You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@zookeeper.apache.org by "Rakesh R (JIRA)" <ji...@apache.org> on 2012/09/17 09:17:07 UTC
[jira] [Updated] (ZOOKEEPER-1496) Ephemeral node not getting
cleared even after client has exited
[ https://issues.apache.org/jira/browse/ZOOKEEPER-1496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rakesh R updated ZOOKEEPER-1496:
--------------------------------
Attachment: ZOOKEEPER-1496.3.patch
> Ephemeral node not getting cleared even after client has exited
> ---------------------------------------------------------------
>
> Key: ZOOKEEPER-1496
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1496
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.4.3
> Reporter: suja s
> Assignee: Rakesh R
> Priority: Critical
> Fix For: 3.4.4, 3.5.0
>
> Attachments: Logs.rar, ZOOKEEPER-1496.1.patch, ZOOKEEPER-1496.2.patch, ZOOKEEPER-1496.3.patch, ZOOKEEPER-1496.patch
>
>
> In one of the tests we performed, came across a case where the ephemeral node was not getting cleared from zookeeper though the client exited.
> Zk version: 3.4.3
> Ephemeral node still exists in Zookeeper:
> HOST-xx-xx-xx-55:/home/Jun25_LR/install/zookeeper/bin # date
> Tue Jun 26 16:07:04 IST 2012
> HOST-xx-xx-xx-55:/home/Jun25_LR/install/zookeeper/bin # ./zkCli.sh -server xx.xx.xx.55:2182
> Connecting to xx.xx.xx.55:2182
> Welcome to ZooKeeper!
> JLine support is enabled
> [zk: xx.xx.xx.55:2182(CONNECTING) 0]
> WATCHER::
> WatchedEvent state:SyncConnected type:None path:null
> [zk: xx.xx.xx.55:2182(CONNECTED) 0] get /hadoop-ha/hacluster/ActiveStandbyElectorLock
> haclusternn2HOSt-xx-xx-xx-102 ��
> cZxid = 0x200000075
> ctime = Tue Jun 26 13:10:19 IST 2012
> mZxid = 0x200000075
> mtime = Tue Jun 26 13:10:19 IST 2012
> pZxid = 0x200000075
> cversion = 0
> dataVersion = 0
> aclVersion = 0
> ephemeralOwner = 0x1382791d4e50004
> dataLength = 42
> numChildren = 0
> [zk: xx.xx.xx.55:2182(CONNECTED) 1]
> Grepped logs at ZK side for session "0x1382791d4e50004" - close session and later create coming before closesession processed.
> HOSt-xx-xx-xx-91:/home/Jun25_LR/install/zookeeper/logs # grep -E "/hadoop-ha/hacluster/ActiveStandbyElectorLock|0x1382791d4e50004" *|grep 0x200000074
> 2012-06-26 13:10:18,834 [myid:3] - DEBUG [ProcessThread(sid:3 cport:-1)::CommitProcessor@171] - Processing request:: sessionid:0x1382791d4e50004 type:closeSession cxid:0x0 zxid:0x200000074 txntype:-11 reqpath:n/a
> 2012-06-26 13:10:19,892 [myid:3] - DEBUG [ProcessThread(sid:3 cport:-1)::Leader@716] - Proposing:: sessionid:0x1382791d4e50004 type:closeSession cxid:0x0 zxid:0x200000074 txntype:-11 reqpath:n/a
> 2012-06-26 13:10:19,919 [myid:3] - DEBUG [LearnerHandler-/xx.xx.xx.102:13846:CommitProcessor@161] - Committing request:: sessionid:0x1382791d4e50004 type:closeSession cxid:0x0 zxid:0x200000074 txntype:-11 reqpath:n/a
> 2012-06-26 13:10:20,608 [myid:3] - DEBUG [CommitProcessor:3:FinalRequestProcessor@88] - Processing request:: sessionid:0x1382791d4e50004 type:closeSession cxid:0x0 zxid:0x200000074 txntype:-11 reqpath:n/a
> HOSt-xx-xx-xx-91:/home/Jun25_LR/install/zookeeper/logs # grep -E "/hadoop-ha/hacluster/ActiveStandbyElectorLock|0x1382791d4e50004" *|grep 0x200000075
> 2012-06-26 13:10:19,893 [myid:3] - DEBUG [ProcessThread(sid:3 cport:-1)::CommitProcessor@171] - Processing request:: sessionid:0x1382791d4e50004 type:create cxid:0x2 zxid:0x200000075 txntype:1 reqpath:n/a
> 2012-06-26 13:10:19,920 [myid:3] - DEBUG [ProcessThread(sid:3 cport:-1)::Leader@716] - Proposing:: sessionid:0x1382791d4e50004 type:create cxid:0x2 zxid:0x200000075 txntype:1 reqpath:n/a
> 2012-06-26 13:10:20,278 [myid:3] - DEBUG [LearnerHandler-/xx.xx.xx.102:13846:CommitProcessor@161] - Committing request:: sessionid:0x1382791d4e50004 type:create cxid:0x2 zxid:0x200000075 txntype:1 reqpath:n/a
> 2012-06-26 13:10:20,752 [myid:3] - DEBUG [CommitProcessor:3:FinalRequestProcessor@88] - Processing request:: sessionid:0x1382791d4e50004 type:create cxid:0x2 zxid:0x200000075 txntype:1 reqpath:n/a
> Close session and create requests coming almost parallely.
> Env:
> Hadoop setup.
> We were using Namenode HA with bookkeeper as shared storage and auto failover enabled.
> NN102 was active and NN55 was standby.
> FailoverController at 102 got shut down due to ZK connection error.
> The lock-ActiveStandbyElectorLock created (ephemeral node) by this failovercontroller is not cleared from ZK
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira