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https://issues.apache.org/jira/browse/HDFS-2095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13597992#comment-13597992
]
Hadoop QA commented on HDFS-2095:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12572915/HDFS-2095.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:red}-1 tests included{color}. The patch doesn't appear to include
any new or modified tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-hdfs-project/hadoop-hdfs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HDFS-Build/4065//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4065//console
This message is automatically generated.
> org.apache.hadoop.hdfs.server.datanode.DataNode#checkDiskError produces check
> storm making data node unavailable
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-2095
> URL: https://issues.apache.org/jira/browse/HDFS-2095
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 0.21.0
> Reporter: Vitalii Tymchyshyn
> Assignee: Todd Lipcon
> Attachments: HDFS-2095.patch, patch2.diff, patch.diff, pathch3.diff
>
>
> I can see that if data node receives some IO error, this can cause checkDir
> storm.
> What I mean:
> 1) any error produces DataNode.checkDiskError call
> 2) this call locks volume:
> java.lang.Thread.State: RUNNABLE
> at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
> at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:228)
> at java.io.File.exists(File.java:733)
> at
> org.apache.hadoop.util.DiskChecker.mkdirsWithExistsCheck(DiskChecker.java:65)
> at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:86)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.checkDirTree(FSDataset.java:228)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.checkDirTree(FSDataset.java:232)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.checkDirTree(FSDataset.java:232)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.checkDirTree(FSDataset.java:232)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.checkDirs(FSDataset.java:414)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.checkDirs(FSDataset.java:617)
> - locked <0x000000080a8faec0> (a
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet)
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset.checkDataDir(FSDataset.java:1681)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.checkDiskError(DataNode.java:745)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.checkDiskError(DataNode.java:735)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.close(BlockReceiver.java:202)
> at org.apache.hadoop.io.IOUtils.cleanup(IOUtils.java:151)
> at org.apache.hadoop.io.IOUtils.closeStream(IOUtils.java:167)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:646)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.opWriteBlock(DataXceiver.java:352)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.opWriteBlock(DataTransferProtocol.java:390)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.processOp(DataTransferProtocol.java:331)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:111)
> at java.lang.Thread.run(Thread.java:619)
> 3) This produces timeouts on other calls, e.g.
> 2011-06-17 17:35:03,922 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
> checkDiskError: exception:
> java.io.InterruptedIOException
> at java.io.FileOutputStream.writeBytes(Native Method)
> at java.io.FileOutputStream.write(FileOutputStream.java:260)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
> at java.io.DataOutputStream.flush(DataOutputStream.java:106)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.close(BlockReceiver.java:183)
> at org.apache.hadoop.io.IOUtils.cleanup(IOUtils.java:151)
> at org.apache.hadoop.io.IOUtils.closeStream(IOUtils.java:167)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:646)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.opWriteBlock(DataXceiver.java:352)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.opWriteBlock(DataTransferProtocol.java:390)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.processOp(DataTransferProtocol.java:331)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:111)
> at java.lang.Thread.run(Thread.java:619)
> 4) This, in turn, produces more "dir check calls".
> 5) All the cluster works very slow because of half-working node.
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