[Exist-open] Locking problem with background process

[Gary L. <gar...@en...>]

My Cocoon app has a QuartzScheduler job which adds/deletes eXist resources.
Users can also add/delete resources when navigating the app.  (using
eXist-1.0)
 
I haven't run into this previously, but now I'm getting an occasional lock
which stops the job and the browser. After about 5 minutes the job will
begin processing again.  It could be that I am not managing the adds/deletes
properly but I'm not sure.  Here's the exception:
 
WARN  [http-8080-Processor23] exist.collections.Collection 2006-11-16
19:43:02,640 - time out while acquiring a lock
org.exist.util.LockException: time out while acquiring a lock
 at
org.exist.storage.lock.ReentrantReadWriteLock.acquire(ReentrantReadWriteLock
.java:94)
 at org.exist.collections.Collection.getDocuments(Collection.java:358)
 at org.exist.collections.Collection.allDocs(Collection.java:338)
 at org.exist.collections.Collection.allDocs(Collection.java:319)
 at org.exist.xquery.functions.ExtCollection.eval(ExtCollection.java:129)
 at org.exist.xquery.InternalFunctionCall.eval(InternalFunctionCall.java:49)
 at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:56)
 at org.exist.xquery.PathExpr.eval(PathExpr.java:216)
 at org.exist.xquery.ForExpr.eval(ForExpr.java:139)
 at org.exist.xquery.BindingExpression.eval(BindingExpression.java:109)
 at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:56)
 at org.exist.xquery.PathExpr.eval(PathExpr.java:216)
 at org.exist.xquery.EnclosedExpr.eval(EnclosedExpr.java:66)
 at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:56)
 at org.exist.xquery.PathExpr.eval(PathExpr.java:216)
 at org.exist.xquery.ElementConstructor.eval(ElementConstructor.java:233)
 at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:56)
 at org.exist.xquery.PathExpr.eval(PathExpr.java:216)
 at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:56)
 at org.exist.xquery.XQuery.execute(XQuery.java:201)
 at org.exist.xquery.XQuery.execute(XQuery.java:171)
 at
org.exist.xmldb.LocalXPathQueryService.execute(LocalXPathQueryService.java:1
85)
 at org.exist.cocoon.XQueryGenerator.generate(XQueryGenerator.java:328)
 at
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLP
ipeline(AbstractProcessingPipeline.java:575)
..................
WARN  [http-8080-Processor23] storage.lock.ReentrantReadWriteLock 2006-11-16
19:43:04,421 - Possible lock problem: thread
Thread[http-8080-Processor23,5,main] released a lock it didn't hold. Either
the thread was interrupted or it never acquired the lock. The lock was owned
by: Thread[Thread-40,5,QuartzScheduler:Cocoon]

Could there be something wrong in the way I'm working with the collection
objects that could be causing this?  Do I need to make sure only one
collection.storeResource is occuring from the app?
 
Thanks,
Gary