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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7491) Add incremental blockreport latency to DN metrics
Date Thu, 12 Mar 2015 14:49:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14358754#comment-14358754
] 

Hudson commented on HDFS-7491:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #121 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/121/])
HDFS-7491. Add incremental blockreport latency to DN metrics. Contributed by Ming Ma. (cnauroth:
rev fb34f45727e63ea55377fe90241328025307d818)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeMetrics.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 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


> 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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