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From "Ding,Dongchao" <dingdongc...@baidu.com>
Subject Re: Region server crashes after GC pause time
Date Thu, 14 Apr 2016 06:51:03 GMT
Dump the jvm heap,analysis the the heap and find which query(s) cost so
many memory?
In my ever bad case,the RS crashed for Long GC pauses because of a big
query on Batch Get operation.


In addition,I think you can increase the men of JVM, 512m is so small for
RS.

 

在 16/4/14 14:00, "karthi keyan" <karthi93.sankar@gmail.com> 写入:

>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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