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https://issues.apache.org/jira/browse/YARN-5611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582078#comment-15582078
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Rohith Sharma K S commented on YARN-5611:
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bq. The appIdToTimeoutTypeMapping may be not needed.
I added this for couple of reasons.
# Caching, need not to create RMAppToMonitor object on every update or on
getRemainingTime or any other.
# Since, YARN may support more timeout for an application, it would help to
track what all are the timeouts for an application has been registered. Say
app1 might want only lifetime, app2 might want lifetime & queue_time. In such
cases, it is easier to look up this mapping and get registered timeouts for an
application.
bq. Also, when we update the timeout, the new timeout should be current
timestamp + newTimeout value. Later, we will also send the remaining lifetime
to user if user queries, this way, it's easier to reason - what user sets as
the timeout value is what user will get when he queries.
Good point. let me change it. Note: as of now, we are not storing timeout
values in statestore apart from submissionContext. Submission context will
contains only timeout which is not absolute. But, currently we are supporting
only lifetime, then we can recover on RM restart. So, in future if any such use
case for supporting different timeouts then for RM HA cases, we need to recover
either monitoringStartTime or EndTime.
> Provide an API to update lifetime of an application.
> ----------------------------------------------------
>
> Key: YARN-5611
> URL: https://issues.apache.org/jira/browse/YARN-5611
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
> Attachments: 0001-YARN-5611.patch, 0002-YARN-5611.patch,
> YARN-5611.v0.patch
>
>
> YARN-4205 monitors an Lifetime of an applications is monitored if required.
> Add an client api to update lifetime of an application.
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