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From "Kevan Miller (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (GERONIMO-3687) classloader deadlock during server startup
Date Sun, 16 Dec 2007 14:52:43 GMT

     [ https://issues.apache.org/jira/browse/GERONIMO-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevan Miller reopened GERONIMO-3687:
------------------------------------


Ugh... I'm hitting this deadlock again...

/me bangs head on hard object

I'm also now seeing exact same behavior as someone described on user/dev list. Runs fine when
installed on my /Users/kevan directory, but deadlocks when installed on /






> classloader deadlock during server startup
> ------------------------------------------
>
>                 Key: GERONIMO-3687
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-3687
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>    Affects Versions: 2.0.2, 2.1
>            Reporter: Kevan Miller
>            Assignee: Kevan Miller
>             Fix For: 2.0.x, 2.1
>
>
> I've been seeing regular deadlocks running Geronimo on Leopard.
> It's the same basic scenario as found in GERONIMO-3141. For some reason, the work around
in 3141 doesn't work for me on Leopard.
> Just another hack and I'm sure we can fix this...
> Here's background info...
> $ ./geronimo.sh run
> Using GERONIMO_BASE:   /Users/kevan/geronimo-jetty6-jee5-2.0.2
> Using GERONIMO_HOME:   /Users/kevan/geronimo-jetty6-jee5-2.0.2
> Using GERONIMO_TMPDIR: var/temp
> Using JRE_HOME:        /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home
> You can then send the java process a QUIT signal (kill -3 <pid>) to have java dump
out the thread stack traces. The deadlock occurs during a load of an Iterator class (IIRC).
The JVM is not well behaved, IMO. Here's the thread stack traces that I get:
> Full thread dump Java HotSpot(TM) Client VM (1.5.0_13-119 mixed mode):
> "Low Memory Detector" daemon prio=5 tid=0x01009d60 nid=0x858800 runnable [0x00000000..0x00000000]
> "CompilerThread0" daemon prio=9 tid=0x01009330 nid=0x857a00 waiting on condition [0x00000000..0x00000000]
> "Signal Dispatcher" daemon prio=9 tid=0x01008e60 nid=0x855e00 waiting on condition [0x00000000..0x00000000]
> "Finalizer" daemon prio=8 tid=0x01007d10 nid=0x81ba00 waiting for monitor entry [0xb0a05000..0xb0a05d90]
> 	at org.apache.geronimo.transformer.TransformerCollection.transform(TransformerCollection.java:35)
> 	at sun.instrument.TransformerManager.transform(TransformerManager.java:122)
> 	at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:155)
> 	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:82)
> 	at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
> 	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
> "Reference Handler" daemon prio=10 tid=0x01007910 nid=0x81a200 in Object.wait() [0xb0984000..0xb0984d90]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0x05a735f8> (a java.lang.ref.Reference$Lock)
> 	at java.lang.Object.wait(Object.java:474)
> 	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
> 	- locked <0x05a735f8> (a java.lang.ref.Reference$Lock)
> "main" prio=5 tid=0x010018b0 nid=0xb0801000 waiting for monitor entry [0xb07ff000..0xb0800188]
> 	at java.lang.ClassLoader.findBootstrapClass(Native Method)
> 	at java.lang.ClassLoader.findBootstrapClass0(ClassLoader.java:946)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:308)
> 	- locked <0x05a75b78> (a sun.misc.Launcher$ExtClassLoader)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> 	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> "VM Thread" prio=9 tid=0x01007060 nid=0x809800 runnable
> "VM Periodic Task Thread" prio=9 tid=0x0100aa00 nid=0x859c00 waiting on condition
> "Exception Catcher Thread" prio=10 tid=0x01001b00 nid=0x80ae00 runnable
> Found one Java-level deadlock:
> =============================
> "Finalizer":
>  waiting to lock monitor 0x0081b070 (object 0x05a73660, a sun.misc.Launcher$AppClassLoader),
>  which is held by "main"
> "main":
>  waiting to lock monitor 0x0081b094 (object 0x09584b40, a [[I),
>  which is held by "Finalizer"
> Java stack information for the threads listed above:
> ===================================================
> "Finalizer":
> 	at org.apache.geronimo.transformer.TransformerCollection.transform(TransformerCollection.java:35)
> 	at sun.instrument.TransformerManager.transform(TransformerManager.java:122)
> 	at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:155)
> 	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:82)
> 	at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
> 	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)
> "main":
> 	at java.lang.ClassLoader.findBootstrapClass(Native Method)
> 	at java.lang.ClassLoader.findBootstrapClass0(ClassLoader.java:946)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:308)
> 	- locked <0x05a75b78> (a sun.misc.Launcher$ExtClassLoader)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> 	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
> 	- locked <0x05a73660> (a sun.misc.Launcher$AppClassLoader)
> Found 1 deadlock.

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