We are using HDP 2.7.1.2.3 with Ambari 2.1.2
After finish setup, every node status is correct. But oneday 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". In namenode side, we check ambari-agent.log It shows one warning:
[Alert][namenode_directory_status] HA nameservice value is present but there are no aliases for {{hdfs-site/dfs.ha.namenodes.{{ha-nameservice}}}}
We think it is irrelevant.
What's the reason that ambari think namenode is stopped? Is there any way that we can fix this issue?
