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https://issues.apache.org/jira/browse/MESOS-1807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14644867#comment-14644867
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Erik Weathers edited comment on MESOS-1807 at 7/28/15 8:27 PM:
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[~vi...@twitter.com]: without the web UI fix then to me its unacceptable to
*use* fractional CPUs at all. So for storm-on-mesos I'm using "0" as the
executor CPUs (because the mesos-supervisor does almost nothing, 0 is not
entirely unreasonable). When the behavior change requested in this ticket is
enacted (changing from warning to error) then I will either be stuck on the
previous version of mesos, or I will be forced to have an ugly UI. My
colleague found a couple of bugs that are related to this issue I'm mentioning:
* MESOS-2635
* MESOS-1867
was (Author: erikdw):
[~vi...@twitter.com]: without the web UI fix then to me its unacceptable to
*use* fractional CPUs at all. So for storm-on-mesos I'm using "0" as the
executor CPUs (because the mesos-supervisor does almost nothing, 0 is not
entirely unreasonable). When the behavior change requested in this ticket is
enacted (changing from warning to error) then I will either be stuck on the
previous version of mesos, or I will be forced to have an ugly UI.
> Disallow executors with cpu only or memory only resources
> ---------------------------------------------------------
>
> Key: MESOS-1807
> URL: https://issues.apache.org/jira/browse/MESOS-1807
> Project: Mesos
> Issue Type: Improvement
> Reporter: Vinod Kone
> Labels: newbie
> Attachments: Screenshot 2015-07-28 14.40.35.png
>
>
> Currently master allows executors to be launched with either only cpus or
> only memory but we shouldn't allow that.
> This is because executor is an actual unix process that is launched by the
> slave. If an executor doesn't specify cpus, what should do the cpu limits be
> for that executor when there are no tasks running on it? If no cpu limits are
> set then it might starve other executors/tasks on the slave violating
> isolation guarantees. Same goes with memory. Moreover, the current
> containerizer/isolator code will throw failures when using such an executor,
> e.g., when the last task on the executor finishes and Containerizer::update()
> is called with 0 cpus or 0 mem.
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