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https://issues.apache.org/jira/browse/PIG-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480374#comment-13480374
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Jonathan Coveney commented on PIG-2975:
---------------------------------------

Gianmarco,

That's what I'm currently pondering as well. Is there any reason why 
DataByteArray sorting needs to be stable across releases? I believe the docs 
say that there are no guarantees, which means it is subject to change at any 
time. If people want defined semantics in this respect, they can just cast it 
to the appropriate data type., no?
                
> TestTypedMap.testOrderBy failing with incorrect result 
> -------------------------------------------------------
>
>                 Key: PIG-2975
>                 URL: https://issues.apache.org/jira/browse/PIG-2975
>             Project: Pig
>          Issue Type: Sub-task
>    Affects Versions: 0.11
>            Reporter: Koji Noguchi
>            Assignee: Koji Noguchi
>            Priority: Blocker
>             Fix For: 0.11
>
>         Attachments: PIG-2975-0_jco.patch, PIG-2975-0_jco-v2.patch, 
> pig-2975-trunk_v01.txt, pig-2975-trunk_v02-broken.txt, 
> pig-2975-trunk_v03-unionapproach.txt, pig-2975-trunk_v04-purerawcompare.txt
>
>
> Looked at 
> {noformat}
> junit.framework.AssertionFailedError
>     at org.apache.pig.test.TestTypedMap.testOrderBy(TestTypedMap.java:352)
> {noformat}
> This looks like a valid test case failing with incorrect result.
> {noformat}
> % cat test/orderby.txt
> [key#1,key9#23]
> [key#3,key3#2]
> [key#22]
> % cat test/orderby.pig
> a = load 'test/orderby.txt' as (m:[]);
> b = foreach a generate m#'key' as b0;
> dump b;
> c = order b by b0;
> dump c;
> % java ... org.apache.pig.Main    -x local test/orderby.pig 
> [dump b]
> (1)
> (3)
> (22)
> ...
> [dump c]
> (1)
> (1)
> (22)
> %
> where did the '(3)' go?
> {noformat}

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