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zookeeper log full of WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception

zookeeper log full of WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception

Contributor

RedHat 6.7

 

Parcel: 5.7.0-1.cdh5.7.0.p0.45

 

RPMs:

cloudera-manager-server-5.7.0-1.cm570.p0.76.el6.x86_64
cloudera-manager-agent-5.7.0-1.cm570.p0.76.el6.x86_64
cloudera-manager-daemons-5.7.0-1.cm570.p0.76.el6.x86_64

 

host monitor is running and the cluster is green, no issues.

 

saw other posts relating to this warn message, but in our case the system was created recently and basically doing nothing.  runs impala and shared filesystem.  so far do not observe any failures of either of these features.

 

please advise on how to repair this issue and determine what failures this might be causing.

 

the event log full of chatter/noise, and this is one of the issues reported over and over.

 

2016-08-24 15:55:48,385 INFO org.apache.zookeeper.server.ZooKeeperServer: Client attempting to establish new session at /10.10.10.120:53028
2016-08-24 15:55:48,387 INFO org.apache.zookeeper.server.ZooKeeperServer: Established session 0x3567b06b3cc5dd5 with negotiated timeout 30000 for client /10.10.10.120:53028
2016-08-24 15:55:48,404 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /10.10.10.120:53032
2016-08-24 15:55:48,406 INFO org.apache.zookeeper.server.ZooKeeperServer: Client attempting to establish new session at /10.10.10.120:53032
2016-08-24 15:55:48,407 INFO org.apache.zookeeper.server.ZooKeeperServer: Established session 0x3567b06b3cc5dd6 with negotiated timeout 30000 for client /10.10.10.120:53032
2016-08-24 15:55:48,440 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x1567b06b3ce5ea6
2016-08-24 15:55:48,441 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x3567b06b3cc5dd6
2016-08-24 15:55:48,442 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /10.10.10.120:53032 which had sessionid 0x3567b06b3cc5dd6
2016-08-24 15:55:48,443 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x2567b0773d75e32
2016-08-24 15:55:48,448 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x3567b06b3cc5dd5
2016-08-24 15:55:48,449 WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x3567b06b3cc5dd5, likely client has closed socket
at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:220)
at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
at java.lang.Thread.run(Unknown Source)
2016-08-24 15:55:48,449 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /10.10.10.120:53028 which had sessionid 0x3567b06b3cc5dd5
2016-08-24 15:56:48,413 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /10.10.10.120:53180
2016-08-24 15:56:48,413 INFO org.apache.zookeeper.server.ZooKeeperServer: Client attempting to establish new session at /10.10.10.120:53180
2016-08-24 15:56:48,414 INFO org.apache.zookeeper.server.ZooKeeperServer: Established session 0x3567b06b3cc5dd7 with negotiated timeout 30000 for client /10.10.10.120:53180
2016-08-24 15:56:48,450 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x1567b06b3ce5ea8
2016-08-24 15:56:48,455 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x3567b06b3cc5dd7
2016-08-24 15:56:48,456 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /10.10.10.120:53180 which had sessionid 0x3567b06b3cc5dd7
2016-08-24 15:56:48,456 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x2567b0773d75e33
2016-08-24 15:56:48,459 INFO org.apache.zookeeper.server.PrepRequestProcessor: Processed session termination for sessionid: 0x1567b06b3ce5ea7
2016-08-24 15:57:53,389 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /10.10.10.120:53342
2016-08-24 15:57:53,390 INFO org.apache.zookeeper.server.ZooKeeperServer: Client attempting to establish new session at /10.10.10.120:53342
2016-08-24 15:57:53,391 INFO org.apache.zookeeper.server.ZooKeeperServer: Established session 0x3567b06b3cc5dd8 with negotiated timeout 30000 for client /10.10.10.120:53342
2016-08-24 15:57:53,416 INFO org.apache.zookeeper.server.NIOServerCnxnFactory: Accepted socket connection from /10.10.10.120:53348

2 REPLIES 2
Highlighted

Re: zookeeper log full of WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream excep

Contributor

bump

Re: zookeeper log full of WARN org.apache.zookeeper.server.NIOServerCnxn: caught end of stream excep

Rising Star

Does it cause any kind of issue? Looks like some kind of network connection issue, or maybe services are restarted. If connection are broken the services and clients usually attempt to reconnection. Unless there's so much logging that it slows down your service, it shouldn't be a problem I think.

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