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https://issues.apache.org/jira/browse/HDFS-2572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13153819#comment-13153819
]
Harsh J commented on HDFS-2572:
-------------------------------
Failing test is unrelated btw:
{code}
java.lang.Exception: test timed out after 20000 milliseconds
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:220)
at
sun.security.provider.SeedGenerator$URLSeedGenerator.getSeedBytes(SeedGenerator.java:493)
at
sun.security.provider.SeedGenerator.generateSeed(SeedGenerator.java:117)
at
sun.security.provider.SecureRandom.engineGenerateSeed(SecureRandom.java:114)
at
sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:171)
at java.security.SecureRandom.nextBytes(SecureRandom.java:433)
at java.security.SecureRandom.next(SecureRandom.java:455)
at java.util.Random.nextInt(Random.java:257)
at
org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:990)
at
org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:537)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:136)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:607)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:149)
at
org.apache.hadoop.hdfs.DFSTestUtil.formatNameNode(DFSTestUtil.java:113)
at
org.apache.hadoop.hdfs.MiniDFSCluster.createNameNode(MiniDFSCluster.java:630)
at
org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:545)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:261)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:85)
at
org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:247)
at
org.apache.hadoop.hdfs.TestLocalDFS.testWorkingDirectory(TestLocalDFS.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at
org.junit.internal.runners.statements.FailOnTimeout$1.run(FailOnTimeout.java:28)
{code}
Seems like the machine ran out of entropy, and timed out.
> Unnecessary double-check in DN#getHostName
> ------------------------------------------
>
> Key: HDFS-2572
> URL: https://issues.apache.org/jira/browse/HDFS-2572
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Affects Versions: 0.24.0
> Reporter: Harsh J
> Assignee: Harsh J
> Priority: Trivial
> Fix For: 0.24.0
>
> Attachments: HDFS-2572.patch, HDFS-2572.patch
>
>
> We do a double config.get unnecessarily inside DN#getHostName(...). Can be
> removed by this patch.
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