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How to Address "hdfs namenode -format" Being Run Accidentally on the Active NameNode of a Healthy Cluster (Doc ID 2353876.1)

Last updated on JANUARY 21, 2020

Applies to:

Big Data Appliance Integrated Software - Version 4.5.0 and later
Linux x86-64


On a healthy system the following command was accidently run on the Active NameNode host:

The goal of this note is how to verify that no damage was done to the system from that command.



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In this Document
 Specific Background on "hdfs namenode -format"
 General Background on "Formatting the Namenode"
 Actions to Confirm Cluster Health

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