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
