[jira] [Updated] (HDFS-5244) TestNNStorageRetentionManager#testPurgeMultipleDirs fails because incorrectly expects Hashmap values to have order.

["Arun C Murthy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-5244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated HDFS-5244:
--------------------------------

    Fix Version/s:     (was: 2.3.0)
                   2.4.0

> TestNNStorageRetentionManager#testPurgeMultipleDirs fails because incorrectly expects Hashmap values to have order. 
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5244
>                 URL: https://issues.apache.org/jira/browse/HDFS-5244
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 2.1.0-beta
>         Environment: Red Hat Enterprise 6 with Sun Java 1.7 and IBM java 1.6
>            Reporter: Jinghui Wang
>            Assignee: Jinghui Wang
>             Fix For: 3.0.0, 2.1.0-beta, 2.4.0
>
>         Attachments: HDFS-5244.patch
>
>
> The test o.a.h.hdfs.server.namenode.TestNNStorageRetentionManager uses a HashMap(dirRoots) to store the root storages to be mocked for the purging test, which does not have any predictable order. The directories needs be purged are stored in a LinkedHashSet, which has a predictable order. So, when the directories get mocked for the test, they could be already out of
> the order that they were added. Thus, the order that the directories were
> actually purged and the order of them being added to the LinkedHashList could
> be different and cause the test to fail.



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