hadoop-yarn-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Juan Rodríguez Hortalá (JIRA) <j...@apache.org>
Subject [jira] [Created] (YARN-6483) Add nodes transitioning to DECOMMISSIONING state to the list of updated nodes returned by the Resource Manager as a response to the Application Master heartbeat
Date Fri, 14 Apr 2017 17:36:41 GMT
Juan Rodríguez Hortalá created YARN-6483:
--------------------------------------------

             Summary: Add nodes transitioning to DECOMMISSIONING state to the list of updated
nodes returned by the Resource Manager as a response to the Application Master heartbeat
                 Key: YARN-6483
                 URL: https://issues.apache.org/jira/browse/YARN-6483
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
    Affects Versions: 2.7.3
            Reporter: Juan Rodríguez Hortalá


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
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-dev-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-dev-help@hadoop.apache.org


Mime
View raw message