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https://issues.apache.org/jira/browse/HDFS-532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12742756#action_12742756
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Hadoop QA commented on HDFS-532:
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+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12416405/BlockMissingException2.txt
against trunk revision 803622.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/65/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/65/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/65/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-vesta.apache.org/65/console
This message is automatically generated.
> Allow applications to know that a read request failed because block is missing
> ------------------------------------------------------------------------------
>
> Key: HDFS-532
> URL: https://issues.apache.org/jira/browse/HDFS-532
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs client
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.21.0
>
> Attachments: BlockMissingException.patch, BlockMissingException2.txt
>
>
> I have an application that has intelligence to retrieve data from alternate
> locations if HDFS cannot provide this data. This can happen when data in HDFS
> is corrupted or the block is missing. HDFS already throws ChecksumException
> if the block is corrupted and throws a generic IOException if the block is
> missing. I would like HDFS to throw BlockMissingException when a read request
> encounters a block that has no locations associated with it.
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