[jira] [Closed] (MESOS-265) Master hogs CPU

["Benjamin Mahler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benjamin Mahler closed MESOS-265.
---------------------------------

    Resolution: Cannot Reproduce

Thanks for replying!

My best guess would be that the particular version of Spark on Mesos you were running was possibly causing a DOS against the Master.
Since this ticket is pretty old, I'll close this and we can debug this if others notice this issue. :)

> Master hogs CPU
> ---------------
>
>                 Key: MESOS-265
>                 URL: https://issues.apache.org/jira/browse/MESOS-265
>             Project: Mesos
>          Issue Type: Bug
>          Components: master
>         Environment: * Cluster of 6 CentOS machines; 24 cores / 256G RAM each.
> * Large data file (1b records, 100GB) retrieved via HDFS.
> * Simple jobs (eg. count records by key, where key takes 20 possible values) using Spark with local modifications.
>            Reporter: James Zhao
>         Attachments: mesos-log.txt.zip
>
>
> CPU usage of the master slowly grows until eventually it stops working.
> Upon launch, CPU usage is about 1%. After running just 1 job, it climbs to 20% (even after the job has stopped), and upon running more jobs, quickly grows to 50%. It then continues to grow at a slower rate until eventually it stops responding (after perhaps several hundred jobs).
> Screenshot: http://math.stanford.edu/~jyzhao/mesos-cpu.png (there are no active jobs, but lt-mesos-master is using 75% CPU)



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