[ https://issues.apache.org/jira/browse/ZOOKEEPER-1208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13149783#comment-13149783 ]
Patrick Hunt commented on ZOOKEEPER-1208: ----------------------------------------- @camille I'm usually fine with leaving printlns in tests (I look at the eclipse console), but I'm also fine if you want to convert them to info level logs. > Ephemeral node not removed after the client session is long gone > ---------------------------------------------------------------- > > Key: ZOOKEEPER-1208 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1208 > Project: ZooKeeper > Issue Type: Bug > Affects Versions: 3.3.3 > Reporter: kishore gopalakrishna > Assignee: Patrick Hunt > Priority: Blocker > Fix For: 3.3.4, 3.4.0, 3.5.0 > > Attachments: ZOOKEEPER-1208_br33.patch, ZOOKEEPER-1208_br33.patch, > ZOOKEEPER-1208_br34.patch, ZOOKEEPER-1208_trunk.patch > > > Copying from email thread. > We found our ZK server in a state where an ephemeral node still exists after > a client session is long gone. I used the cons command on each ZK host to > list all connections and couldn't find the ephemeralOwner id. We are using > ZK 3.3.3. Has anyone seen this problem? > I got the following information from the logs. > The node that still exists is > /kafka-tracking/consumers/UserPerformanceEvent-<host>/owners/UserPerformanceEvent/529-7 > I saw that the ephemeral owner is 86167322861045079 which is session id > 0x13220b93e610550. > After searching in the transaction log of one of the ZK servers found that > session expired > 9/22/11 12:17:57 PM PDT session 0x13220b93e610550 cxid 0x74 zxid 0x601bd36f7 > closeSession null > On digging further into the logs I found that there were multiple sessions > created in quick succession and every session tried to create the same node. > But i verified that the sessions were closed and opened in order > 9/22/11 12:17:56 PM PDT session 0x13220b93e610550 cxid 0x0 zxid 0x601bd36b5 > createSession 6000 > 9/22/11 12:17:57 PM PDT session 0x13220b93e610550 cxid 0x74 zxid 0x601bd36f7 > closeSession null > 9/22/11 12:17:58 PM PDT session 0x13220b93e610551 cxid 0x0 zxid 0x601bd36f8 > createSession 6000 > 9/22/11 12:17:59 PM PDT session 0x13220b93e610551 cxid 0x74 zxid 0x601bd373a > closeSession null > 9/22/11 12:18:00 PM PDT session 0x13220b93e610552 cxid 0x0 zxid 0x601bd373e > createSession 6000 > 9/22/11 12:18:01 PM PDT session 0x13220b93e610552 cxid 0x6c zxid 0x601bd37a0 > closeSession null > 9/22/11 12:18:02 PM PDT session 0x13220b93e610553 cxid 0x0 zxid 0x601bd37e9 > createSession 6000 > 9/22/11 12:18:03 PM PDT session 0x13220b93e610553 cxid 0x74 zxid 0x601bd382b > closeSession null > 9/22/11 12:18:04 PM PDT session 0x13220b93e610554 cxid 0x0 zxid 0x601bd383c > createSession 6000 > 9/22/11 12:18:05 PM PDT session 0x13220b93e610554 cxid 0x6a zxid 0x601bd388f > closeSession null > 9/22/11 12:18:06 PM PDT session 0x13220b93e610555 cxid 0x0 zxid 0x601bd3895 > createSession 6000 > 9/22/11 12:18:07 PM PDT session 0x13220b93e610555 cxid 0x6a zxid 0x601bd38cd > closeSession null > 9/22/11 12:18:10 PM PDT session 0x13220b93e610556 cxid 0x0 zxid 0x601bd38d1 > createSession 6000 > 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x0 zxid 0x601bd38f2 > createSession 6000 > 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x51 zxid 0x601bd396a > closeSession null > Here is the log output for the sessions that tried creating the same node > 9/22/11 12:17:54 PM PDT session 0x13220b93e61054f cxid 0x42 zxid 0x601bd366b > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:17:56 PM PDT session 0x13220b93e610550 cxid 0x42 zxid 0x601bd36ce > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:17:58 PM PDT session 0x13220b93e610551 cxid 0x42 zxid 0x601bd3711 > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:18:00 PM PDT session 0x13220b93e610552 cxid 0x42 zxid 0x601bd3777 > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:18:02 PM PDT session 0x13220b93e610553 cxid 0x42 zxid 0x601bd3802 > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:18:05 PM PDT session 0x13220b93e610554 cxid 0x44 zxid 0x601bd385d > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:18:07 PM PDT session 0x13220b93e610555 cxid 0x44 zxid 0x601bd38b0 > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x52 zxid 0x601bd396b > create > '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7 > Let me know if you need additional information. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira