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https://issues.apache.org/jira/browse/HDFS-5076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13742093#comment-13742093
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Hudson commented on HDFS-5076:
------------------------------
SUCCESS: Integrated in Hadoop-Yarn-trunk #303 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/303/])
HDFS-5076. Add MXBean methods to query NN's transaction information and
JournalNode's journal status. Contributed by Jing Zhao. (jing9:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1514422)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNodeMXBean.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeMXBean.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/qjournal/server/TestJournalNodeMXBean.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
> Add MXBean methods to query NN's transaction information and JournalNode's
> journal status
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-5076
> URL: https://issues.apache.org/jira/browse/HDFS-5076
> Project: Hadoop HDFS
> Issue Type: New Feature
> Affects Versions: 3.0.0
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: 2.1.1-beta
>
> Attachments: HDFS-5076.001.patch, HDFS-5076.002.patch,
> HDFS-5076.003.patch, HDFS-5076.004.patch, HDFS-5076.005.patch
>
>
> Currently NameNode already provides RPC calls to get its last applied
> transaction ID and most recent checkpoint's transaction ID. It can be helpful
> to provide support to enable querying these information through JMX, so that
> administrators and applications like Ambari can easily decide if a forced
> checkpoint by calling saveNamespace is necessary. Similarly we can add MxBean
> interface for JournalNodes to query the status of journals (e.g., whether
> journals are formatted or not).
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