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From "Benjamin Mahler (JIRA)" <>
Subject [jira] [Commented] (MESOS-265) Master hogs CPU
Date Thu, 30 Aug 2012 00:35:07 GMT


Benjamin Mahler commented on MESOS-265:

Hi James, which version of mesos are you running?
> Master hogs CPU
> ---------------
>                 Key: MESOS-265
>                 URL:
>             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
> 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
> Screenshot: (there are no active jobs,
but lt-mesos-master is using 75% CPU)

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