We are getting "NameNode High Availability Health"alert frequently from ambari notifications .
Here ,we have observed Standby or Active nodes frequently going to Unknown stage and coming back immidiately .
Standby, Unknown['xxxxxx"50070'] .
There are log records are captured related to this in ambari-alerts.log .
What will be the reason to change Active/Standby to Unknown . ?
What will be the solution for this . Thanks in Advance .