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Date: Tue, 31 Mar 2015 01:01:53 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12786017.1427404795000.75114.1427763713309@Atlassian.JIRA>
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Subject: [jira] [Commented] (HDFS-7996) After swapping a volume,
 BlockReceiver reports ReplicaNotFoundException
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    [ https://issues.apache.org/jira/browse/HDFS-7996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14387739#comment-14387739 ] 

Hadoop QA commented on HDFS-7996:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12708235/HDFS-7996.001.patch
  against trunk revision d9ac5ee.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc 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 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistFiles
                  org.apache.hadoop.hdfs.server.namenode.TestFileTruncate

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/10115//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/10115//console

This message is automatically generated.

> After swapping a volume, BlockReceiver reports ReplicaNotFoundException
> -----------------------------------------------------------------------
>
>                 Key: HDFS-7996
>                 URL: https://issues.apache.org/jira/browse/HDFS-7996
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.6.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>            Priority: Critical
>         Attachments: HDFS-7996.000.patch, HDFS-7996.001.patch
>
>
> When removing a disk from an actively writing DataNode, the BlockReceiver working on the disk throws {{ReplicaNotFoundException}} because the replicas are removed from the memory:
> {code}
> 2015-03-26 08:02:43,154 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Removed volume: /data/2/dfs/dn/current
> 2015-03-26 08:02:43,163 INFO org.apache.hadoop.hdfs.server.common.Storage: Removing block level storage: /data/2/dfs/dn/current/BP-51301509-10.20.202.114-1427296597742
> 2015-03-26 08:02:43,163 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in BlockReceiver.run():
> org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Cannot append to a non-existent replica BP-51301509-10.20.202.114-1427296597742:blk_1073742979_2160
>         at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.getReplicaInfo(FsDatasetImpl.java:615)
>         at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.finalizeBlock(FsDatasetImpl.java:1362)
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver$PacketResponder.finalizeBlock(BlockReceiver.java:1281)
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver$PacketResponder.run(BlockReceiver.java:1241)
>         at java.lang.Thread.run(Thread.java:745)
> {code}
> {{FsVolumeList#removeVolume}} waits all threads release {{FsVolumeReference}} on the volume to be removed, however, in {{PacketResponder#finalizeBlock()}}, it calls
> {code}
> private void finalizeBlock(long startTime) throws IOException {
>       BlockReceiver.this.close();
>       final long endTime = ClientTraceLog.isInfoEnabled() ? System.nanoTime()
>           : 0;
>       block.setNumBytes(replicaInfo.getNumBytes());
>       datanode.data.finalizeBlock(block);
> {code}
> The {{FsVolumeReference}} was released in {{BlockReceiver.this.close()}} before calling {{datanode.data.finalizeBlock(block)}}.


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