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NameNode Recovery from Catastrophic Failure Involving Both NameNodes on Oracle Big Data Appliance V2.3.1 and higher (Doc ID 1626806.1)

Last updated on MAY 30, 2021

Applies to:

Big Data Appliance Integrated Software - Version 2.3.1 and later
Linux x86-64


Detail the steps to perform NameNode recovery from a catastrophic failure involving both NameNodes.



 Oracle Big Data Appliance (BDA) Administrators.


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In this Document
 NameNode Recovery from Catastrophic Failure Involving Both NameNodes
 Overview of Steps for Catastrophic NameNode Recovery
 NameNode Log Files and Catastrophic Failure
 Preliminary Steps
 Backup Directories on NameNode where Recovery will Run
 NameNode Configuration Directory
 Navigator Required Updates to Current NameNode Configuration
 Perform Recovery
 Output If Missing Transaction IDs 
 Output If No Missing Transaction IDs
 Cleanup the 'current' Directory on the Recovered NameNode
 Start Recovered NameNode in Cloudera Manager
 Steps for the Second NameNode
 Starting up Second NameNode and Other Services in Cloudera Manager
 Steps for Manual Failover if Both NameNodes in Standby Mode
 Post Recovery Steps

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