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https://issues.apache.org/jira/browse/HADOOP-15711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607451#comment-16607451
]
Jonathan Hung commented on HADOOP-15711:
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FYI I am also seeing something similar in hadoop-yarn-client module -
https://issues.apache.org/jira/browse/YARN-8200?focusedCommentId=16607445&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16607445
> Fix branch-2 builds
> -------------------
>
> Key: HADOOP-15711
> URL: https://issues.apache.org/jira/browse/HADOOP-15711
> Project: Hadoop Common
> Issue Type: Task
> Reporter: Jonathan Hung
> Priority: Critical
>
> Branch-2 builds have been disabled for a while:
> https://builds.apache.org/view/H-L/view/Hadoop/job/hadoop-qbt-branch2-java7-linux-x86/
> A test run here causes hdfs tests to hang:
> https://builds.apache.org/view/H-L/view/Hadoop/job/hadoop-qbt-branch2-java7-linux-x86-jhung/4/
> Running hadoop-hdfs tests locally reveal some errors such
> as:{noformat}[ERROR]
> testComplexAppend2(org.apache.hadoop.hdfs.TestFileAppend2) Time elapsed:
> 0.059 s <<< ERROR!
> java.lang.OutOfMemoryError: unable to create new native thread
> at java.lang.Thread.start0(Native Method)
> at java.lang.Thread.start(Thread.java:714)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.saveFSImageInAllDirs(FSImage.java:1164)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.saveFSImageInAllDirs(FSImage.java:1128)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:174)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1172)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:403)
> at
> org.apache.hadoop.hdfs.DFSTestUtil.formatNameNode(DFSTestUtil.java:234)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.createNameNodesAndSetConf(MiniDFSCluster.java:1080)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:883)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:514)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:473)
> at
> org.apache.hadoop.hdfs.TestFileAppend2.testComplexAppend(TestFileAppend2.java:489)
> at
> org.apache.hadoop.hdfs.TestFileAppend2.testComplexAppend2(TestFileAppend2.java:543)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43){noformat}
> I was able to get more tests passing locally by increasing the max user
> process count on my machine. But the error suggests that there's an issue in
> the tests themselves. Not sure if the error seen locally is the same reason
> as why jenkins builds are failing, I wasn't able to confirm based on the
> jenkins builds' lack of output.
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