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Posted to issues@ambari.apache.org by "D M Murali Krishna Reddy (Jira)" <ji...@apache.org> on 2023/06/13 18:40:00 UTC
[jira] [Commented] (AMBARI-25950) Exclude hosts getting erased when RM, NN are restarted
[ https://issues.apache.org/jira/browse/AMBARI-25950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17732212#comment-17732212 ]
D M Murali Krishna Reddy commented on AMBARI-25950:
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I have two working approaches
# Just before sending the ExecutionCommand to agents update CommandParams for all_decommisioned_hosts in AgentsCommandPublisher#populateExecutionCommandsClusters using the AmbariCustomCommandExecutionHelper#calculateDecommissionedNodes based on the executionCommand Role(RM or NN)
# Update CommandParams for all_decommisioned_hosts in a similar way as above
## For Custom Commands update CommandParams in AmbariCustomCommandExecutionHelper#addExecutionCommandsToStage, only for valid custom commands(except for service check and decommission commands)
## In AmbariManagementControllerImpl#createHostAction just before setting the commandParams for the executionCommand.
[~brahmareddy], [~vjasani] , [~vishalsuvagia] [~eub]
Can you suggest which approach to choose, I am inclined to approach 2 as the commandParams get added to stages.
> Exclude hosts getting erased when RM, NN are restarted
> ------------------------------------------------------
>
> Key: AMBARI-25950
> URL: https://issues.apache.org/jira/browse/AMBARI-25950
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Reporter: D M Murali Krishna Reddy
> Assignee: D M Murali Krishna Reddy
> Priority: Major
>
> After decommissioning a Node Manager or a Data node, if Resource Manager or Namenode are restarted, the exclude hosts file is getting overwritten with empty contents, causing the NM, DN to get recommisioned.
>
> During NN, RM restart all_decommissioned_hosts is not set due to which in params_linux.py the exclude hosts file is getting created with empty content.
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