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zookeeper频繁异常问题分析_eventthread shut down
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1.1 操作系统信息
1.1.1 CPU信息
从上述可以看出在问题点CPU使用率并不高，故排除CPU问题。
1.1.2 内存信息
CM监控界面并无内存信息，无法提供图片。
但问题期间，监控机器内存，发现还有剩余，故排除内存问题。
1.2 ZKFAILOVER日志信息
2017-09-0109:45:57,390 INFO org.apache.zookeeper.ClientCnxn: Client session timed out,have not heard from server in 1668ms for sessionid 0x0, closing socketconnection and attempting reconnect
2017-09-01 09:45:58,224 ERRORorg.apache.hadoop.ha.ActiveStandbyElector: Connection timed out: couldn'tconnect to ZooKeeper in 5000 milliseconds
2017-09-0109:45:58,450 INFO org.apache.zookeeper.ZooKeeper: Session: 0x0 closed
2017-09-0109:45:58,450 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down
2017-09-0109:45:58,451 WARN org.apache.hadoop.ha.ActiveStandbyElector:org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode =ConnectionLoss
2017-09-0109:46:03,453 INFO org.apache.zookeeper.ZooKeeper: Initiating client connection,connectString=test-ssps-s-02:2181,test-ssps-s-03:2181,test-ssps-s-04:2181sessionTimeout=5000watcher=org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef@7f0d36c
2017-09-0109:46:03,455 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection toserver test-ssps-s-04/10.117.210.216:2181. Will not attempt to authenticateusing SASL (unknown error)
2017-09-0109:46:03,463 INFO org.apache.zookeeper.ClientCnxn: Socket connectionestablished to test-ssps-s-04/10.117.210.216:2181, initiating session
2017-09-0109:46:05,131 INFO org.apache.zookeeper.ClientCnxn: Client session timed out,have not heard from server in 1668ms for sessionid 0x0, closing socketconnection and attempting reconnect
2017-09-0109:46:05,885 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection toserver test-ssps-s-03/10.51.20.155:2181. Will not attempt to authenticate usingSASL (unknown error)
2017-09-0109:46:06,626 INFO org.apache.zookeeper.ClientCnxn: Socket connectionestablished to test-ssps-s-03/10.51.20.155:2181, initiating session
2017-09-0109:46:08,293 INFO org.apache.
