> > Is there a need to synchronize on the object(s)?
hmm, no synchronize shouldn't be necessary because PB instance isn't threadsafe all in all. Maybe the object was reclaimed by GC after the ref.get() call.
Are you sure that each thread operates on its own PB instance while running your test?
regards, Armin
Gary wrote:
While running a multi-threaded stress test, I received the following exception:
java.lang.NullPointerException at java.lang.Throwable.<init>(Throwable.java) at java.lang.Throwable.<init>(Throwable.java) at java.lang.NullPointerException.<init>(NullPointerException.java:60) at org.apache.ojb.broker.accesslayer.RsIterator$ResourceWrapper.beforeClose(RsIterator.java) at org.apache.ojb.broker.core.PersistenceBrokerAbstractImpl.notifiyStateListener(PersistenceBrokerAbstractImpl.java)
It looks like "ref" or "ref.get()" became null after the check in the following method:
public void beforeClose(PBStateEvent event)
{
if(ref != null && ref.get() != null)
{
((RsIterator)ref.get()).releaseDbResources();
ref = null;
}
}
Is there a need to synchronize on the object(s)?
Gary
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