[HBASE-18103] [AMv2] If Master gives OPEN to another, if original eventually succeeds, Master will kill it

• Type: Sub-task
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: master, proc-v2
• Hadoop Flags: Reviewed
• Assignee: Umesh Agashe
• Reporter: Michael Stack
• Created: 24/May/17 23:08
• Updated: 17/Jun/22 18:10
• Resolved: 22/Aug/17 00:24

Description

If a RS is slow to open a Region, the Master will give the Region to another to open it (In this case, was a massive set of edits to process and a load of StoreFiles to open...). Should the original RS succeed with its open eventually, on reporting the master the successful open, the Master currently kills the RS because the region is supposed to be elsewhere.

This is an easy fix.

The RS does not fully open a Region until Master gives it the go so just close the region if master rejects the open....

See '6.1.1 If Master gives Region to another to Open, old RS will be kill itself on reject by Master; easy fix!' in https://docs.google.com/document/d/1eVKa7FHdeoJ1-9o8yZcOTAQbv0u0bblBlCCzVSIn69g/edit#heading=h.qtfojp9774h