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  1. Hadoop YARN
  2. YARN-3152

Missing hadoop exclude file fails RMs in HA



    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.6.0
    • Fix Version/s: None
    • Component/s: resourcemanager
    • Labels:
    • Environment:

      Debian 7


      NI have two NNs in HA, they do not fail when the exclude file is not present (hadoop-2.6.0/etc/hadoop/exclude). I had one RM and I wanted to make two in HA. I didn't create the exclude file at this point as well. I applied the HA RM settings properly and when I started both RMs I started getting this exception:

      2015-02-06 12:25:25,326 WARN org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=root OPERATION=transitionToActive TARGET=RMHAProtocolService RESULT=FAILURE DESCRIPTION=Exception transitioning to active PERMISSIONS=All users are allowed
      2015-02-06 12:25:25,326 WARN org.apache.hadoop.ha.ActiveStandbyElector: Exception handling the winning of election
      org.apache.hadoop.ha.ServiceFailedException: RM could not transition to Active
      at org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:128)
      at org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:805)
      at org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:416)
      at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599)
      at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
      Caused by: org.apache.hadoop.ha.ServiceFailedException: Error when transitioning to Active mode
      at org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:304)
      at org.apache.hadoop.yarn.server.resourcemanager.EmbeddedElectorService.becomeActive(EmbeddedElectorService.java:126)
      ... 4 more
      Caused by: org.apache.hadoop.ha.ServiceFailedException: java.io.FileNotFoundException: /hadoop-2.6.0/etc/hadoop/exclude (No such file or directory)
      at org.apache.hadoop.yarn.server.resourcemanager.AdminService.refreshAll(AdminService.java:626)
      at org.apache.hadoop.yarn.server.resourcemanager.AdminService.transitionToActive(AdminService.java:297)
      ... 5 more
      2015-02-06 12:25:25,327 INFO org.apache.hadoop.ha.ActiveStandbyElector: Trying to re-establish ZK session
      2015-02-06 12:25:25,339 INFO org.apache.zookeeper.ZooKeeper: Session: 0x44af32566180094 closed
      2015-02-06 12:25:26,340 INFO org.apache.zookeeper.ZooKeeper: Initiating client connection, connectString=x.x.x.x:2181,x.x.x.x:2181 sessionTimeout=10000 watcher=org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef@307587c
      2015-02-06 12:25:26,341 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server x.x.x.x/x.x.x.x:2181. Will not attempt to authenticate using SASL (unknown error)
      2015-02-06 12:25:26,341 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to x.x.x.x/x.x.x.x:2181, initiating session

      The issue is descriptive enough to resolve the problem - and it has been fixed by creating the exclude file.

      I just think as of a improvement:

      • Should RMs ignore the missing file as the NNs did?
      • Should single RM fail even when the file is not present?

      Just suggesting this improvement to keep the behavior consistent when working with in HA (both NNs and RMs).


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              • Assignee:
                Naganarasimha Naganarasimha G R
                neillfontes Neill Lima
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