[jira] [Created] (DRILL-4836) ZK Issue during Drillbit startup, possibly due to race condition

["Abhishek Girish (JIRA)" <ji...@apache.org>]

Abhishek Girish created DRILL-4836:
--------------------------------------

             Summary: ZK Issue during Drillbit startup, possibly due to race condition
                 Key: DRILL-4836
                 URL: https://issues.apache.org/jira/browse/DRILL-4836
             Project: Apache Drill
          Issue Type: Bug
          Components:  Server
            Reporter: Abhishek Girish
            Assignee: Paul Rogers
             Fix For: 1.8.0


During a parallel launch of Drillbits on a 4 node cluster, I hit this issue during startup:

{code}
Exception in thread "main" org.apache.drill.exec.exception.DrillbitStartupException: Failure during initial startup of Drillbit.
        at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:284)
        at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:261)
        at org.apache.drill.exec.server.Drillbit.main(Drillbit.java:257)
Caused by: org.apache.drill.common.exceptions.DrillRuntimeException: unable to put
        at org.apache.drill.exec.coord.zk.ZookeeperClient.put(ZookeeperClient.java:196)
        at org.apache.drill.exec.store.sys.store.ZookeeperPersistentStore.putIfAbsent(ZookeeperPersistentStore.java:94)
        ...
        at org.apache.drill.exec.server.Drillbit.run(Drillbit.java:113)
        at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:281)
        ... 2 more
Caused by: org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for /drill/sys.storage_plugins/dfs
        at org.apache.drill.exec.coord.zk.ZookeeperClient.put(ZookeeperClient.java:191)
        ... 7 more
{code}

And similarly,
{code}
Caused by: org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for /drill/sys.storage_plugins/kudu
{code}



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