[jira] [Created] (AMBARI-15645) Upgrading Kerberized JournalNode requires HDFS principal to perform 'role edits' task

["Robert Levas (JIRA)" <ji...@apache.org>]

Robert Levas created AMBARI-15645:
-------------------------------------

             Summary: Upgrading Kerberized JournalNode requires HDFS principal to perform 'role edits' task
                 Key: AMBARI-15645
                 URL: https://issues.apache.org/jira/browse/AMBARI-15645
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 2.1.2
            Reporter: Robert Levas
            Assignee: Robert Levas
             Fix For: 2.2.2


After upgrading HDP in Ambari version 2.1.2.1 a task a performed to _role edits_ while restarting JournalNodes. If Kerberos is enabled, the JN Kerberos identity is established before making this call when really the HDFS identity should be established - since this is an administrative HDFS call that requires the HDFS administrator user to perform.

Because of this, the following error is generated and seen in the :
{noformat}
Fail: Execution of 'hdfs dfsadmin -rollEdits' returned 255. rollEdits: Access denied for user jn. Superuser privilege is required
{noformat}

The offending code is
{code:title=common-services/HDFS/2.1.0.2.0/package/scripts/journalnode_upgrade.py}
  if params.security_enabled:
    Execute(params.jn_kinit_cmd, user=params.hdfs_user)

  time.sleep(5)
  hdfs_roll_edits()
  time.sleep(5)
{code}

It should probably be something like:

{code:title=common-services/HDFS/2.1.0.2.0/package/scripts/journalnode_upgrade.py}
  if params.security_enabled:
    Execute(params.hdfs_kinit_cmd, user=params.hdfs_user)

  time.sleep(5)
  hdfs_roll_edits()
  time.sleep(5)
{code}

*Note the change from jn to hdfs in the kinit command line.*

This issue has also been posted in https://issues.apache.org/jira/browse/AMBARI-10519.



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