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https://issues.apache.org/jira/browse/HADOOP-15893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672822#comment-16672822
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sunlisheng commented on HADOOP-15893:
-------------------------------------
[~hadoopqa] [~raviprak] [~jzhuge]
hi, please help me answser the question.
Two test unit errors have nothing to do with my changes.
when I do test unit once, test unit succeed.
when I do test unit 100 times, test fail 3~5 times.
the error log:
java.lang.IllegalStateException: failed to create a child event loop
at
io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
at
io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:50)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:70)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:65)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:56)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:48)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:40)
at
org.apache.hadoop.hdfs.server.datanode.web.DatanodeHttpServer.<init>(DatanodeHttpServer.java:148)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:957)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1417)
at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:500)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2782)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2690)
at
org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes(MiniDFSCluster.java:1695)
at
org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:911)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:518)
at org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:477)
at
org.apache.hadoop.hdfs.TestReconstructStripedFile.testNNSendsErasureCodingTasks(TestReconstructStripedFile.java:474)
at
org.apache.hadoop.hdfs.TestReconstructStripedFile.testNNSendsErasureCodingTasks(TestReconstructStripedFile.java:457)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:748)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:176)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:150)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:103)
at
io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
... 30 more
Caused by: java.io.IOException: 打开的文件过多
at sun.nio.ch.IOUtil.makePipe(Native Method)
at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65)
at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:174)
... 33 more
> fs.TrashPolicyDefault: can't create trash directory and race condition
> ----------------------------------------------------------------------
>
> Key: HADOOP-15893
> URL: https://issues.apache.org/jira/browse/HADOOP-15893
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Reporter: sunlisheng
> Priority: Major
> Attachments: HADOOP-15893.001.patch, HADOOP-15893.002.patch
>
>
> After catch FileAlreadyExistsException, the same name file is deleted.
> So don't modify baseTrashPath when existsFilePath is deleted.
> But this case show hardly in untitest.
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