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From Ron van der Vegt <ron.van.der.v...@openindex.io>
Subject Re: Hbase unstable, master and regionservers crashes every night at ~ 00:07 UTC
Date Wed, 29 Oct 2014 12:05:29 GMT
Thanks all! We found the issue. Every night our server will create a 
snapshot backup. This was causing the problems. Thanks again :)


On wo, okt 29, 2014 at 6:25 , lars hofhansl <larsh@apache.org> wrote:
> We had an issue similar to this for a while. Every Sunday between 1am 
> and 6am we'd experience ZK timeouts.Turned out it was the weekly RAID 
> check across all our boxes that caused ZK to timeout.
> -- Lars
>       From: Ron van der Vegt <ron.van.der.vegt@openindex.io>
>  To: user@hbase.apache.org 
>  Sent: Tuesday, October 28, 2014 5:14 AM
>  Subject: Hbase unstable, master and regionservers crashes every 
> night at ~ 00:07 UTC
>    
> My setup is the following:
> 
> server1:
> - master
> - zookeeper
> 
> server2:
> - zookeeper
> 
> server3:
> - zookeeper
> 
> server 4 t/m 8
> - regionserver
> 
> HBase: hbase-0.98.7-hadoop1
> Zookeeper: zookeeper-3.4.6
> hadoop: 1.2.1
> 
> Every night at aprox 00:07 UTC the master and all the regionservers 
> will shutdown.
> When I monitor server1 with munin, I don't see any extra load 
> (io,memory,cpu) at that time.
> gc.log showed me that the garbage collection is also fast. See below 
> the compromised logs. I'm little bit out of options what is causing 
> this. Does anyone have a clue what is happening?
> 
> Thanks in advice,
> 
> Ron
> 
> 
> Logs master server1
> ===================
> 
> 2014-10-27 23:06:36,503 INFO 
> [master:vps2008:60000-SendThread(141.105.120.103:2181)] 
> zookeeper.ClientCnxn: Unable to read additional data from server 
> sessionid 0x1494ed899bd0211, likely server has closed socket, closing 
> socket connection and attempting reconnect
> 2014-10-27 23:06:37,035 INFO 
> [master:vps2008:60000-SendThread(141.105.120.102:2181)] 
> zookeeper.ClientCnxn: Opening socket connection to server 
> 141.105.120.102/141.105.120.102:2181. Will not attempt to 
> authenticate 
> using SASL (unknown error)
> 2014-10-27 23:06:37,036 INFO 
> [master:vps2008:60000-SendThread(141.105.120.102:2181)] 
> zookeeper.ClientCnxn: Socket connection established to 
> 141.105.120.102/141.105.120.102:2181, initiating session
> 2014-10-27 23:06:37,037 INFO 
> [master:vps2008:60000-SendThread(141.105.120.102:2181)] 
> zookeeper.ClientCnxn: Unable to read additional data from server 
> sessionid 0x1494ed899bd0211, likely server has closed socket, closing 
> socket connection and attempting reconnect
> 2014-10-27 23:06:37,583 INFO 
> [master:vps2008:60000-SendThread(141.105.121.127:2181)] 
> zookeeper.ClientCnxn: Opening socket connection to server 
> 141.105.121.127/141.105.121.127:2181. Will not attempt to 
> authenticate 
> using SASL (unknown error)
> 
> ......
> 
> 2014-10-27 23:47:35,881 INFO [JvmPauseMonitor] util.JvmPauseMonitor: 
> Detected pause in JVM or host machine (eg GC): pause of approximately 
> 1068ms
> No GCs detected
> 
> 5x probarly every regionserver:
> 
> 2014-10-27 23:47:35,937 WARN [RpcServer.reader=9,port=60000] 
> ipc.RpcServer: RpcServer.listener,port=60000: count of bytes read: 0
> java.io.IOException: Connection reset by peer
>         at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
>         at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
>         at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
>         at sun.nio.ch.IOUtil.read(IOUtil.java:197)
>         at 
> sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
>         at 
> org.apache.hadoop.hbase.ipc.RpcServer.channelRead(RpcServer.java:2244)
>         at 
> org.apache.hadoop.hbase.ipc.RpcServer$Connection.readAndProcess(RpcServer.java:1423)
>         at 
> org.apache.hadoop.hbase.ipc.RpcServer$Listener.doRead(RpcServer.java:798)
>         at 
> org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.doRunLoop(RpcServer.java:589)
>         at 
> org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.run(RpcServer.java:564)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> 
> .....
