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From karthi keyan <karthi93.san...@gmail.com>
Subject Region server crashes after GC pause time
Date Thu, 14 Apr 2016 06:00:59 GMT
Hi ,

i got this issue in HBase while at peak time handling more requests . can
any one pls guide me to resolve the Long GC pauses in hbase .

JDK-7 , JVM heap 512m

HBase 0.98.13


 INFO  [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or
host machine (eg GC): pause of approximately 1466ms
GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=1967ms
 INFO  [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or
host machine (eg GC): pause of approximately 2304ms
GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=2775ms
 INFO  [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or
host machine (eg GC): pause of approximately 2287ms
GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=2775ms

 INFO  [RS:0;0:0:0:0:0:0:0:0:44037-SendThread(<host>:2181)]
zookeeper.ClientCnxn: Client session timed out, have not heard from server
in 6819ms for sessionid 0x1540ab48b280004, closing socket connection and
attempting reconnect
 INFO  [SplitLogWorker-<host>,44037,1460468489645-SendThread(<host>:2181)]
zookeeper.ClientCnxn: Client session timed out, have not heard from server
in 6819ms for sessionid 0x1540ab48b280005, closing socket connection and
attempting reconnect

Once after this HBase Region Server moved to Dead state.

Best,
Karthik

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