Javax.Resource Exception

I'm running a periodic task using the Resin application server.  

The task is supposed to query student data in one table and produce historical data in another table.

THe task is programmed to run every minute.

The first time the task runs I get a javax.resource.spi.workException:  Reentrant Work tasks are not allowed.
The subsequent times the task runs I get a javax.resource.ResourceException  Connection Pool is full.

My questions:
What is likely happening here?
What does the Reentrant task exception mean?   How can it be prevented?
tmonteitAsked:
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Mayank SAssociate Director - Product EngineeringCommented:
Sounds to me like you are not closing the connections properly so they are not getting released to the pool. Make sure you are closing the connections in a finally block everywhere.
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tmonteitAuthor Commented:
What's a javax.resource.spi.WorkException?   What causes it?
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Mayank SAssociate Director - Product EngineeringCommented:
Can't find the class in the API. Are you using any 3rd party JARs?
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tmonteitAuthor Commented:
It was a 3rd party jar...  
mayanyeagle provided the clue.
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