> 
> 2014-10-28 00:01:23,798 WARN [master:vps2008:60000.oldLogCleaner] 
> zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, 
> quorum=141.105.120.103:2181,141.105.120.102:2181,141.105.121.127:2181, 
> exception=org.apache.z
> ookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
> Session expired for /hbase/replication/rs
> 2014-10-28 00:01:23,798 ERROR [master:vps2008:60000.oldLogCleaner] 
> zookeeper.RecoverableZooKeeper: ZooKeeper getChildren failed after 4 
> attempts
> 2014-10-28 00:01:23,799 WARN [master:vps2008:60000.oldLogCleaner] 
> master.ReplicationLogCleaner: Aborting ReplicationLogCleaner because 
> Failed to get list of replicators
> org.apache.zookeeper.KeeperException$SessionExpiredException: 
> KeeperErrorCode = Session expired for /hbase/replication/rs
>         at 
> org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
>         at 
> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>         at 
> org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1472)
>         at 
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getChildren(RecoverableZooKeeper.java:296)
>         at 
> org.apache.hadoop.hbase.zookeeper.ZKUtil.listChildrenNoWatch(ZKUtil.java:573)
>         at 
> org.apache.hadoop.hbase.replication.ReplicationStateZKBase.getListOfReplicators(ReplicationStateZKBase.java:79)
>         at 
> org.apache.hadoop.hbase.replication.master.ReplicationLogCleaner.loadHLogsFromQueues(ReplicationLogCleaner.java:88)
>         at 
> org.apache.hadoop.hbase.replication.master.ReplicationLogCleaner.getDeletableFiles(ReplicationLogCleaner.java:67)
>         at 
> org.apache.hadoop.hbase.master.cleaner.CleanerChore.checkAndDeleteFiles(CleanerChore.java:233)
>         at 
> org.apache.hadoop.hbase.master.cleaner.CleanerChore.checkAndDeleteEntries(CleanerChore.java:157)
>         at 
> org.apache.hadoop.hbase.master.cleaner.CleanerChore.chore(CleanerChore.java:124)
>         at org.apache.hadoop.hbase.Chore.run(Chore.java:80)
>         at java.lang.Thread.run(Thread.java:745)
> 
> .....
> 
> 2014-10-28 00:06:05,997 ERROR 
> [MASTER_META_SERVER_OPERATIONS-vps2008:60000-0] 
> handler.MetaServerShutdownHandler: Caught M_META_SERVER_SHUTDOWN, 
> count=1
> java.io.IOException: failed log splitting for 
> vps2060.directvps.nl,60020,1414414327187, will retry
>         at 
> org.apache.hadoop.hbase.master.handler.MetaServerShutdownHandler.process(MetaServerShutdownHandler.java:84)
>         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: java.io.IOException: error or interrupted while splitting 
> logs in 
> [hdfs://namenode.openindex.io:8020/hbase/WALs/vps2060.directvps.nl,60020,1414414327187-splitting]

> Task = installed = 1 done = 0 error = 1
>         at 
> org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:359)
>         at 
> org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:416)
>         at 
> org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:308)
>         at 
> org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:299)
>         at 
> org.apache.hadoop.hbase.master.handler.MetaServerShutdownHandler.process(MetaServerShutdownHandler.java:77)
>         ... 4 more
> 2014-10-28 00:06:05,997 INFO 
> [MASTER_META_SERVER_OPERATIONS-vps2008:60000-1] 
> handler.MetaServerShutdownHandler: Splitting hbase:meta logs for 
> vps2060.directvps.nl,60020,1414414327187
> 2014-10-28 00:06:06,006 INFO 
> [MASTER_META_SERVER_OPERATIONS-vps2008:60000-1] 
> master.SplitLogManager: 
> dead splitlog workers [vps2060.directvps.nl,60020,1414414327187]
> 2014-10-28 00:06:06,021 INFO [main-EventThread] zookeeper.ClientCnxn: 
> EventThread shut down
> 2014-10-28 00:06:06,021 INFO [master:vps2008:60000] 
> zookeeper.ZooKeeper: Session: 0x1495400a0370000 closed
> 2014-10-28 00:06:06,021 INFO [master:vps2008:60000] master.HMaster: 
> HMaster main thread exiting
> 2014-10-28 00:06:06,022 ERROR [main] master.HMasterCommandLine: 
> Master 
> exiting
> java.lang.RuntimeException: HMaster Aborted
>         at 
