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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