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https://issues.apache.org/jira/browse/YARN-9222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Hung updated YARN-9222:
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Summary: Print launchTime in ApplicationSummary (was: Change startTime
semantics for RMApp)
> Print launchTime in ApplicationSummary
> --------------------------------------
>
> Key: YARN-9222
> URL: https://issues.apache.org/jira/browse/YARN-9222
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Jonathan Hung
> Priority: Major
>
> Currently submitTime for rmApp is based on when app is submitted to
> RMAppManager:
> {noformat}
> rmAppManager.submitApplication(submissionContext,
> System.currentTimeMillis(), user);{noformat}
> Then RMAppManager#createAndPopulateNewRMApp does some validation (queue
> routing, app priority, etc), then the RMAppImpl object is created, at which
> point the startTime is populated:
> {noformat}
> if (startTime <= 0) {
> this.startTime = this.systemClock.getTime();
> } else {
> this.startTime = startTime;
> }{noformat}
> In general it seems there shouldn't be much difference between submitTime and
> startTime. It makes more sense to change startTime to when the app actually
> started. One possible solution is to (re)populate startTime when application
> master registers with RM.
> One issue may be compatibility, especially if there are large scheduling
> delays.
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