> org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:194)
>         at 
> org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:135)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>         at 
> org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
> 
> 
> Logs of zookeeper server1:
> ==========================
> 
> 2014-10-27 23:06:36,562 [myid:2] - WARN 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:Follower@89] - Exception 
> when 
> following the leader
> java.net.SocketTimeoutException: Read timed out
>         at java.net.SocketInputStream.socketRead0(Native Method)
>         at java.net.SocketInputStream.read(SocketInputStream.java:152)
>         at java.net.SocketInputStream.read(SocketInputStream.java:122)
>         at 
> java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>         at 
> java.io.BufferedInputStream.read(BufferedInputStream.java:254)
>         at java.io.DataInputStream.readInt(DataInputStream.java:387)
>         at 
> org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
>         at 
> org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:83)
>         at 
> org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:103)
>         at 
> org.apache.zookeeper.server.quorum.Learner.readPacket(Learner.java:153)
>         at 
> org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:85)
>         at 
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:786)
> 2014-10-27 23:06:36,629 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:Follower@166] - shutdown 
> called
> java.lang.Exception: shutdown Follower
>         at 
> org.apache.zookeeper.server.quorum.Follower.shutdown(Follower.java:166)
>         at 
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:790)
> 2014-10-27 23:06:36,630 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:FollowerZooKeeperServer@139] 
> - 
> Shutting down
> 2014-10-27 23:06:36,630 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:ZooKeeperServer@441] - 
> shutting down
> 2014-10-27 23:06:36,630 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:FollowerRequestProcessor@105] 
> - Shutting down
> 2014-10-27 23:06:36,631 [myid:2] - INFO 
> [FollowerRequestProcessor:2:FollowerRequestProcessor@95] - 
> FollowerRequestProcessor exited loop!
> 2014-10-27 23:06:36,632 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:CommitProcessor@181] - 
> Shutting down
> 2014-10-27 23:06:36,632 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:FinalRequestProcessor@415] - 
> shutdown of request processor complete
> 2014-10-27 23:06:36,632 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:SyncRequestProcessor@209] - 
> Shutting down
> 2014-10-27 23:06:36,633 [myid:2] - INFO 
> [SyncThread:2:SyncRequestProcessor@187] - SyncRequestProcessor exited!
> 2014-10-27 23:06:36,633 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumPeer@714] - LOOKING
> 2014-10-27 23:06:36,635 [myid:2] - INFO 
> [CommitProcessor:2:CommitProcessor@150] - CommitProcessor exited loop!
> 2014-10-27 23:06:36,716 [myid:2] - INFO 
> [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:FileSnap@83] - Reading 
> snapshot /opt/zookeeper/data/version-2/snapshot.ed00000df4
> 2014-10-27 23:06:36,774 [myid:2] - INFO 
> [WorkerReceiver[myid=2]:FastLeaderElection@597] - Notification: 1 
> (message format version), 1 (n.leader), 0xed00000e01 (n.zxid), 0xf9 
> (n.round), LOOKING (n.state), 1 (n.sid), 0xed (
> n.peerEpoch) LOOKING (my state)
> 2014-10-27 23:06:36,816 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] 
> - 
> Accepted socket connection from /141.105.120.150:47142
> 2014-10-27 23:06:36,844 [myid:2] - WARN 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - 
> Exception causing close of session 0x0 due to java.io.IOException: 
> ZooKeeperServer not running
> 2014-10-27 23:06:36,845 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - 
> Closed 
> socket connection for client /141.105.120.150:47142 (no session 
> established for client)
> 
> .....
