Yes, It happened in my cluster.
[RegionServer LOG]
2017-03-20 11:02:21,466 WARN org.apache.hadoop.hbase.regionserver.wal.FSHLog:
Couldn't find oldest seqNum for the region we are about to flush: []
2017-03-20 11:02:21,466 INFO org.apache.hadoop.hbase.regionserver.HRegion:
Finished memstore flush of ~0/0, currentsize=/ for region . in 0ms,
sequenceid=, compaction requested=false
2017-03-20 11:02:21,466 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server :
Unrecoverable exception while closing region , still finishing close
org.apache.hadoop.hbase.DroppedSnapshotException: Failed clearing memory after
6 attempts on region: .
at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1108)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1046)
at
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:147)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
2017-03-20 11:02:21,467 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: RegionServer abort: loaded
coprocessors are: []
2017-03-20 11:02:21,528 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Unrecoverable
exception while closing region , still finishing close
2017-03-20 11:02:21,528 ERROR org.apache.hadoop.hbase.executor.EventHandler:
Caught throwable while processing event M_RS_CLOSE_REGION
java.lang.RuntimeException: org.apache.hadoop.hbase.DroppedSnapshotException:
Failed clearing memory after 6 attempts on region: .
at
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:161)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.hadoop.hbase.DroppedSnapshotException: Failed clearing
memory after 6 attempts on region: .
at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1108)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:1046)
at
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler.process(CloseRegionHandler.java:147)
... 4 more
2017-03-20 11:02:21,528 INFO org.apache.hadoop.ipc.RpcServer: Stopping server on
2017-03-20 11:02:21,531 INFO org.apache.hadoop.ipc.RpcServer:
RpcServer.listener,port=: stopping
2017-03-20 11:02:21,531 INFO org.apache.hadoop.ipc.RpcServer:
Priority.RpcServer.handler=0,port=: exiting
2017-03-20 11:02:21,531 INFO
org.apache.hadoop.hbase.regionserver.SplitLogWorker: Sending interrupt to stop
the worker thread
2017-03-20 11:02:21,531 INFO org.apache.hadoop.ipc.RpcServer:
Priority.RpcServer.handler=1,port=: exiting
...
2017-03-20 11:02:30,556 INFO org.apache.zookeeper.ZooKeeper: Session: closed
2017-03-20 11:02:30,556 INFO org.apache.zookeeper.ClientCnxn: EventThread shut
down
2017-03-20 11:02:30,556 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: stopping server ; zookeeper
connection closed.
2017-03-20 11:02:30,556 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: exiting
2017-03-20 11:02:30,556 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine: Region server
exiting
java.lang.RuntimeException: HRegionServer Aborted
at
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.start(HRegionServerCommandLine.java:66)
at
org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.run(HRegionServerCommandLine.java:85)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.main(HRegionServer.java:2340)
2017-03-20 11:02:30,593 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook:
Shutdown hook starting; hbase.shutdown.hook=true;
fsShutdownHook=org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@56ddd32a
2017-03-20 11:02:30,593 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Shutdown hook
2017-03-20 11:02:30,593 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook:
Starting fs shutdown hook thread.
2017-03-20 11:02:30,593 ERROR org.apache.hadoop.hdfs.DFSClient: Failed to close
file
java.net.SocketTimeoutException: 20000 millis timeout while waiting for channel
to be ready for read. ch : java.nio.channels.SocketChannel[connected local=
remote=]
at
org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:118)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at
org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:1984)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:1064)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1031)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1175)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:924)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:486)
2017-03-20 11:02:30,594 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook:
Shutdown hook finished.
[HMaster LOG]
2017-03-20 11:02:21,525 ERROR org.apache.hadoop.hbase.master.HMaster: Region
server reported a fatal error:
ABORTING region server : Unrecoverable exception while closing region , still
finishing close
2017-03-20 11:02:22,261 INFO org.apache.hadoop.hbase.master.RegionStates:
Offlined from
2017-03-20 11:02:22,723 INFO org.apache.hadoop.hbase.master.RegionStates:
Offlined from
2017-03-20 11:02:30,535 INFO
org.apache.hadoop.hbase.zookeeper.RegionServerTracker: RegionServer ephemeral
node deleted, processing expiration []
2017-03-20 11:02:31,165 INFO
org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Splitting logs
for before assignment.
Thanks,
Minwoo.
________________________________
보낸 사람: Ted Yu <yuzhih...@gmail.com>
보낸 날짜: 2017년 3월 20일 월요일 오후 12:10:46
받는 사람: user@hbase.apache.org
제목: Re: Why IOException occur when region server is closing
(CloseRegionHandler.java#L110)?
See HBASE-4270
Did you see this happen in your cluster ?
If so, mind sharing related log snippets ?
Cheers
On Sun, Mar 19, 2017 at 7:50 PM, Kang Minwoo <minwoo.k...@outlook.com>
wrote:
> Hello!
>
> In this code (https://github.com/apache/hbase/blob/master/hbase-
> server/src/main/java/org/apache/hadoop/hbase/regionserver/handler/
> CloseRegionHandler.java#L110),
> Region server can occur IOException, When they are closing.
> Why IOException occur here?
> If I want to know specific reason, Where I should check?
>
> Thanks,
> Minwoo.
>
>
