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From "Alan Burlison (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11505) Various native parts use bswap incorrectly and unportably
Date Tue, 19 Jan 2016 20:55:40 GMT

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Alan Burlison commented on HADOOP-11505:
----------------------------------------

bq. perhaps it is a SNAPSHOT dependency?
Could be, I'll have a dig around and see if I can figure it out. The odd thing is that if
I rebuilt from the repo root nothing new is pulled down into the maven repo but the build
succeeds - most odd...
bq. it would be a great service to everyone if this time could be reduced
I've had a poke at this but haven't been successful so far, my first stab was to try to change
the antrun bits in the pom.xml so that cmake only got called to regenerate the Makefile if
the corresponding CMakeLists.txt was newer than it but I got lost in the twisty maze between
where maven finishes and the antrun plugin starts. Ugh :-( The other potential problem is
the javah parts, I'm not sure but it looks like javah is getting called unnecessarily as well,
and of course if the header files are regenerated that will most likely trigger a make recompile
anyway. I know way more about make than I do about ant, and way more about ant than maven
plus the maven documentation is generally dreadful anyway, sigh ...
bq. I can't duplicate this
It's completely reproducible for me, but I have a different set of patches applied to you.
I'll check to see if it behaves the same way on Linux tomorrow.

> Various native parts use bswap incorrectly and unportably
> ---------------------------------------------------------
>
>                 Key: HADOOP-11505
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11505
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Alan Burlison
>             Fix For: 3.0.0
>
>         Attachments: HADOOP-11505.001.patch, HADOOP-11505.003.patch, HADOOP-11505.004.patch,
HADOOP-11505.005.patch, HADOOP-11505.006.patch, HADOOP-11505.007.patch
>
>
> hadoop-mapreduce-client-nativetask fails to use x86 optimizations in some cases.  Also,
on some alternate, non-x86, non-ARM architectures the generated code is incorrect.  Thanks
to Steve Loughran and Edward Nevill for finding this.



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