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From leoncamel <...@git.apache.org>
Subject [GitHub] incubator-hawq pull request: HAWQ-233. Fix HAWQ initialization fai...
Date Wed, 09 Dec 2015 02:37:31 GMT
GitHub user leoncamel opened a pull request:

    https://github.com/apache/incubator-hawq/pull/170

    HAWQ-233. Fix HAWQ initialization failed on Centos7

    Hi,
    We have investigated this issue, and we found the root cause is that gcc-4.8 introduced
new feature "-faggressive-loop-optimizations". This optimization feature is enabled by default,
and it will break variable length array under some condition.
    
    Similar issue can be found from PostgreSQL 9.2. See the following links for detail:
    1. http://www.postgresql.org/message-id/14242.1365200084@sss.pgh.pa.us
    2. https://gcc.gnu.org/gcc-4.8/changes.html
    3. http://pkgs.fedoraproject.org/cgit/postgresql.git/commit/?h=f19&id=2a75d7af27fdf03e875f76f4c272c8435f565d10
    
    So, we just borrow the idea to fix this issue and create a patch. Please review it.
    Thanks.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/leoncamel/incubator-hawq HAWQ-233

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-hawq/pull/170.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #170
    
----
commit 3c777449ee8eb11227281394f10c4fb5faf37d77
Author: Xiaolin Zhang <zhangxl@zetyun.com>
Date:   2015-12-09T02:27:25Z

    HAWQ-233. Fix HAWQ initialization failed on Centos7

----


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