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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7857) -fstack-check compilation flag causes binary incompatibility for container-executor between RHEL 6 and RHEL 7
Date Mon, 05 Feb 2018 19:43:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16352824#comment-16352824
] 

Miklos Szegedi commented on YARN-7857:
--------------------------------------

[~Jim_Brennan], I agree let's postpone removing the guard. The RH7 code checks much less.
It seems like it checks only the pages that it needs, so probably that is why it is not crashing
like the RH6 code. However, I am interested why the kernel traps the expansion of the stack
despite of the fact that we are within the actual limit of the stack.

> -fstack-check compilation flag causes binary incompatibility for container-executor between
RHEL 6 and RHEL 7
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-7857
>                 URL: https://issues.apache.org/jira/browse/YARN-7857
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 3.0.0
>            Reporter: Jim Brennan
>            Assignee: Jim Brennan
>            Priority: Major
>         Attachments: YARN-7857.001.patch
>
>
> The segmentation fault in container-executor reported in [YARN-7796]  appears to be due
to a binary compatibility issue with the {{-fstack-check}} flag that was added in [YARN-6721]
> Based on my testing, a container-executor (without the patch from [YARN-7796]) compiled
on RHEL 6 with the -fstack-check flag always hits this segmentation fault when run on RHEL
7.  But if you compile without this flag, the container-executor runs on RHEL 7 with no problems.
 I also verified this with a simple program that just does the copy_file.
> I think we need to either remove this flag, or find a suitable alternative.



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