[jira] [Updated] (HADOOP-10581) TestUserGroupInformation#testGetServerSideGroups fails because groups stored in Set and ArrayList are compared

["Mit Desai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-10581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mit Desai updated HADOOP-10581:
-------------------------------

    Attachment: HADOOP-10581.patch

Attaching the patch for trunk, branch-2.4 and branch-2

> TestUserGroupInformation#testGetServerSideGroups fails because groups stored in Set and ArrayList are compared
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-10581
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10581
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 2.4.1
>            Reporter: Mit Desai
>            Assignee: Mit Desai
>         Attachments: HADOOP-10581.patch
>
>
> The test fails on some machines that has variety of user groups.
> Initially the groups are extracted and stored in a set
> {{Set<String> groups = new LinkedHashSet<String> ();}}
> when the user groups are collected by calling the {{login.getGroupNames()}}, they are stored in an array list
> {{String[] gi = login.getGroupNames();}}
> Because these groups are stored in different structure, there will be inconsistency in the group count. Sets have unique list of keys while array list emits everything they have.
> {{assertEquals(groups.size(), gi.length);}} fails when there are more than one groups with same name as the count in sets will be less than the arraylist.



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