[
https://issues.apache.org/jira/browse/HDFS-8901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15231685#comment-15231685
]
Rakesh R commented on HDFS-8901:
--------------------------------
Thanks [~drankye] for the good work, it looks like the test case failure is
related. Please take a look at it.
{{org.apache.hadoop.hdfs.shortcircuit.TestShortCircuitLocalRead.testReadWithRemoteBlockReader}}
{code}
java.lang.UnsupportedOperationException: readDirect unsupported in
RemoteBlockReader
at
org.apache.hadoop.hdfs.RemoteBlockReader.read(RemoteBlockReader.java:481)
at
org.apache.hadoop.hdfs.DFSInputStream.actualGetFromOneDataNode(DFSInputStream.java:1204)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:1138)
{code}
> Use ByteBuffer in striping positional read
> ------------------------------------------
>
> Key: HDFS-8901
> URL: https://issues.apache.org/jira/browse/HDFS-8901
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Kai Zheng
> Attachments: HDFS-8901-v2.patch, HDFS-8901-v3.patch,
> HDFS-8901-v4.patch, HDFS-8901-v5.patch, HDFS-8901-v6.patch,
> HDFS-8901-v7.patch, initial-poc.patch
>
>
> Native erasure coder prefers to direct ByteBuffer for performance
> consideration. To prepare for it, this change uses ByteBuffer through the
> codes in implementing striping position read. It will also fix avoiding
> unnecessary data copying between striping read chunk buffers and decode input
> buffers.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
