutdown();
        /* LBO: fix tidier call */
        if (tidierCallback != null) {
            SwingUtilities.invokeLater(tidierCallback);
        }
    }

Whereas I found a workaround, I do not want to patch the JSamp library (again) because it will impact many other applications (delays ...)

Finally I suspect a bug in JNLP class loader or a conflict between shutdown hooks: why is the Jar file closed ?


REGRESSION. Last worked in version 7u10

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1/ Start Aspro2 with javaws (+ Java Console enabled):
javaws http://apps.jmmc.fr/~swmgr/Aspro2/Aspro2.jnlp
2/ Close the window and Click on 'Don't Save' to the confirmation dialog
3/ Does the .samp lock file still exist ?
[bourgesl@jmmc-laurent jmmc]$ ll ~/.samp
-rw-------. 1 bourgesl laogsite 396 7 ao??t 13:48 /home/bourgesl/.samp

It means that the JSamp shutdown hook failed.
4/ Restart the application:
javaws http://apps.jmmc.fr/~swmgr/Aspro2/Aspro2.jnlp
5/ Look at the Java console:
Several exceptions are present indicating that JSamp loaded the .samp lock file and failed to connect the hub:
11:50:09.681 WARN [AWT-EventQueue-2] org.astrogrid.samp.client.HubConnector - Hub connection attempt failed
org.astrogrid.samp.client.SampException: Connexion refus??e
at org.astrogrid.samp.xmlrpc.XmlRpcHubConnection.rawExec(XmlRpcHubConnection.java:187) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.xmlrpc.XmlRpcHubConnection.<init>(XmlRpcHubConnection.java:53) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.xmlrpc.StandardHubConnection.<init>(StandardHubConnection.java:31) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.xmlrpc.StandardClientProfile.register(StandardClientProfile.java:121) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.client.HubConnector.createConnection(HubConnector.java:745) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.client.HubConnector.getConnection(HubConnector.java:663) ~[jsamp-1.3-3.jar:1.3-3]
at org.astrogrid.samp.client.HubConnector.setActive(HubConnector.java:476) ~[jsamp-1.3-3.jar:1.3-3]
at fr.jmmc.jmcs.network.interop.SampManager.<init>(SampManager.java:148) ~[jmcs.jar:na]
at fr.jmmc.jmcs.network.interop.SampManager.getInstance(SampManager.java:69) ~[jmcs.jar:na]



ERROR MESSAGES/STACK TRACES THAT OCCUR :
    java.lang.IllegalStateException: zip file closed
    at java.util.zip.ZipFile.ensureOpen(ZipFile.java:634)
    at java.util.zip.ZipFile.getEntry(ZipFile.java:305)
    at java.util.jar.JarFile.getEntry(JarFile.java:226)
    at com.sun.deploy.cache.CachedJarFile.getEntry(Unknown Source)
    at java.util.jar.JarFile.getJarEntry(JarFile.java:209)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.getResource(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:411)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.astrogrid.samp.hub.HubServiceMode$2$1.shutdown(HubServiceMode.java:256)
    at org.astrogrid.samp.hub.Hub.shutdown(Hub.java:105)
    at org.astrogrid.samp.hub.Hub$4.run(Hub.java:521)
    at org.astrogrid.samp.ShutdownManager.doCleanup(ShutdownManager.java:94)
    at org.astrogrid.samp.ShutdownManager.access$000(ShutdownManager.java:16)
    at org.astrogrid.samp.ShutdownManager$1.run(ShutdownManager.java:41)


REPRODUCIBILITY :
This bug can be reproduced always.