> 
> 2014-10-28 00:07:18,464 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@868] - 
> Client attempting to establish new session at /141.105.125.180:56530
> 2014-10-28 00:07:18,468 [myid:2] - INFO 
> [CommitProcessor:2:ZooKeeperServer@617] - Established session 
> 0x24954020e470268 with negotiated timeout 6000 for client 
> /141.105.125.180:56530
> 2014-10-28 00:07:18,483 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - 
> Closed 
> socket connection for client /141.105.125.180:56530 which had 
> sessionid 
> 0x24954020e470268
> 2014-10-28 00:07:18,632 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] 
> - 
> Accepted socket connection from /178.21.116.224:45958
> 2014-10-28 00:07:18,632 [myid:2] - WARN 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@822] - 
> Connection request from old client /178.21.116.224:45958; will be 
> dropped if server is in r-o mode
> 2014-10-28 00:07:18,632 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@868] - 
> Client attempting to establish new session at /178.21.116.224:45958
> 2014-10-28 00:07:18,636 [myid:2] - INFO 
> [CommitProcessor:2:ZooKeeperServer@617] - Established session 
> 0x24954020e470269 with negotiated timeout 6000 for client 
> /178.21.116.224:45958
> 2014-10-28 00:07:18,650 [myid:2] - WARN 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - 
> caught 
> end of stream exception
> EndOfStreamException: Unable to read additional data from client 
> sessionid 0x24954020e470269, likely client has closed socket
>         at 
> org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
>         at 
> org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
>         at java.lang.Thread.run(Thread.java:745)
> 2014-10-28 00:07:18,651 [myid:2] - INFO 
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - 
> Closed 
> socket connection for client /178.21.116.224:45958 which had 
> sessionid 
> 0x24954020e470269
> 
> Gc log server1 (date and time may differ, but same result is shown at 
> time of problem)
> ======================================================================================
> 
> 2014-10-23T07:39:02.597+0000: 0.334: [GC2014-10-23T07:39:02.597+0000: 
> 0.334: [ParNew: 4288K->512K(4800K), 0.0068790 secs] 
> 4288K->1288K(15424K), 0.0069880 secs] [Times: user=0.01 sys=0.00, 
> real=0.01 secs] 
> 2014-10-23T07:39:02.676+0000: 0.413: [GC2014-10-23T07:39:02.676+0000: 
> 0.413: [ParNew: 4800K->511K(4800K), 0.0136860 secs] 
> 5576K->2274K(15424K), 0.0137620 secs] [Times: user=0.01 sys=0.01, 
> real=0.01 secs] 
> 2014-10-23T07:39:02.759+0000: 0.496: [GC2014-10-23T07:39:02.759+0000: 
> 0.496: [ParNew: 4790K->511K(4800K), 0.0039330 secs] 
> 6553K->2582K(15424K), 0.0040040 secs] [Times: user=0.01 sys=0.00, 
> real=0.01 secs] 
> 
> ...
