https://community.cloudera.com/t5/Support-Questions/What-all-the-reasons-for-NameNode-Failure-in-Hadoop/m-p/306681#M222958 <P>That's way too general a question to provide a useful response.</P><P>&nbsp;</P><P>Give us some background like:</P><P>1.Overview of the cluster config including CDH/HDP version, if HA is enabled&nbsp;</P><P>2. Any recent changes</P><P>3. Errors/Exceptions in the NN log files</P><P>&nbsp;</P> Tue, 01 Dec 2020 19:03:19 GMT Mike in Austin 2020-12-01T19:03:19Z