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Posted to issues@aurora.apache.org by "Bill Farner (JIRA)" <ji...@apache.org> on 2015/09/13 18:14:45 UTC

[jira] [Assigned] (AURORA-1459) DelayExecutor is flaky within scheduling loop

     [ https://issues.apache.org/jira/browse/AURORA-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bill Farner reassigned AURORA-1459:
-----------------------------------

    Assignee: Bill Farner

> DelayExecutor is flaky within scheduling loop
> ---------------------------------------------
>
>                 Key: AURORA-1459
>                 URL: https://issues.apache.org/jira/browse/AURORA-1459
>             Project: Aurora
>          Issue Type: Bug
>          Components: Scheduler
>            Reporter: Maxim Khutornenko
>            Assignee: Bill Farner
>
> TaskGroups now uses DelayExecutor introduced to gate async operations. The problem though is that DelayExecutor queue is only flushed on DB transaction completion (1). This means no scheduling can ever proceed unless there is _some_ storage mutation activity. If/when there are no storage writes scheduling effectively halts. 
> While it unlikely to happen in production, it is consistently reproducible with e2e tests in vagrant on any subsequent run.
> (1) - https://github.com/apache/aurora/blob/06ddaadbcba4c66b8019815de6ca27d50a9df77d/src/main/java/org/apache/aurora/scheduler/storage/db/DbStorage.java#L175-L178



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