[hbase] Stuck regionserver?
---------------------------
Key: HADOOP-2343
URL: https://issues.apache.org/jira/browse/HADOOP-2343
Project: Hadoop
Issue Type: Bug
Components: contrib/hbase
Reporter: stack
Priority: Minor
Looking in logs, a regionserver went down because it could not contact the
master after 60 seconds. Watching logging, the HRS is repeatedly checking all
150 loaded regions over and over again w/ a pause of about 5 seconds between
runs... then there is a suspicious 60+ second gap with no logging as though the
regionserver had hung up on something:
{code}
2007-12-03 13:14:54,178 DEBUG hbase.HRegionServer - flushing region
postlog,img151/60/plakatlepperduzy1hh7.jpg,1196614355635
2007-12-03 13:14:54,178 DEBUG hbase.HRegion - Not flushing cache for region
postlog,img151/60/plakatlepperduzy1hh7.jpg,1196614355635: snapshotMemcaches()
determined that there was nothing to do
2007-12-03 13:14:54,205 DEBUG hbase.HRegionServer - flushing region
postlog,img247/230/seanpaul4li.jpg,1196615889965
2007-12-03 13:14:54,205 DEBUG hbase.HRegion - Not flushing cache for region
postlog,img247/230/seanpaul4li.jpg,1196615889965: snapshotMemcaches()
determined that there was nothing to do
2007-12-03 13:16:04,305 FATAL hbase.HRegionServer - unable to report to master
for 67467 milliseconds - aborting server
2007-12-03 13:16:04,455 INFO hbase.Leases - regionserver/0:0:0:0:0:0:0:0:60020
closing leases
2007-12-03 13:16:04,455 INFO hbase.Leases$LeaseMonitor -
regionserver/0:0:0:0:0:0:0:0:60020.leaseChecker exiting
{code}
Master seems to be running fine scanning its ~700 regions. Then you see this
in log, before the HRS shuts itself down.
{code}
2007-12-03 13:14:31,416 INFO hbase.Leases - HMaster.leaseChecker lease expired
153260899/1532608992007-12-03 13:14:31,417 INFO hbase.HMaster -
XX.XX.XX.102:60020 lease expired
{code}
... and we go on to process shutdown.
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