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Mahadev konar edited comment on ZOOKEEPER-344 at 3/18/09 2:17 PM: ------------------------------------------------------------------ {noformat} ERROR [main-EventThread] com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. New state: Expired : zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1160/locknode ERROR [main-EventThread] com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. New state: Expired : zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1356/locknode {noformat} can you post corresponding session id's with these ? and also the logs related to their session closing with the timestamps (on the server side). was (Author: mahadev): {noformat} ERROR [main-EventThread] com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. New state: Expired : zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1160/locknode ERROR [main-EventThread] com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. New state: Expired : zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1356/locknode {noformat} can you post corresponding session id's with these ? and also the logs related to their session closing with the timestamps. > doIO in NioServerCnxn: Exception causing close of session : cause is "read > error" > --------------------------------------------------------------------------------- > > Key: ZOOKEEPER-344 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-344 > Project: Zookeeper > Issue Type: Bug > Components: java client > Affects Versions: 3.1.0 > Environment: jdk1.6.0_07 > Linux blade2 2.6.27.7-134.fc10.x86_64 #1 SMP Mon Dec 1 22:21:35 EST 2008 > x86_64 x86_64 x86_64 GNU/Linux > Reporter: bryan thompson > > I have been having a problem with zookeeper 3.0.1 and now with 3.1.0 where I > see a lot of expired sessions. I am using a 16 node cluster which is all on > the same local network. There is a single zookeeper instance (these are > benchmarking runs). > The problem appears to be correlated with either run time or system load.\ > Personally I think that it is system load because I have session session > expired events under a Windows platform running zookeeper and the application > (i.e., everthing is local) when the application load suddenly spikes. To me > this suggests that the client is not able to renew (ping) the zookeeper > service in a timely manner and is expired. But the log messages below with > the "read error" suggest that maybe there is something else going on? > Zookeeper Configuration > #Wed Mar 18 12:41:05 GMT-05:00 2009 > clientPort=2181 > dataDir=/var/bigdata/benchmark/zookeeper/1 > syncLimit=2 > dataLogDir=/var/bigdata/benchmark/zookeeper/1 > tickTime=2000 > Some representative log messages are below. > Client side messages (from our app) > ERROR [main-EventThread] > com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) > 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. > New state: Expired : > zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1160/locknode > ERROR [main-EventThread] > com.bigdata.zookeeper.ZLockImpl$ZLockWatcher.process(ZLockImpl.java:400) > 2009-03-18 13:35:40,335 - Session expired: WatchedEvent: Server state change. > New state: Expired : > zpath=/benchmark/jobs/com.bigdata.service.jini.benchmark.ThroughputMaster/test_1/client1356/locknode > Server side messages: > WARN [NIOServerCxn.Factory:2181] > org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:417) > 2009-03-18 13:06:57,252 - Exception causing close of session > 0x1201aac14300022 due to java.io.IOException: Read error > WARN [NIOServerCxn.Factory:2181] > org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:417) > 2009-03-18 13:06:58,198 - Exception causing close of session > 0x1201aac1430000f due to java.io.IOException: Read error -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.