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https://issues.apache.org/jira/browse/TRAFODION-1897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15319457#comment-15319457
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ASF GitHub Bot commented on TRAFODION-1897:
-------------------------------------------
Github user arvind-narain closed the pull request at:
https://github.com/apache/incubator-trafodion/pull/389
> dcscheck may fail if one of the nodes in zookeeper quorum is down
> -----------------------------------------------------------------
>
> Key: TRAFODION-1897
> URL: https://issues.apache.org/jira/browse/TRAFODION-1897
> Project: Apache Trafodion
> Issue Type: Bug
> Components: connectivity-dcs
> Affects Versions: any
> Reporter: Arvind Narain
> Assignee: Arvind Narain
>
> Reported by Joshua Liu - thanks for finding this defect
> ===========================================
> These days during HA testing, when one zookeeper node is down, then
> dcscheck may also gave one error like:
> Exception in thread "main"
> org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode
> = ConnectionLoss for /trafodion/dcs/master
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1468)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1496)
> at
> org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:725)
> at
> org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:593)
> at
> org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:365)
> at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:323)
> at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:282)
> my env:
> 1. Trafodion nodes centosha-[3-6]
> 2. Zookeeper nodes is centosha-2, centosha-5, centosha-6
> 3. If I down node centosha-6, then dcscheck would give the error. But if I
> down centosha-5, then we can’t see the error
> After check the codes, we found
> echo "ls $dcsznode"|$DCS_INSTALL_DIR/bin/dcs zkcli > $dcstmp
> every time when I manually ran dcs zkcli, it tried to connect to the
> zookeeper on node centosha-6. Even this node is down, the ‘dcs zkcli’ also
> try to connect this node:
> [trafodion@centosha-3 bin]$ dcs zkcli
> Connecting to centosha-6.novalocal:2181
> Welcome to ZooKeeper!
> JLine support is enabled
> [zk: centosha-6.novalocal:2181(CONNECTING) 0] ls /
> Exception in thread "main"
> org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode
> = ConnectionLoss for /
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1468)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1496)
> at
> org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:725)
> at
> org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:593)
> at
> org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:365)
> at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:323)
> at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:282)
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