[TEZ-1631] Session dag submission timeout can result in duplicate DAG submissions

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4.1
• Fix Version/s: 0.5.0
• Hadoop Flags: Reviewed
• Assignee: Jeff Zhang
• Reporter: Bikas Saha
• Created: 29/Sep/14 17:39
• Updated: 16/Oct/14 04:28
• Resolved: 01/Oct/14 00:57

Description

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.