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From "Benjamin Mahler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-3552) Check failed: result.cpus() == cpus() && result.mem() == mem() && result.disk() == disk() && result.ports() == ports()
Date Tue, 29 Sep 2015 21:21:06 GMT

    [ https://issues.apache.org/jira/browse/MESOS-3552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14935885#comment-14935885
] 

Benjamin Mahler commented on MESOS-3552:
----------------------------------------

Could you please include a pointer to the code containing the check?

> Check failed: result.cpus() == cpus() && result.mem() == mem() && result.disk()
== disk() && result.ports() == ports() 
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: MESOS-3552
>                 URL: https://issues.apache.org/jira/browse/MESOS-3552
>             Project: Mesos
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.24.1
>            Reporter: Mandeep Chadha
>            Assignee: Mandeep Chadha
>
> result.cpus() == cpus() check is failing due to ( double == double ) comparison problem.

> Root Cause : 
> Framework requested 0.1 cpu reservation for the first task. So far so good. Next Reserve
operation — lead to double operations resulting in following double values :
>  results.cpus() : 23.9999999999999964472863211995 cpus() : 24
> And the check ( result.cpus() == cpus() ) failed. 
>  The double arithmetic operations caused results.cpus() value to be :  23.9999999999999964472863211995
and hence ( 23.9999999999999964472863211995 == 24 ) failed.



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