Listner exception

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bweiss

I need some help comprehending a frequent error in our log file. We are running Community 3.3.0 on Ubuntu 9.04.

The error below has shown up more and more frequently in our log files and begins before the server has even completed starting. We are running a script which attempts to thumbnail files added to a particular directory. AFAIK the thumbnails seem to be getting created properly but I am not sure where else to look to find out what is going wrong or what I may not have configured properly.

16:26:36,527 ERROR [org.alfresco.repo.transaction.AlfrescoTransactionSupport] After completion (committed) listener exception: 
   listener: org.alfresco.repo.action.ActionTransactionListener@fc42cfa2
java.lang.NullPointerException
   at org.alfresco.repo.action.CreateThumbnailActionFilter.compare(CreateThumbnailActionFilter.java:47)
   at org.alfresco.repo.action.CreateThumbnailActionFilter.compare(CreateThumbnailActionFilter.java:30)
   at org.alfresco.repo.action.AsynchronousActionExecutionQueueImpl.executeAction(AsynchronousActionExecutionQueueImpl.java:277)
   at org.alfresco.repo.action.AsynchronousActionExecutionQueueImpl.executeAction(AsynchronousActionExecutionQueueImpl.java:219)
   at org.alfresco.repo.action.ActionServiceImpl.queueAction(ActionServiceImpl.java:555)
   at org.alfresco.repo.action.ActionServiceImpl.postCommit(ActionServiceImpl.java:542)
   at org.alfresco.repo.action.ActionTransactionListener.afterCommit(ActionTransactionListener.java:77)
   at org.alfresco.repo.transaction.AlfrescoTransactionSupport$TransactionSynchronizationImpl.afterCompletion(AlfrescoTransactionSupport.java:808)
   at org.springframework.transaction.support.TransactionSynchronizationUtils.invokeAfterCompletion(TransactionSynchronizationUtils.java:168)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.invokeAfterCompletion(AbstractPlatformTransactionManager.java:996)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerAfterCompletion(AbstractPlatformTransactionManager.java:971)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:799)
   at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
   at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:394)
   at org.alfresco.util.transaction.SpringAwareUserTransaction.commit(SpringAwareUserTransaction.java:472)
   at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:343)
   at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:228)
   at org.alfresco.repo.action.AsynchronousActionExecutionQueueImpl$ActionExecutionWrapper$1.doWork(AsynchronousActionExecutionQueueImpl.java:499)
   at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:508)
   at org.alfresco.repo.action.AsynchronousActionExecutionQueueImpl$ActionExecutionWrapper.run(AsynchronousActionExecutionQueueImpl.java:502)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:619)
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bweiss

For anyone else having this same issue, I discovered that if the rule triggering the thumbnail script is not set to run in the background, the error goes away.  Not sure why but it has solved the problem.