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After Node 3 Migration Both Resource Managers in Standby because yarn-site.xml on the Non-Migrated Resource Manager Incorrectly References Node 3 (Doc ID 2525921.1)

Last updated on JULY 20, 2024

Applies to:

Big Data Appliance Integrated Software - Version 4.11.0 and later
Linux x86-64

Symptoms

In the example here Node 3 is migrated to Node 5.

By default the BDA has ResourceManager(RM) roles on Node 3 and Node 4.

In the case here after migrating Node 3 to another host, for example, Node 5, the Resource Manager yarn-site.xml file on the non-migrated Resource Manager, e.g. Node 4, incorrectly retains references to Node 3.

Because the yarn-site.xml on the non-migrated Resource Manager e.g. Node 4, references Node 3 and not the node with migrated roles, e.g. Node 5:

  1. Both Resource Managers are in Standby.
  2. Zookeeper will not start on all hosts.

This can be seen on the yarn-site.xml on Node 4 as below.


1. On Node 4 navigate to the most recent yarn-RESOURCEMANAGER directory under /var/run/cloudera-scm-agent/process.

For example: 

  

In both examples above the reference to <HOSTNAME3> should be the migrated host <HOSTNAME5>.

 

Cause

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In this Document
Symptoms
Cause
Solution


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