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https://issues.apache.org/jira/browse/HDFS-8254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938422#comment-14938422
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Hudson commented on HDFS-8254:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2408 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2408/])
HDFS-8254. Avoid assigning a leading streamer in StripedDataStreamer to (jing9:
rev 3682e01984b6d93b35376532da8a8823d69239df)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/StripedDataStreamer.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/impl/DfsClientConf.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSStripedOutputStreamWithFailure.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DataStreamer.java
*
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/HdfsClientConfigKeys.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/StripedBlockUtil.java
> Avoid assigning a leading streamer in StripedDataStreamer to tolerate
> datanode failure
> --------------------------------------------------------------------------------------
>
> Key: HDFS-8254
> URL: https://issues.apache.org/jira/browse/HDFS-8254
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Fix For: HDFS-7285
>
> Attachments: h8254_20150526.patch, h8254_20150526b.patch,
> h8254_20150616.patch, h8254_20150618.patch
>
>
> StripedDataStreamer javadoc is shown below.
> {code}
> * The StripedDataStreamer class is used by {@link DFSStripedOutputStream}.
> * There are two kinds of StripedDataStreamer, leading streamer and ordinary
> * stream. Leading streamer requests a block group from NameNode, unwraps
> * it to located blocks and transfers each located block to its corresponding
> * ordinary streamer via a blocking queue.
> {code}
> Leading streamer is the streamer with index 0. When the datanode of the
> leading streamer fails, the other steamers cannot continue since no one will
> request a block group from NameNode anymore.
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