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ASF GitHub Bot commented on YARN-6483: -------------------------------------- Github user juanrh commented on the issue: https://github.com/apache/hadoop/pull/289 Pushed in https://github.com/apache/hadoop/commit/b46ca7e73b8bac3fdbff0b13afe009308078acf2 > Add nodes transitioning to DECOMMISSIONING state to the list of updated nodes > returned to the AM > ------------------------------------------------------------------------------------------------ > > Key: YARN-6483 > URL: https://issues.apache.org/jira/browse/YARN-6483 > Project: Hadoop YARN > Issue Type: Improvement > Components: resourcemanager > Reporter: Juan Rodríguez Hortalá > Assignee: Juan Rodríguez Hortalá > Fix For: 3.1.0 > > Attachments: YARN-6483-v1.patch, YARN-6483.002.patch, > YARN-6483.003.patch > > > The DECOMMISSIONING node state is currently used as part of the graceful > decommissioning mechanism to give time for tasks to complete in a node that > is scheduled for decommission, and for reducer tasks to read the shuffle > blocks in that node. Also, YARN effectively blacklists nodes in > DECOMMISSIONING state by assigning them a capacity of 0, to prevent > additional containers to be launched in those nodes, so no more shuffle > blocks are written to the node. This blacklisting is not effective for > applications like Spark, because a Spark executor running in a YARN container > will keep receiving more tasks after the corresponding node has been > blacklisted at the YARN level. We would like to propose a modification of the > YARN heartbeat mechanism so nodes transitioning to DECOMMISSIONING are added > to the list of updated nodes returned by the Resource Manager as a response > to the Application Master heartbeat. This way a Spark application master > would be able to blacklist a DECOMMISSIONING at the Spark level. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org