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Message-ID: <23762382.108711291447691039.JavaMail.jira@thor>
Date: Sat, 4 Dec 2010 02:28:11 -0500 (EST)
From: "Konstantin Boudnik (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-1527) SocketOutputStream.transferToFully
 fails for blocks >= 2GB on 32 bit JVM
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    [ https://issues.apache.org/jira/browse/HDFS-1527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966799#action_12966799 ] 

Konstantin Boudnik commented on HDFS-1527:
------------------------------------------

This line needs to go to for it become unused import 
{code}
import static org.junit.Assume.assumeTrue;
{code}

Rest looks ok to me. Have you ran the rest of HDFS tests with this patch?

> SocketOutputStream.transferToFully fails for blocks >= 2GB on 32 bit JVM
> ------------------------------------------------------------------------
>
>                 Key: HDFS-1527
>                 URL: https://issues.apache.org/jira/browse/HDFS-1527
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.23.0
>         Environment: 32 bit JVM
>            Reporter: Patrick Kling
>            Assignee: Patrick Kling
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1527.patch
>
>
> On 32 bit JVM, SocketOutputStream.transferToFully() fails if the block size is >= 2GB. We should fall back to a normal transfer in this case. 
> {code}
> 2010-12-02 19:04:23,490 ERROR datanode.DataNode (BlockSender.java:sendChunks(399)) - BlockSender.sendChunks() exception: java.io.IOException: Value too large
>  for defined data type
>         at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
>         at sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:418)
>         at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:519)
>         at org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:204)
>         at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendChunks(BlockSender.java:386)
>         at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:475)
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.opReadBlock(DataXceiver.java:196)
>         at org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.opReadBlock(DataTransferProtocol.java:356)
>         at org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.processOp(DataTransferProtocol.java:328)
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:130)
>         at java.lang.Thread.run(Thread.java:619)
> {code}

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