[jira] [Created] (AMBARI-22349) Changing hostname causes ambari-agent start to fail

["Andrew Onischuk (JIRA)" <ji...@apache.org>]

Andrew Onischuk created AMBARI-22349:
----------------------------------------

             Summary: Changing hostname causes ambari-agent start to fail
                 Key: AMBARI-22349
                 URL: https://issues.apache.org/jira/browse/AMBARI-22349
             Project: Ambari
          Issue Type: Bug
            Reporter: Andrew Onischuk
            Assignee: Andrew Onischuk
             Fix For: 3.0.0



    [root@gc6401 ~]# ambari-agent  restart
    Restarting ambari-agent
    Verifying Python version compatibility...
    Using python  /usr/bin/python
    ambari-agent is not running. No PID found at /var/run/ambari-agent/ambari-agent.pid
    Verifying Python version compatibility...
    Using python  /usr/bin/python
    Checking for previously running Ambari Agent...
    Checking ambari-common dir...
    Starting ambari-agent
    /var/lib/ambari-agent/bin/ambari-agent: line 185: 10328 Killed                  nohup $PYTHON $AMBARI_AGENT_PY_SCRIPT "$@" > $OUTFILE 2>&1
    Verifying ambari-agent process status...
    ERROR: ambari-agent start failed. For more details, see /var/log/ambari-agent/ambari-agent.out:
    ====================
        self.topology_cache = ClusterTopologyCache(self.config.cluster_cache_dir, self.config)
      File "/usr/lib/python2.6/site-packages/ambari_agent/ClusterTopologyCache.py", line 50, in __init__
        super(ClusterTopologyCache, self).__init__(cluster_cache_dir)
      File "/usr/lib/python2.6/site-packages/ambari_agent/ClusterCache.py", line 72, in __init__
        self.rewrite_cache(cache_dict, self.hash)
      File "/usr/lib/python2.6/site-packages/ambari_agent/ClusterCache.py", line 98, in rewrite_cache
        self.on_cache_update()
      File "/usr/lib/python2.6/site-packages/ambari_agent/ClusterTopologyCache.py", line 75, in on_cache_update
        current_host_id = self.current_host_ids_to_cluster[cluster_id]
    KeyError: '2'
    ====================
    Agent out at: /var/log/ambari-agent/ambari-agent.out
    Agent log at: /var/log/ambari-agent/ambari-agent.log
    

This happens because topology contains invalid hostname and cannot be loaded
correctly.





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