Arvind Narain created TRAFODION-1897:
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Summary: 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
Reported by Joshua Liu
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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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