Re: zookeeper connection issue while running for second time
Hi , I am able to run apache giraph successfully with around 500M pairs to find Connected components. It works great but not always, the issue seems to be with the time out zookeeper time out. Some of the client(around 5-10 ) out of 100, produces this error and the master fails due to this.Do you have any suggestions for this error. Any suggestions will be appreaciated. 2013-10-02 01:20:43,651 WARN org.apache.giraph.bsp.BspService: process: Disconnected from ZooKeeper (will automatically try to recover) WatchedEvent state:Disconnected type:None path:null 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server had22.rsk.admobius.com/10.240.51.32:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration) 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to had22.rsk.admobius.com/10.240.51.32:2181, initiating session 2013-10-02 01:20:44,037 INFO org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x441604c97412331 has expired, closing socket connection 2013-10-02 01:20:44,037 WARN org.apache.giraph.bsp.BspService: process: Got unknown null path event WatchedEvent state:Expired type:None path:null 2013-10-02 01:20:44,038 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 2013-10-02 01:21:20,046 INFO org.apache.giraph.worker.VertexInputSplitsCallable: readVertexInputSplit: Loaded 25 vertices at 1827.2925619484213 vertices/sec 1728790 edges at 12636.730317550928 edges/sec Memory (free/total/max) = 1745.60M / 2262.19M / 2730.69M 2013-10-02 01:21:24,788 INFO org.apache.giraph.worker.InputSplitsCallable: loadFromInputSplit: Finished loading /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601 (v=261131, e=1808572) 2013-10-02 01:21:24,789 ERROR org.apache.giraph.utils.LogStacktraceCallable: Execution of callable failed java.lang.IllegalStateException: markInputSplitPathFinished: KeeperException on /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:168) at org.apache.giraph.worker.InputSplitsCallable.loadInputSplit(InputSplitsCallable.java:226) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:161) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:58) at org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.zookeeper.KeeperException.create(KeeperException.java:127) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783) at org.apache.giraph.zk.ZooKeeperExt.createExt(ZooKeeperExt.java:152) at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:159) ... 9 more -- Best Regards, Jyotirmoy Sundi Admobius San Francisco, CA 94158 On Thu, Sep 26, 2013 at 6:08 PM, Jyotirmoy Sundi sundi...@gmail.com wrote: Hi , I got the connected component working for 1B nodes, but when I run the job again, it fails with the below error. Aprt form this in zookeeper the data is not cleared in the data directory. For successful jobs the data in zookeper from giraph is cleared. The following errors seems to be coming because the node tries to connect to the zookeeper with a session id which is cleared as seens in Client session timed out, have not heard from server in 68845ms for sessionid 0x3415cc6ce930059, closing socket connection and attempting reconnect , Any idea if increasing the session time out will be good ? 2013-09-27 00:57:11,748 WARN org.apache.giraph.bsp.BspService: process: Got unknown null path event WatchedEvent state:Expired type:None path:null 2013-09-27 00:57:11,748 INFO org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x3415cc6ce930059 has expired, closing socket connection 2013-09-27 00:57:11,748 WARN org.apache.giraph.worker.InputSplitsHandler: process: Problem with zookeeper, got event with path null, state Expired, event type None 2013-09-27 00:57:11,748 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 2013-09-27 00:57:11,925 INFO
Re: zookeeper connection issue while running for second time
We did have this error a few times. This can happen due to GC pauses, so I would check the worker for long GC issues. Also, you can increase the ZooKeeper timeouts, see /** ZooKeeper session millisecond timeout */ IntConfOption ZOOKEEPER_SESSION_TIMEOUT = new IntConfOption(giraph.zkSessionMsecTimeout, MINUTES.toMillis(1), ZooKeeper session millisecond timeout); Currently, the default is one minute, but in production we set that number much, much higher (even greater than a day sometimes) to avoid the disconnection. Hope that helps, Avery On 10/1/13 6:27 PM, Jyotirmoy Sundi wrote: Hi , I am able to run apache giraph successfully with around 500M pairs to find Connected components. It works great but not always, the issue seems to be with the time out zookeeper time out. Some of the client(around 5-10 ) out of 100, produces this error and the master fails due to this.Do you have any suggestions for this error. Any suggestions will be appreaciated. 2013-10-02 01:20:43,651 WARN org.apache.giraph.bsp.BspService: process: Disconnected from ZooKeeper (will automatically try to recover) WatchedEvent state:Disconnected type:None path:null 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to serverhad22.rsk.admobius.com/10.240.51.32:2181 http://had22.rsk.admobius.com/10.240.51.32:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration) 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Socket connection established tohad22.rsk.admobius.com/10.240.51.32:2181 http://had22.rsk.admobius.com/10.240.51.32:2181, initiating session 2013-10-02 01:20:44,037 INFO org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x441604c97412331 has expired, closing socket connection 2013-10-02 01:20:44,037 WARN org.apache.giraph.bsp.BspService: process: Got unknown null path event WatchedEvent state:Expired type:None path:null 2013-10-02 01:20:44,038 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 2013-10-02 