Name Node Restart in a Specific day

[#1]

Hi Expert ,

Is there a page in Ambari to find out how many times namenode was restarted on a specific day ?

Or we can check this from specific logs ? 

Thanks in advance 

[#2]

I suggest to go through the NameNode logs and ZKFailoverController logs

• In the restarted NameNode log, search SHUTDOWN_MSG and STARTUP_MSG you will know the NN stop/start point. And you may want to go through the logs before SHUTDOWN_MSG to figure out what causes NN to shutdown.
• If HA is enabled, check both zk failover controller log which co-located in same hosts with NN:

ZKFC1:

2021-08-01 01:56:22,924 INFO ha.ZKFailoverController (ZKFailoverController.java:becomeStandby(494)) - Successfully transitioned NameNode at hostname/ip:8020:8020 to standby state

ZKFC2:

2021-08-01 01:56:07,105 INFO ha.ZKFailoverController (ZKFailoverController.java:becomeActive(392)) - Successfully transitioned NameNode at hostname/ip:8020 to active state