[jira] [Commented] (NIFI-997) Kerberos tickets are not being renewed by Hadoop

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14964468#comment-14964468 ] 

ASF GitHub Bot commented on NIFI-997:
-------------------------------------

Github user trkurc commented on the pull request:

    https://github.com/apache/nifi/pull/97#issuecomment-149424193
  
    I've started digging into this. Testing is the major challenge


> Kerberos tickets are not being renewed by Hadoop
> ------------------------------------------------
>
>                 Key: NIFI-997
>                 URL: https://issues.apache.org/jira/browse/NIFI-997
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Ricky Saltzer
>            Assignee: Ricky Saltzer
>
> I've discovered after some time of having kerberos enabled processors, that the kerberos ticket is not being renewed as it should. This is strange because according to HADOOP-6656, this should be automatically taken care of with a utility thread. I examined the NiFi jstack and saw that the renewal thread was present, so I'm not sure what's going on.
> Does NiFi do something with the processor threads that cause child threads to suspend? I have a patch that I'm currently testing (currently looking good), that will renew the kerberos ticket on getFileSystem() if a threshold is reached (e.g. 4 hours). 



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