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From "Lars Volker (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-5757: Order-dependent comparison fails in test kudu
Date Thu, 03 Aug 2017 22:33:09 GMT
Lars Volker has posted comments on this change.

Change subject: IMPALA-5757: Order-dependent comparison fails in test_kudu
......................................................................


Patch Set 1:

> > > (1 comment)
 > >
 > > I recently changed several places in the FE to use LinkedHashMaps
 > > in order to get deterministic ordering. That included
 > > ToSqlUtils.java:212, so I'm surprised the order is not
 > > deterministic. I suspect that file has the code that needs
 > fixing,
 > > possibly L427 propertyMapToSql(). Maybe it'd be best to sort the
 > > properties to be completely independent from the underlying
 > > storage.
 > 
 > Yup, that looks correct. I think we can just create a LinkedHashSet
 > from the entrySet(). Hopefully that won't break too many existing
 > tests.

At that poing propertyMap is already a LinkedHashMap, so I think the order of the entrySet
should be stable (see https://stackoverflow.com/questions/1190083/does-entryset-in-a-linkedhashmap-also-guarantee-order).

I think msTable.getParameters() returns a Map<>, which means we may have to sort it
to get a deterministic order.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I64ce0c49fcbab3a4810d52c131bc176f8567ff9e
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Matthew Jacobs <mj@cloudera.com>
Gerrit-Reviewer: Jim Apple <jbapple-impala@apache.org>
Gerrit-Reviewer: Lars Volker <lv@cloudera.com>
Gerrit-Reviewer: Matthew Jacobs <mj@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-HasComments: No

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