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https://issues.apache.org/jira/browse/HDFS-8137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14937147#comment-14937147
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Hudson commented on HDFS-8137:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk #2379 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/2379/])
HDFS-8137. Send the EC schema to DataNode via EC encoding/recovering (zhezhang:
rev 436c14855aef58a551d5cab91eba6e88775c6797)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/BlockECRecoveryCommand.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Namesystem.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/proto/erasurecoding.proto
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeDescriptor.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/protocolPB/TestPBHelper.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
> Send the EC schema to DataNode via EC encoding/recovering command
> -----------------------------------------------------------------
>
> Key: HDFS-8137
> URL: https://issues.apache.org/jira/browse/HDFS-8137
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Uma Maheswara Rao G
> Fix For: HDFS-7285
>
> Attachments: HDFS-8137-0.patch, HDFS-8137-1.patch, HDFS-8137-2.patch
>
>
> Discussed with [~umamaheswararao] and [~vinayrpet], we should also send the
> EC schema to DataNode as well contained in the EC encoding/recovering
> command. The target DataNode will use it to guide the executing of the task.
> Another way would be, DataNode would just request schema actively thru a
> separate RPC call, and as an optimization consideration, DataNode may cache
> schemas to avoid repeatedly asking for the same schema twice.
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