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From "Kay Ousterhout (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-19755) Blacklist is always active for MesosCoarseGrainedSchedulerBackend. As result - scheduler cannot create an executor after some time.
Date Fri, 17 Mar 2017 23:51:41 GMT

     [ https://issues.apache.org/jira/browse/SPARK-19755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kay Ousterhout resolved SPARK-19755.
------------------------------------
    Resolution: Not A Problem

> Blacklist is always active for MesosCoarseGrainedSchedulerBackend. As result - scheduler
cannot create an executor after some time.
> -----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-19755
>                 URL: https://issues.apache.org/jira/browse/SPARK-19755
>             Project: Spark
>          Issue Type: Bug
>          Components: Mesos, Scheduler
>    Affects Versions: 2.1.0
>         Environment: mesos, marathon, docker - driver and executors are dockerized.
>            Reporter: Timur Abakumov
>
> When for some reason task fails - MesosCoarseGrainedSchedulerBackend increased failure
counter for a slave where that task was running.
> When counter is >=2 (MAX_SLAVE_FAILURES) mesos slave is excluded.  
> Over time  scheduler cannot create a new executor - every slave is is in the blacklist.
 Task failure not necessary related to host health- especially for long running stream apps.
> If accepted as a bug: possible solution is to use: spark.blacklist.enabled to make that
functionality optional and if it make sense   MAX_SLAVE_FAILURES also can be configurable.
 



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