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https://issues.apache.org/jira/browse/HDFS-690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768419#action_12768419
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Hairong Kuang commented on HDFS-690:
------------------------------------
Unit test is not included because it is supposed to make
TestAppend2#testComplexAppend work.
> TestAppend2#testComplexAppend failed on "Too many open files"
> -------------------------------------------------------------
>
> Key: HDFS-690
> URL: https://issues.apache.org/jira/browse/HDFS-690
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 0.21.0
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: leakingThreads.patch
>
>
> the append write failed on "Too many open files":
> Some bytes were failed to append to a file on the following error:
> java.io.IOException: Cannot run program "stat": java.io.IOException:
> error=24, Too many open files
> at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
> at java.lang.Runtime.exec(Runtime.java:593)
> at java.lang.Runtime.exec(Runtime.java:466)
> at
> org.apache.hadoop.fs.FileUtil$HardLink.getLinkCount(FileUtil.java:644)
> at
> org.apache.hadoop.hdfs.server.datanode.ReplicaInfo.unlinkBlock(ReplicaInfo.java:205)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset.append(FSDataset.java:1075)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset.append(FSDataset.java:1058)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:110)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.opWriteBlock(DataXceiver.java:258)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.opWriteBlock(DataTransferProtocol.java:382)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.processOp(DataTransferProtocol.java:323)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:111)
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