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https://issues.apache.org/jira/browse/HDFS-14907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952065#comment-16952065
]
Erik Krogen commented on HDFS-14907:
------------------------------------
Thanks for reporting this [~tasanuma]. We partially fixed this issue in
HDFS-14717, but I think it only addressed the issue on the client side. It
seems that the DataNode side still needs help.
To make it more resilient to potential future changes in JUnit, can we at least
search for something matching {{junit-*.jar}} instead of a specific version?
> [Dynamometer] DataNode can't find junit jar when using Hadoop-3 binary
> ----------------------------------------------------------------------
>
> Key: HDFS-14907
> URL: https://issues.apache.org/jira/browse/HDFS-14907
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Takanobu Asanuma
> Priority: Major
>
> When executing {{start-dynamometer-cluster.sh}} with Hadoop-3 binary,
> datanodes fail to run with the following log and
> {{start-dynamometer-cluster.sh}} fails.
> {noformat}
> LogType:stderr
> LogLastModifiedTime:Wed Oct 09 15:03:09 +0900 2019
> LogLength:1386
> LogContents:
> Exception in thread "main" java.lang.NoClassDefFoundError: org/junit/Assert
> at
> org.apache.hadoop.test.GenericTestUtils.assertExists(GenericTestUtils.java:299)
> at
> org.apache.hadoop.test.GenericTestUtils.getTestDir(GenericTestUtils.java:243)
> at
> org.apache.hadoop.test.GenericTestUtils.getTestDir(GenericTestUtils.java:252)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.getBaseDirectory(MiniDFSCluster.java:2982)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.determineDfsBaseDir(MiniDFSCluster.java:2972)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.formatDataNodeDirs(MiniDFSCluster.java:2834)
> at
> org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(SimulatedDataNodes.java:123)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
> at
> org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.main(SimulatedDataNodes.java:88)
> Caused by: java.lang.ClassNotFoundException: org.junit.Assert
> at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> ... 9 more
> ./start-component.sh: line 317: kill: (2261) - No such process
> {noformat}
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