Brandon Li created HDFS-6706:
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Summary: ZKFailoverController failed to recognize the quorum is
not met
Key: HDFS-6706
URL: https://issues.apache.org/jira/browse/HDFS-6706
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Brandon Li
Assignee: Brandon Li
Thanks Kenny Zhang for finding this problem.
The zkfc cannot be startup due to ha.zookeeper.quorum is not met. "zkfc
-format" doesn't log the real problem. And then user will see the error message
instead of the real issue when starting zkfc.
2014-07-01 17:08:17,528 FATAL ha.ZKFailoverController
(ZKFailoverController.java:doRun(213)) - Unable to start failover controller.
Parent znode does not exist.
Run with -formatZK flag to initialize ZooKeeper.
2014-07-01 16:00:48,678 FATAL ha.ZKFailoverController
(ZKFailoverController.java:fatalError(365)) - Fatal error occurred:Received
create error from Zookeeper. code:NONODE for path
/hadoop-ha/prodcluster/ActiveStandbyElectorLock
2014-07-01 17:24:44,202 - INFO ProcessThread(sid:2
cport:-1)::PrepRequestProcessor@627 - Got user-level KeeperException when
processing sessionid:0x346f36191250005 type:create cxid:0x2 zxid:0xf00000033
txntype:-1 reqpath:n/a Error
Path:/hadoop-ha/prodcluster/ActiveStandbyElectorLock Error:KeeperErrorCode =
NodeExists for /hadoop-ha/prodcluster/ActiveStandbyElectorLock
To reproduce the problem:
1. use HDFS cluster with automatic HA enable and setup the ha.zookeeper.quorum
to 3.
2. start two zookeeper servers.
3. do "hdfs zkfc -format", and then "hdfs zkfc"
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