01:21:20,046 INFO org.apache.giraph.worker.VertexInputSplitsCallable: readVertexInputSplit: Loaded 25 vertices at 1827.2925619484213 vertices/sec 1728790 edges at 12636.730317550928 edges/sec Memory (free/total/max) = 1745.60M / 2262.19M / 2730.69M 2013-10-02 01:21:24,788 INFO org.apache.giraph.worker.InputSplitsCallable: loadFromInputSplit: Finished loading /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601 (v=261131, e=1808572) 2013-10-02 01:21:24,789 ERROR org.apache.giraph.utils.LogStacktraceCallable: Execution of callable failed java.lang.IllegalStateException: markInputSplitPathFinished: KeeperException on /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:168) at org.apache.giraph.worker.InputSplitsCallable.loadInputSplit(InputSplitsCallable.java:226) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:161) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:58) at org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.zookeeper.KeeperException.create(KeeperException.java:127) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783) at org.apache.giraph.zk.ZooKeeperExt.createExt(ZooKeeperExt.java:152) at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:159) ... 9 more -- Best Regards, Jyotirmoy Sundi Admobius San Francisco, CA 94158 On Thu, Sep 26, 2013 at 6:08 PM, Jyotirmoy Sundi sundi...@gmail.com mailto:sundi...@gmail.com wrote: Hi , I got the connected component working for 1B nodes, but when I run the job again, it fails with the below error. Aprt form this in zookeeper the data is not cleared in the data directory. For successful jobs the data in zookeper from giraph is cleared. The following errors seems to be coming because the node tries to connect to the zookeeper with a session id which is cleared as seens in Client session timed out, have not heard from server in 68845ms for sessionid
Re: zookeeper connection issue while running for second time
Thanks a lot Avery for your response, I increased the timeout to 10 minutes *changed:* -Dgiraph.zkSessionMsecTimeout=60 and -Dgiraph.useInputSplitLocality=false , It is working for consecutive runs now without any errors. Thanks Sundi On Tue, Oct 1, 2013 at 10:18 PM, Avery Ching ach...@apache.org wrote: We did have this error a few times. This can happen due to GC pauses, so I would check the worker for long GC issues. Also, you can increase the ZooKeeper timeouts, see /** ZooKeeper session millisecond timeout */ IntConfOption ZOOKEEPER_SESSION_TIMEOUT = new IntConfOption(giraph.zkSessionMsecTimeout, MINUTES.toMillis(1), ZooKeeper session millisecond timeout); Currently, the default is one minute, but in production we set that number much, much higher (even greater than a day sometimes) to avoid the disconnection. Hope that helps, Avery On 10/1/13 6:27 PM, Jyotirmoy Sundi wrote: Hi , I am able to run apache giraph successfully with around 500M pairs to find Connected components. It works great but not always, the issue seems to be with the time out zookeeper time out. Some of the client(around 5-10 ) out of 100, produces this error and the master fails due to this.Do you have any suggestions for this error. Any suggestions will be appreaciated. 2013-10-02 01:20:43,651 WARN org.apache.giraph.bsp.BspService: process: Disconnected from ZooKeeper (will automatically try to recover) WatchedEvent state:Disconnected type:None path:null 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server had22.rsk.admobius.com/10.240.51.32:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration) 2013-10-02 01:20:44,035 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to had22.rsk.admobius.com/10.240.51.32:2181, initiating session 2013-10-02 01:20:44,037 INFO org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x441604c97412331 has expired, closing socket connection 2013-10-02 01:20:44,037 WARN org.apache.giraph.bsp.BspService: process: Got unknown null path event WatchedEvent state:Expired type:None path:null 2013-10-02 01:20:44,038 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 2013-10-02 01:21:20,046 INFO org.apache.giraph.worker.VertexInputSplitsCallable: readVertexInputSplit: Loaded 25 vertices at 1827.2925619484213 vertices/sec 1728790 edges at 12636.730317550928 edges/sec Memory (free/total/max) = 1745.60M / 2262.19M / 2730.69M 2013-10-02 01:21:24,788 INFO org.apache.giraph.worker.InputSplitsCallable: loadFromInputSplit: Finished loading /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601 (v=261131, e=1808572) 2013-10-02 01:21:24,789 ERROR org.apache.giraph.utils.LogStacktraceCallable: Execution of callable failed java.lang.IllegalStateException: markInputSplitPathFinished: KeeperException on /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:168) at org.apache.giraph.worker.InputSplitsCallable.loadInputSplit(InputSplitsCallable.java:226) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:161) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:58) at org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /_hadoopBsp/job_201309260044_1132/_vertexInputSplitDir/601/_vertexInputSplitFinished at org.apache.zookeeper.KeeperException.create(KeeperException.java:127) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783) at org.apache.giraph.zk.ZooKeeperExt.createExt(ZooKeeperExt.java:152) at org.apache.giraph.worker.InputSplitsHandler.markInputSplitPathFinished(InputSplitsHandler.java:159) ... 9 more -- Best Regards, Jyotirmoy Sundi Admobius San Francisco, CA 94158 On Thu, Sep 26, 2013 at 6:08 PM, Jyotirmoy Sundi sundi...@gmail.comwrote: Hi , I got the connected component working for 1B nodes, but when I run the job again, it fails with the below error. Aprt form this in zookeeper the data is not cleared in the data directory. For successful jobs the data in zookeper from giraph is
