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

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

Mit Desai created HADOOP-10581:
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             Summary: 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


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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