Brahma Reddy Battula created HDFS-7739:
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             Summary: ZKFC - transitionToActive is indefinitely waiting to 
complete fenceOldActive
                 Key: HDFS-7739
                 URL: https://issues.apache.org/jira/browse/HDFS-7739
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: auto-failover
    Affects Versions: 2.6.0
            Reporter: Brahma Reddy Battula
            Assignee: Brahma Reddy Battula
            Priority: Critical


 *Scenario:* 

One of the cluster disk got full and ZKFC making tranisionToAcitve ,To fence 
old active node it needs to execute the command and wait for tge result, since 
disk got full, strempumper thread will be indefinitely waiting( Even after free 
the disk also, it will not come out)...

Please check the attached thread dump for ZKFC..

Better to maintain the timeout for stream-pumper thread..

{code}
protected void pump() throws IOException {
    InputStreamReader inputStreamReader = new InputStreamReader(stream);
    BufferedReader br = new BufferedReader(inputStreamReader);
    String line = null;
    while ((line = br.readLine()) != null) {
      if (type == StreamType.STDOUT) {
        log.info(logPrefix + ": " + line);
      } else {
        log.warn(logPrefix + ": " + line);          
      }
{code}




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