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https://issues.apache.org/jira/browse/YARN-5566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Kanter updated YARN-5566:
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Attachment: YARN-5566.001.patch
When digging into this, I figured that the DECOMMISSIONG node must have thought
it was still running apps, and so I added a bunch of extra print statements and
saw that this was the case. While all RUNNING nodes had the correct counts,
the DECOMMISSIONING node's count went back up somehow. I was looking at the
state transitions, and saw that this one
{code:java}
.addTransition(NodeState.DECOMMISSIONING,
EnumSet.of(NodeState.DECOMMISSIONING, NodeState.DECOMMISSIONED),
RMNodeEventType.STATUS_UPDATE,
new StatusUpdateWhenHealthyTransition())
{code}
looked different from this analogue one
{code:java}
.addTransition(NodeState.RUNNING,
EnumSet.of(NodeState.RUNNING, NodeState.UNHEALTHY),
RMNodeEventType.STATUS_UPDATE,
new StatusUpdateWhenHealthyTransition())
{code}
despite calling the same transition. So I tried adding the UNHEALTHY state,
and that fixed the problem.
[~djp] any ideas what's going on here?
> client-side NM graceful decom doesn't trigger when jobs finish
> --------------------------------------------------------------
>
> Key: YARN-5566
> URL: https://issues.apache.org/jira/browse/YARN-5566
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Affects Versions: 2.8.0
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Attachments: YARN-5566.001.patch
>
>
> I was testing the client-side NM graceful decommission and noticed that it
> was always waiting for the timeout, even if all jobs running on that node (or
> even the cluster) had already finished.
> For example:
> # JobA is running with at least one container on NodeA
> # User runs client-side decom on NodeA at 5:00am with a timeout of 3 hours
> --> NodeA enters DECOMMISSIONING state
> # JobA finishes at 6:00am and there are no other jobs running on NodeA
> # User's client reaches the timeout at 8:00am, and forcibly decommissions
> NodeA
> NodeA should have decommissioned at 6:00am.
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