[HBASE-4881] Unhealthy region is on service caused by rollback of region splitting

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.92.0
• Hadoop Flags: Reviewed
• Assignee: Chunhui Shen
• Reporter: Chunhui Shen
• Created: 28/Nov/11 06:28
• Updated: 20/Nov/15 11:55
• Resolved: 12/Dec/11 19:27

Description

If region splitting is failed in the state of JournalEntry.CLOSED_PARENT_REGION
It will be rollback as the following steps:

1.case CLOSED_PARENT_REGION:
  this.parent.initialize();
        break;
2.case CREATE_SPLIT_DIR:
    	this.parent.writestate.writesEnabled = true;
        cleanupSplitDir(fs, this.splitdir);
        break;
3.case SET_SPLITTING_IN_ZK:
        if (server != null && server.getZooKeeper() != null) {
          cleanZK(server, this.parent.getRegionInfo());
        }
        break;

If this.parent.initialize() throws IOException in step 1,
If check filesystem is ok. it will do nothing.
However, the parent region is on service now.