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https://issues.apache.org/jira/browse/HDFS-4669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627816#comment-13627816
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Hudson commented on HDFS-4669:
------------------------------
Integrated in Hadoop-Mapreduce-trunk #1395 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1395/])
HDFS-4669. TestBlockPoolManager fails using IBM java. Contributed by Tian
Hong Wang. (Revision 1466176)
Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1466176
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockPoolManager.java
> 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: Tian Hong Wang
> Labels: patch
> Fix For: 2.0.5-beta
>
> 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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