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Date: Tue, 9 Apr 2013 18:44:16 +0000 (UTC)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Assigned] (HDFS-4669) TestBlockPoolManager fails using IBM
 java
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     [ https://issues.apache.org/jira/browse/HDFS-4669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suresh Srinivas reassigned HDFS-4669:
-------------------------------------

    Assignee: Suresh Srinivas
    
> TestBlockPoolManager fails using IBM java
> -----------------------------------------
>
>                 Key: HDFS-4669
>                 URL: https://issues.apache.org/jira/browse/HDFS-4669
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 2.0.3-alpha
>            Reporter: Tian Hong Wang
>            Assignee: Suresh Srinivas
>              Labels: patch
>             Fix For: 2.0.3-alpha
>
>         Attachments: HADOOP-4669.patch
>
>
> TestBlockPoolManager unit test fails with the following error message using IBM java:
> testFederationRefresh(org.apache.hadoop.hdfs.server.datanode.TestBlockPoolManager)  Time elapsed: 27 sec  <<< FAILURE!
> org.junit.ComparisonFailure: expected:<stop #[1
> refresh #2]
> > but was:<stop #[2
> refresh #1]
> >
> The root cause is:
> (1)if we want to remove the first NS, keep the second NS, it should be conf.set(DFSConfigKeys.DFS_NAMESERVICES, ns2), not conf.set(DFSConfigKeys.DFS_NAMESERVICES, ns1).
> (2)Since HashMap & HashSet store the data in the random order way, so in ibm java & Oracle java, HashMap get the random order <key, value> that causing the random ns1&ns2 value.  So in the code, it should use LinkedHashMap & LinkedHashSet to keep the original order.

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