Bikas Saha created TEZ-1631:
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Summary: Session dag submission timeout can result in duplicate
DAG submissions
Key: TEZ-1631
URL: https://issues.apache.org/jira/browse/TEZ-1631
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.4.1
Reporter: Bikas Saha
In TezSession.submitDAG() we could first check if the session is ready and
throw a SessionNotRunning exception if that is not the case. This should be
done before processing the DAG and thus will prevent unnecessary modification
of the DAG.
If the session is ready then we can submit the DAG as usual. Higher level
components already handle SessionNotRunning exception.
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