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https://issues.apache.org/jira/browse/HDFS-7210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14228787#comment-14228787
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Hudson commented on HDFS-7210:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #1972 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1972/])
HDFS-7210. Avoid two separate RPC's namenode.append() and
namenode.getFileInfo() for an append call from DFSClient. (Vinayakumar B via
umamahesh) (umamahesh: rev 1556f86a31a54733d6550363aa0e027acca7823b)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNamenodeRetryCache.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/proto/ClientNamenodeProtocol.proto
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestRetryCacheWithHA.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/LastBlockWithStatus.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolTranslatorPB.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/ClientNamenodeProtocolServerSideTranslatorPB.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/ClientProtocol.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> Avoid two separate RPC's namenode.append() and namenode.getFileInfo() for an
> append call from DFSClient
> -------------------------------------------------------------------------------------------------------
>
> Key: HDFS-7210
> URL: https://issues.apache.org/jira/browse/HDFS-7210
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client, namenode
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
> Fix For: 3.0.0, 2.7.0
>
> Attachments: HDFS-7210-001.patch, HDFS-7210-002.patch,
> HDFS-7210-003.patch, HDFS-7210-004.patch, HDFS-7210-005.patch,
> HDFS-7210-006.patch
>
>
> Currently DFSClient does 2 RPCs to namenode for an append operation.
> {{append()}} for re-opening the file and getting the last block,
> {{getFileInfo()}} Another on to get HdfsFileState
> If we can combine result of these 2 calls and make one RPC, then it can
> reduce load on NameNode.
> For the backward compatibility we need to keep existing {{append()}} call as
> is
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