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From "Daniel Zhi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-4676) Automatic and Asynchronous Decommissioning Nodes Status Tracking
Date Thu, 04 Aug 2016 22:39:20 GMT

     [ https://issues.apache.org/jira/browse/YARN-4676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Zhi updated YARN-4676:
-----------------------------
    Attachment: YARN-4676.020.patch

YARN-4676.020.patch removed DECOMMISSIONED->RUNNING transition with simpler than I expected
changes and will work regardless whether NM auto-restart.
 1. NodesListManager no longer submit RECOMMISSION event for DECOMMISSIONED node (that is
no longer excluded)
 2. ensure nmLivelinessMonitor.unregister(nodeId) to avoid otherwise the EXPIRE event on DECOMMISSIONED
node (which would require such transition)
The other two transitions are for derived cases and are removed as well.

> Automatic and Asynchronous Decommissioning Nodes Status Tracking
> ----------------------------------------------------------------
>
>                 Key: YARN-4676
>                 URL: https://issues.apache.org/jira/browse/YARN-4676
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.8.0
>            Reporter: Daniel Zhi
>            Assignee: Daniel Zhi
>              Labels: features
>         Attachments: GracefulDecommissionYarnNode.pdf, GracefulDecommissionYarnNode.pdf,
YARN-4676.004.patch, YARN-4676.005.patch, YARN-4676.006.patch, YARN-4676.007.patch, YARN-4676.008.patch,
YARN-4676.009.patch, YARN-4676.010.patch, YARN-4676.011.patch, YARN-4676.012.patch, YARN-4676.013.patch,
YARN-4676.014.patch, YARN-4676.015.patch, YARN-4676.016.patch, YARN-4676.017.patch, YARN-4676.018.patch,
YARN-4676.019.patch, YARN-4676.020.patch
>
>
> YARN-4676 implements an automatic, asynchronous and flexible mechanism to graceful decommission
> YARN nodes. After user issues the refreshNodes request, ResourceManager automatically
evaluates
> status of all affected nodes to kicks out decommission or recommission actions. RM asynchronously
> tracks container and application status related to DECOMMISSIONING nodes to decommission
the
> nodes immediately after there are ready to be decommissioned. Decommissioning timeout
at individual
> nodes granularity is supported and could be dynamically updated. The mechanism naturally
supports multiple
> independent graceful decommissioning “sessions” where each one involves different
sets of nodes with
> different timeout settings. Such support is ideal and necessary for graceful decommission
request issued
> by external cluster management software instead of human.
> DecommissioningNodeWatcher inside ResourceTrackingService tracks DECOMMISSIONING nodes
status automatically and asynchronously after client/admin made the graceful decommission
request. It tracks DECOMMISSIONING nodes status to decide when, after all running containers
on the node have completed, will be transitioned into DECOMMISSIONED state. NodesListManager
detect and handle include and exclude list changes to kick out decommission or recommission
as necessary.



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