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https://issues.apache.org/jira/browse/HDFS-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14358537#comment-14358537
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Hudson commented on HDFS-7491:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #864 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/864/])
HDFS-7491. Add incremental blockreport latency to DN metrics. Contributed by
Ming Ma. (cnauroth: rev fb34f45727e63ea55377fe90241328025307d818)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/metrics/DataNodeMetrics.java
* hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeMetrics.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> Add incremental blockreport latency to DN metrics
> -------------------------------------------------
>
> Key: HDFS-7491
> URL: https://issues.apache.org/jira/browse/HDFS-7491
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Ming Ma
> Assignee: Ming Ma
> Priority: Minor
> Fix For: 2.7.0
>
> Attachments: HDFS-7491-2.patch, HDFS-7491-3.patch, HDFS-7491-4.patch,
> HDFS-7491-branch-2.patch, HDFS-7491.patch
>
>
> In a busy cluster, IBR processing could be delayed due to NN FSNamesystem
> lock and cause NN to throw NotReplicatedYetException to DFSClient and thus
> increase the overall application latency.
> This will be taken care of when we address the NN FSNamesystem lock
> contention issue.
> It is useful if we can provide IBR latency metrics from DN's point of view.
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