[HBASE-4539] OpenedRegionHandler racing with itself in ServerShutDownhandler flow leading to HMaster abort

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.92.0
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 05/Oct/11 09:07
• Updated: 20/Nov/15 11:53
• Resolved: 10/Oct/11 03:59

Description

Steps to reproduce
==================
-> Region R1 is being opened in RS1.
->After processing the znode to OPENED RS1 goes down.
->Now before the OpenedRegionHandler executor deletes the znode if ServerShutDownHandler tries to assign the region to RS2, RS2 transits the node to OPENED and this OpenedRegionHandler executor deletes the znode.
->Now if the first OpenedRegionHandler tries deleting the znode it throws NoNode Exception and causes the HMaster to abort.

Issue Links

• depends upon: HBASE-4540 OpenedRegionHandler is not enforcing atomicity of the operation it is performing