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https://issues.apache.org/jira/browse/HDFS-6086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13931638#comment-13931638
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Hudson commented on HDFS-6086:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #507 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/507/])
HDFS-6086. Fix a case where zero-copy or no-checksum reads were not allowed
even when the block was cached. (cmccabe) (cmccabe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1576533)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/ShortCircuitReplica.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ShortCircuitRegistry.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetCache.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CacheManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestEnhancedByteBufferAccess.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java
> Fix a case where zero-copy or no-checksum reads were not allowed even when
> the block was cached
> -----------------------------------------------------------------------------------------------
>
> Key: HDFS-6086
> URL: https://issues.apache.org/jira/browse/HDFS-6086
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Fix For: 2.4.0
>
> Attachments: HDFS-6086.001.patch, HDFS-6086.002.patch
>
>
> We need to fix a case where zero-copy or no-checksum reads are not allowed
> even when the block is cached. The case is when the block is cached before
> the {{REQUEST_SHORT_CIRCUIT_FDS}} operation begins. In this case,
> {{DataXceiver}} needs to consult the {{ShortCircuitRegistry}} to see if the
> block is cached, rather than relying on a callback.
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