I have seen a situation wher some of the jobs suddenly failed with error saying "Cannot create a file. Namenode in safe mode." When I check the cloudera manager, HDFS_CANARY_HEALTH check failed. I also observed that the Active namenode become standaby and standby become active. So, if the HDFS_CANARY_HEALTH test fails then Namenode restarts by itself? Can anyone respond to this. ... View more