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https://issues.apache.org/jira/browse/MESOS-312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498634#comment-13498634
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Matei Zaharia commented on MESOS-312:
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+1, this is very confusing.
> Mesos never makes offers with only cpus
> ---------------------------------------
>
> Key: MESOS-312
> URL: https://issues.apache.org/jira/browse/MESOS-312
> Project: Mesos
> Issue Type: Bug
> Components: master
> Reporter: Charles Reiss
> Priority: Minor
>
> If a framework already has an executor placed on a machine, it may be able to
> use an offer that contains no or almost no memory but includes cpus. The
> current allocator will never make such offers.
> This can lead to non-intuitive results: If one runs Spark against Mesos
> configuring Spark to use almost exactly the available-to-Mesos memory, Spark
> will start running but eventually stall.
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