[HBASE-8705] RS holding META when restarted in a single node setup may hang infinitely without META assignment

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.95.1
• Fix Version/s: 0.98.0, 0.95.2
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 07/Jun/13 07:16
• Updated: 23/Sep/13 19:28
• Resolved: 22/Jun/13 11:45

Description

This bug may be minor as it likely to happen in a single node setup.
I restarted the RS holding META. The master tried assigning META using MetaSSH. But tried this before the new RS came up.
So as not region plan is found

 if (plan == null) {
        LOG.warn("Unable to determine a plan to assign " + region);
        if (tomActivated){
          this.timeoutMonitor.setAllRegionServersOffline(true);
        } else {
          regionStates.updateRegionState(region, RegionState.State.FAILED_OPEN);
        }
        return;
      }

we just return without assigment. And this being the META the small cluster just hangs.

Issue Links

• is related to: HBASE-8750 MetaServerShutdownHandler stucks if .META. assignment fails in previous attempt