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Posted to issues@hive.apache.org by "Wei Zheng (JIRA)" <ji...@apache.org> on 2016/05/31 21:28:12 UTC

[jira] [Commented] (HIVE-13834) Use LinkedHashMap instead of HashMap for LockRequestBuilder to maintain predictable iteration order

    [ https://issues.apache.org/jira/browse/HIVE-13834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15308658#comment-15308658 ] 

Wei Zheng commented on HIVE-13834:
----------------------------------

[~ekoifman] Can you take a look? As Apache precommit tests have been moved to JDK 8, there's currently a test failure due to this.

> Use LinkedHashMap instead of HashMap for LockRequestBuilder to maintain predictable iteration order
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-13834
>                 URL: https://issues.apache.org/jira/browse/HIVE-13834
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 1.3.0, 2.1.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>         Attachments: HIVE-13834.1.patch
>
>
> In Java 7 it is assumed the iteration order is always the same as the insert order, but that's not guaranteed. In Java 8 some unit test breaks because of this ordering change. Solution is to use LinkedHashMap.



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