> 
> 2014-10-23T07:39:03.621+0000: 1.358: [GC2014-10-23T07:39:03.621+0000: 
> 1.358: [ParNew: 4799K->512K(4800K), 0.0022680 secs] 
> 9184K->5281K(15424K), 0.0023360 secs] [Times: user=0.00 sys=0.00, 
> real=0.01 secs] 
> 2014-10-23T07:39:03.803+0000: 1.540: [GC2014-10-23T07:39:03.803+0000: 
> 1.540: [ParNew: 4800K->512K(4800K), 0.0018700 secs] 
> 9569K->5586K(15424K), 0.0019370 secs] [Times: user=0.00 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:39:03.915+0000: 1.652: [GC2014-10-23T07:39:03.915+0000: 
> 1.652: [ParNew: 4800K->512K(4800K), 0.0019160 secs] 
> 9874K->6010K(15424K), 0.0019840 secs] [Times: user=0.00 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:39:03.918+0000: 1.654: [GC [1 CMS-initial-mark: 
> 5498K(10624K)] 6010K(15424K), 0.0041480 secs] [Times: user=0.00 
> sys=0.00, real=0.01 secs] 
> 2014-10-23T07:39:03.922+0000: 1.659: [CMS-concurrent-mark-start]
> 2014-10-23T07:39:03.964+0000: 1.701: [CMS-concurrent-mark: 
> 0.038/0.042 
> secs] [Times: user=0.09 sys=0.00, real=0.04 secs] 
> 2014-10-23T07:39:03.964+0000: 1.701: [CMS-concurrent-preclean-start]
> 2014-10-23T07:39:03.965+0000: 1.702: [CMS-concurrent-preclean: 
> 0.001/0.001 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:39:03.971+0000: 1.708: [GC[YG occupancy: 1582 K (4800 
> K)]2014-10-23T07:39:03.971+0000: 1.708: [Rescan (parallel) , 
> 0.0013900 
> secs]2014-10-23T07:39:03.972+0000: 1.709: [weak refs processing, 
> 0.0000240 secs]2014-10-23T07:39:03.973+0000: 1.709: [scrub string 
> table, 0.0001890 secs] [1 CMS-remark: 5498K(10624K)] 7081K(15424K), 
> 0.0016880 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:39:03.973+0000: 1.710: [CMS-concurrent-sweep-start]
> 2014-10-23T07:39:03.974+0000: 1.711: [CMS-concurrent-sweep: 
> 0.001/0.001 
> secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:39:03.974+0000: 1.711: [CMS-concurrent-reset-start]
> 2014-10-23T07:39:04.086+0000: 1.823: [GC2014-10-23T07:39:04.086+0000: 
> 1.823: [ParNew: 4800K->512K(4800K), 0.0016370 secs] 
> 7380K->3450K(15424K), 0.0017180 secs] [Times: user=0.01 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:39:04.146+0000: 1.883: [CMS-concurrent-reset: 
> 0.170/0.172 
> secs] [Times: user=0.11 sys=0.16, real=0.17 secs] 
> 2014-10-23T07:39:04.194+0000: 1.931: [GC2014-10-23T07:39:04.194+0000: 
> 1.931: [ParNew: 4799K->512K(4800K), 0.0015060 secs] 
> 7737K->3610K(15424K), 0.0015850 secs] [Times: user=0.00 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:39:04.347+0000: 2.084: [GC2014-10-23T07:39:04.347+0000: 
> 2.084: [ParNew: 4800K->511K(4800K), 0.0019550 secs] 
> 7898K->3849K(15424K), 0.0020250 secs] [Times: user=0.01 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:39:04.430+0000: 2.167: [GC2014-10-23T07:39:04.431+0000: 
> 2.167: [ParNew: 4799K->495K(4800K), 0.0021720 secs] 
> 8137K->3981K(15424K), 0.0022710 secs] [Times: user=0.01 sys=0.00, 
> real=0.01 secs]
> 
> ....
> 
> secs] 
> 2014-10-23T07:40:05.961+0000: 63.698: 
> [GC2014-10-23T07:40:05.961+0000: 
> 63.698: [ParNew: 4649K->511K(4800K), 0.0028340 secs] 
> 13309K->9479K(15424K), 0.0029510 secs] [Times: user=0.01 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:40:14.198+0000: 71.935: 
> [GC2014-10-23T07:40:14.198+0000: 
> 71.935: [ParNew: 4799K->511K(4800K), 0.0029840 secs] 
> 13767K->9895K(15424K), 0.0030750 secs] [Times: user=0.01 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:40:14.289+0000: 72.025: 
