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  1. Hadoop HDFS
  2. HDFS-6706

ZKFailoverController failed to recognize the quorum is not met

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Invalid
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
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      Description

      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 set the ha.zookeeper.quorum to 3.
      2. start two zookeeper servers.
      3. do "hdfs zkfc -format", and then "hdfs zkfc"

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            • Assignee:
              brandonli Brandon Li
              Reporter:
              brandonli Brandon Li
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                Updated:
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