[jira] [Created] (AMBARI-16448) Ambari show namenode is stop but actually namenode is still working

["Chen Yi-Ling (JIRA)" <ji...@apache.org>]

Chen Yi-Ling created AMBARI-16448:
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             Summary: Ambari show namenode is stop but actually namenode is still working
                 Key: AMBARI-16448
                 URL: https://issues.apache.org/jira/browse/AMBARI-16448
             Project: Ambari
          Issue Type: Bug
    Affects Versions: 2.1.2
         Environment: ubuntu 14.04
            Reporter: Chen Yi-Ling


After finish setup, every node status is correct. But someday ambari suddenly show namdenode is stopped.(we don't change any config of ambari or namenode) However, we still can use HBASE and run MapReduce. we think name node status should be normal.

We try to restart namenode and check ambari-server log It shows:
ServiceComponentHostImpl:949 - Host role transitioned to a new state, serviceComponentName=NAMENODE, oldState=STARTING, currentState=STARTED HeartBeatHandler:657 - State of service component NAMENODE of service HDFS of cluster wae has changed from STARTED to INSTALLED

we don't understand why its status change from "STARTED" to "INSTALLED"



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