Actually in 3.0 DataContext IS thread-safe (DataObjects are not).
CayenneContext probably not. At least no effort has been made to make
it thread-safe.
Now regarding the stack below... Is it possible to take a thread dump
to see what locks are involved? I.e. "kill -QUIT pid"
Andrus
On Nov 9, 2007, at 5:00 AM, Aristedes Maniatis wrote:
I was able to create a deadlock between two threads committing to
the same context today. Cayenne as of svn trunk yesterday. Are
contexts not thread-safe for writing or is this a bug?
[java] -- Thread Foxtrot Single Worker Thread #3 (Id = 39) BLOCKED
[EMAIL PROTECTED]
[java] -- org.apache.cayenne.event.DispatchQueue.dispatchEvent
(DispatchQueue.java:54)
[java] -- org.apache.cayenne.event.EventManager.dispatchEvent
(EventManager.java:348)
[java] -- org.apache.cayenne.event.EventManager.postEvent
(EventManager.java:319)
[java] -- org.apache.cayenne.remote.ClientChannel.onSync
(ClientChannel.java:215)
[java] -- org.apache.cayenne.CayenneContext.doCommitChanges
(CayenneContext.java:249)
[java] -- org.apache.cayenne.CayenneContext.commitChanges
(CayenneContext.java:208)
[java] -- Thread AWT-EventQueue-0 (Id = 22) BLOCKED
[EMAIL PROTECTED]
[java] --
org.apache.cayenne.CayenneContextMergeHandler.runWithEventsDisabled
(CayenneContextMergeHandler.java:266)
[java] -- org.apache.cayenne.CayenneContextMergeHandler.graphFlushed
(CayenneContextMergeHandler.java:81)
[java] -- sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
[java] -- sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
[java] -- java.lang.reflect.Method.invoke(Method.java:585)
[java] -- org.apache.cayenne.util.Invocation.fire(Invocation.java:204)
[java] -- org.apache.cayenne.event.EventManager$Dispatch.fire
(EventManager.java:409)
[java] -- org.apache.cayenne.event.DispatchQueue.dispatchEvent
(DispatchQueue.java:162)
[java] -- org.apache.cayenne.event.DispatchQueue.dispatchEvent
(DispatchQueue.java:58)
[java] -- org.apache.cayenne.event.EventManager.dispatchEvent
(EventManager.java:348)
[java] -- org.apache.cayenne.event.EventManager.postEvent
(EventManager.java:319)
[java] -- org.apache.cayenne.remote.ClientChannel.onSync
(ClientChannel.java:215)
[java] -- org.apache.cayenne.CayenneContext.doCommitChanges
(CayenneContext.java:249)
[java] -- org.apache.cayenne.CayenneContext.commitChanges
(CayenneContext.java:208)
Ari Maniatis
-------------------------->
ish
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