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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 Fri, 02 Feb 2018 18:36:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16350781#comment-16350781
] 

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

Thank you, [~Jim_Brennan] for the patch. I am a little bit concerned that we sacrifice security
over compatibility. Since RHEL7 code does not run on RHEL6 anyways for glibc compatibility
issues, would it make sense to keep the stack check code for RHEL7 and above? I checked the
RHEL74 stack guard code and it seems to be much more precise than the one in the previous
version.

> -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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