Encountered exception loading fsimage, NameNode is not formatted

[#1]

NameNode is crashed when trying to restart it via CM due to: 

INFO Lock on /data/disk1/dfs/nn/in_use.lock acquired by nodename 26396@ip-10-2-0-224.ec2.internal

Warning Encountered exception loading fsimage
java.io.IOException: NameNode is not formatted.
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:251)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1166)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:757)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:642)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:713)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:956)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:931)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1666)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1733)

Failed to start namenode.
java.io.IOException: NameNode is not formatted.
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:251)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1166)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:757)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:642)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:713)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:956)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:931)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1666)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1733)

 And when i try to sudo -u hdfs hdfs namenode -format on the nn i get this error:

23/11/30 12:21:35 ERROR namenode.NameNode: Failed to start namenode.
java.io.IOException: Running in secure mode, but config doesn't have a keytab
at org.apache.hadoop.security.SecurityUtil.login(SecurityUtil.java:306)
at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1136)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1623)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1733)
23/11/30 12:21:35 INFO util.ExitUtil: Exiting with status 1: java.io.IOException: Running in secure mode, but config doesn't have a keytab
23/11/30 12:21:35 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at ip-10-2-0-224.ec2.internal/10.2.0.224

 Please help me get the HDFS NN running

[#2]

Hi ,
That's you Standby Namenode (SBNN). Please verify if it's performing
checkpoint ing or not. Please perform one checkpoint from Cloudera manager
to get the health test clear.