[jira] [Commented] (MESOS-8038) Launching GPU task sporadically fails.

["Zhitao Li (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-8038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518573#comment-16518573 ] 

Zhitao Li commented on MESOS-8038:
----------------------------------

We have this happening again in our cluster.

One suggestion I have is to change[ this Failure|https://github.com/apache/mesos/blob/72752fc6deb8ebcbfbd5448dc599ef3774339d31/src/slave/containerizer/mesos/isolators/gpu/allocator.cpp#L258] into a FATAL so that agent will generate a coredump when allowed, and we can use gdb to analyze the data structure further. This will also make recovery automated.

[~bmahler][~vinodkone] What do you think?

> Launching GPU task sporadically fails.
> --------------------------------------
>
>                 Key: MESOS-8038
>                 URL: https://issues.apache.org/jira/browse/MESOS-8038
>             Project: Mesos
>          Issue Type: Bug
>          Components: allocation, containerization, gpu
>    Affects Versions: 1.4.0
>            Reporter: Sai Teja Ranuva
>            Assignee: Zhitao Li
>            Priority: Critical
>         Attachments: mesos-master.log, mesos-slave.INFO.log
>
>
> I was running a job which uses GPUs. It runs fine most of the time. 
> But occasionally I see the following message in the mesos log.
> "Collect failed: Requested 1 but only 0 available"
> Followed by executor getting killed and the tasks getting lost. This happens even before the the job starts. A little search in the code base points me to something related to GPU resource being the probable cause.
> There is no deterministic way that this can be reproduced. It happens occasionally.
> I have attached the slave log for the issue.
> Using 1.4.0 Mesos Master and 1.4.0 Mesos Slave.



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