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https://issues.apache.org/jira/browse/HDFS-6515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186650#comment-14186650
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Tony Reix commented on HDFS-6515:
---------------------------------
Patching the trunk of Hadoop Common trunk from official GitHub with the patch
provided here works perfectly :
$ patch -p0 < ../HDFS-6515-1.patch
patching file
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/nativeio/NativeIO.java
Hunk #1 succeeded at 166 (offset 1 line).
patching file
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestFsDatasetCache.java
I've checked the 2 files and they are OK.
> testPageRounder (org.apache.hadoop.hdfs.server.datanode.TestFsDatasetCache)
> -----------------------------------------------------------------------------
>
> Key: HDFS-6515
> URL: https://issues.apache.org/jira/browse/HDFS-6515
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 3.0.0, 2.4.0
> Environment: Linux on PPC64
> Tested with Hadoop 3.0.0 SNAPSHOT, on RHEL 6.5, on Ubuntu 14.04, on Fedora
> 19, using mvn -Dtest=TestFsDatasetCache#testPageRounder -X test
> Reporter: Tony Reix
> Priority: Blocker
> Labels: test
> Attachments: HDFS-6515-1.patch
>
>
> I have an issue with test :
> testPageRounder
> (org.apache.hadoop.hdfs.server.datanode.TestFsDatasetCache)
> on Linux/PowerPC.
> On Linux/Intel, test runs fine.
> On Linux/PowerPC, I have:
> testPageRounder(org.apache.hadoop.hdfs.server.datanode.TestFsDatasetCache)
> Time elapsed: 64.037 sec <<< ERROR!
> java.lang.Exception: test timed out after 60000 milliseconds
> Looking at details, I see that some "Failed to cache " messages appear in the
> traces. Only 10 on Intel, but 186 on PPC64.
> On PPC64, it looks like some thread is waiting for something that never
> happens, generating a TimeOut.
> I'm now using IBM JVM, however I've just checked that the issue also appears
> with OpenJDK.
> I'm now using Hadoop latest, however, the issue appeared within Hadoop 2.4.0 .
> I need help for understanding what the test is doing, what traces are
> expected, in order to understand what/where is the root cause.
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