> [GC2014-10-23T07:40:14.289+0000: 
> 72.026: [ParNew: 4799K->512K(4800K), 0.0023430 secs] 
> 14183K->10375K(15424K), 0.0024230 secs] [Times: user=0.01 sys=0.00, 
> real=0.01 secs] 
> 2014-10-23T07:40:14.291+0000: 72.028: [GC [1 CMS-initial-mark: 
> 9863K(10624K)] 10383K(15424K), 0.0009020 secs] [Times: user=0.00 
> sys=0.00, real=0.00 secs] 
> 2014-10-23T07:40:14.292+0000: 72.029: [CMS-concurrent-mark-start]
> 2014-10-23T07:40:14.322+0000: 72.059: [CMS-concurrent-mark: 
> 0.030/0.030 
> secs] [Times: user=0.06 sys=0.00, real=0.03 secs] 
> 2014-10-23T07:40:14.322+0000: 72.059: [CMS-concurrent-preclean-start]
> 2014-10-23T07:40:14.322+0000: 72.059: [CMS-concurrent-preclean: 
> 0.000/0.000 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:40:14.322+0000: 72.059: 
> [CMS-concurrent-abortable-preclean-start]
>  CMS: abort preclean due to time 2014-10-23T07:40:19.353+0000: 
> 77.090: 
> [CMS-concurrent-abortable-preclean: 0.089/5.030 secs] [Times: 
> user=0.11 
> sys=0.01, real=5.03 secs] 
> 2014-10-23T07:40:19.353+0000: 77.090: [GC[YG occupancy: 3651 K (4800 
> K)]2014-10-23T07:40:19.354+0000: 77.091: [Rescan (parallel) , 
> 0.0020850 
> secs]2014-10-23T07:40:19.356+0000: 77.093: [weak refs processing, 
> 0.0001570 secs]2014-10-23T07:40:19.356+0000: 77.093: [scrub string 
> table, 0.0004000 secs] [1 CMS-remark: 9863K(10624K)] 13514K(15424K), 
> 0.0034860 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:40:19.357+0000: 77.094: [CMS-concurrent-sweep-start]
> 2014-10-23T07:40:19.360+0000: 77.097: [CMS-concurrent-sweep: 
> 0.003/0.003 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
> 2014-10-23T07:40:19.361+0000: 77.097: [CMS-concurrent-reset-start]
> 2014-10-23T07:40:19.362+0000: 77.099: [CMS-concurrent-reset: 
> 0.001/0.001 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 
> 2014-10-23T07:41:56.874+0000: 174.611: 
> [GC2014-10-23T07:41:56.875+0000: 
> 174.611: [ParNew: 4800K->512K(4800K), 0.0021740 secs] 
> 10761K->6828K(15424K), 0.0022740 secs] [Times: user=0.01 sys=0.00, 
> real=0.00 secs] 
> 2014-10-23T07:47:21.160+0000: 498.897: 
> [GC2014-10-23T07:47:21.160+0000: 
> 498.897: [ParNew: 4800K->286K(4800K), 0.0025590 secs] 
> 11116K->7045K(15424K), 0.0026680 secs] [Times: user=0.00 sys=0.00, 
> real=0.01 secs] 
> 
> ...
> 
> 2014-10-23T08:39:29.672+0000: 3627.409: 
> [GC2014-10-23T08:39:29.672+0000: 3627.409: [ParNew: 
> 4705K->512K(4800K), 
> 0.0045100 secs] 12027K->8045K(15424K), 0.0046410 secs] [Times: 
> user=0.01 sys=0.00, real=0.00 secs] 
> 2014-10-23T08:45:08.685+0000: 3966.422: 
> [GC2014-10-23T08:45:08.686+0000: 3966.422: [ParNew: 
> 4800K->478K(4800K), 
> 0.0035990 secs] 12333K->8609K(15424K), 0.0036800 secs] [Times: 
> user=0.01 sys=0.00, real=0.00 secs] 
> Heap
>  par new generation total 4800K, used 827K [0x00000000b7200000, 
> 0x00000000b7730000, 0x00000000c1860000)
>   eden space 4288K, 8% used [0x00000000b7200000, 0x00000000b72573b0, 
> 0x00000000b7630000)
>   from space 512K, 93% used [0x00000000b76b0000, 0x00000000b7727980, 
> 0x00000000b7730000)
>   to space 512K, 0% used [0x00000000b7630000, 0x00000000b7630000, 
> 0x00000000b76b0000)
>  concurrent mark-sweep generation total 10624K, used 8130K 
> [0x00000000c1860000, 0x00000000c22c0000, 0x00000000f5a00000)
>  concurrent-mark-sweep perm gen total 50636K, used 30752K 
> [0x00000000f5a00000, 0x00000000f8b73000, 0x0000000100000000)
> 
> 
> 
> 
> 
>   


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