GNU bug report logs - #28539
different outputs of sort

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: "He, Yihan" <yihan.he <at> intel.com>
Subject: bug#28539: closed (Re: bug#28539: different outputs of sort)
Date: Thu, 21 Sep 2017 15:37:03 +0000

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Your bug report

#28539: different outputs of sort 

which was filed against the coreutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 28539 <at> debbugs.gnu.org.

-- 
28539: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=28539
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eric Blake <eblake <at> redhat.com>
To: "He, Yihan" <yihan.he <at> intel.com>, 28539-done <at> debbugs.gnu.org
Cc: "Ji, Zhenlong Z" <zhenlong.z.ji <at> intel.com>, "Wang,
 Tao W" <tao.w.wang <at> intel.com>
Subject: Re: bug#28539: different outputs of sort
Date: Thu, 21 Sep 2017 10:36:12 -0500

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tag 28539 notabug
thanks

On 09/21/2017 01:56 AM, He, Yihan wrote:
> Hi,
> 
> We are facing issue when using sort, could you please help us to understand why? Thanks a lot.

Thanks for your report.  However, I suspect that the difference you are
seeing is the result of a FAQ:
https://www.gnu.org/software/coreutils/faq/coreutils-faq.html#Sort-does-not-sort-in-normal-order_0021
namely, that you have different locale settings between your two machines.

> 
> We run below command on two servers, but got different outputs. I attached source file (property_contexts) and two outputs files(sort_property_context_local.txt & sort_property_context_slave.txt).
> $sort -u property_contexts -o sort_property_context.txt
> 
> As checked, we use same version of sort on that two servers:
> local:~ $sort --version
> sort (GNU coreutils) 8.21

Note that this version of sort includes 'sort --debug', which is useful
in diagnosing issues like this.

Here's a trimmed-down example that produces similar behavior for me,
with the locale being explicit:

$ printf 'a\n# b\nc\n' | LC_ALL=C sort --debug
sort: using simple byte comparison
# b
___
a
_
c
_

$ printf 'a\n# b\nc\n' | LC_ALL=en_US.utf8 sort --debug
sort: using ‘en_US.utf8’ sorting rules
a
_
# b
___
c
_


That is, in the en_US.utf8 locale, the locale instructs sort to ignore
punctuation and sort case-insensitively, whereas the C locale sorts by
strict byte order.

As such, I'm tagging this issue as not a bug, but feel free to follow up
with further information, including any evidence you might have that
there is a real bug once locales have been accounted for.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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From: "He, Yihan" <yihan.he <at> intel.com>
To: "bug-coreutils <at> gnu.org" <bug-coreutils <at> gnu.org>
Cc: "Ji, Zhenlong Z" <zhenlong.z.ji <at> intel.com>, "Wang,
 Tao W" <tao.w.wang <at> intel.com>
Subject: different outputs of sort 
Date: Thu, 21 Sep 2017 06:56:53 +0000

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Hi,

We are facing issue when using sort, could you please help us to understand why? Thanks a lot.

We run below command on two servers, but got different outputs. I attached source file (property_contexts) and two outputs files(sort_property_context_local.txt & sort_property_context_slave.txt).
$sort -u property_contexts -o sort_property_context.txt

As checked, we use same version of sort on that two servers:
local:~ $sort --version
sort (GNU coreutils) 8.21
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and Paul Eggert.
--------------------------------------------------------
slave:~ $sort --version
sort (GNU coreutils) 8.21
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and Paul Eggert.


Best Regards

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[sort_property_context_slave.txt (text/plain, attachment)]

[sort_property_context_local.txt (text/plain, attachment)]

[property_contexts (application/octet-stream, attachment)]

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