Daniel Seidewitz created CAMEL-7598:
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Summary: Camel does not clear the jpa session after each processed
message batch
Key: CAMEL-7598
URL: https://issues.apache.org/jira/browse/CAMEL-7598
Project: Camel
Issue Type: Bug
Components: camel-jpa
Affects Versions: 2.12.3
Reporter: Daniel Seidewitz
We are using apache camel to poll from a database. As we want processed rows
only to be updated we have disabled consumeDelete on the JPA endpoint.
During testing we found a large memory leak: all polled entities are kept in
the session cache (we are using hibernate as persistence provider).
The issue seems to be in the JpaConsumer. In method poll() it calls
enitityManager.joinTransaction() at the beginning and entitiyManager.flush() at
the end of the method but it never calls entityManager.clear(). As camel is
reusing the underlying session during each poll() this causes the first level
entity cache to grow indefinitely.
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