DispatchQueue, StartLelve and PacakageAdmin threads holding VM up.
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Key: FELIX-2434
URL: https://issues.apache.org/jira/browse/FELIX-2434
Project: Felix
Issue Type: Bug
Components: Framework
Affects Versions: framework-2.0.5
Environment: Linux (RHEL 4 32Bit), java 1.6 server vm (14-b08)
Linux (RHEL 5 32bit & 64Bit) java 1.6 server vm (13)
Reporter: Martin Ritchie
Hi, In Qpid we started using Felix more for managing our broker plugins.
However we are having random lockups occur during our test broker shutdown.
Our PluginManager
(https://svn.apache.org/repos/asf/qpid/trunk/qpid/java/broker/src/main/java/org/apache/qpid/server/plugins/PluginManager.java)
is shutdown via a VM ShutdownHook where it closes Service Trackers and then
calls stop() on Felix followed by a waitForStop().
We are frequently seeing the following three Felix threads in a WAITING state
that could be holding the VM up. Looking at the 2.0.5 code the EventDispatcher
does not use a Daemon thread could this be what is holding our VM open?
Name: FelixDispatchQueue
State: WAITING on java.util.arrayl...@dc904a
Total blocked: 21 Total waited: 22
Stack trace:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:485)
org.apache.felix.framework.util.EventDispatcher.run(EventDispatcher.java:917)
org.apache.felix.framework.util.EventDispatcher.access$000(EventDispatcher.java:54)
org.apache.felix.framework.util.EventDispatcher$1.run(EventDispatcher.java:106)
java.lang.Thread.run(Thread.java:619)
Name: FelixStartLevel
State: WAITING on java.util.arrayl...@1c68b20
Total blocked: 7 Total waited: 8
Stack trace:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:485)
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:242)
java.lang.Thread.run(Thread.java:619)
Name: FelixPackageAdmin
State: WAITING on org.apache.felix.framework.packageadmini...@1d4ab05
Total blocked: 0 Total waited: 1
Stack trace:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:485)
org.apache.felix.framework.PackageAdminImpl.run(PackageAdminImpl.java:316)
java.lang.Thread.run(Thread.java:619)
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