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https://issues.apache.org/jira/browse/HDFS-6397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14003259#comment-14003259
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Hudson commented on HDFS-6397:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #562 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/562/])
HDFS-6397. NN shows inconsistent value in deadnode count. Contributed by
Mohammad Kamrul Islam. (kihwal:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1595978)
* /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/server/blockmanagement/DatanodeManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestHostsFiles.java
> NN shows inconsistent value in deadnode count
> ----------------------------------------------
>
> Key: HDFS-6397
> URL: https://issues.apache.org/jira/browse/HDFS-6397
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.1
> Reporter: Mohammad Kamrul Islam
> Assignee: Mohammad Kamrul Islam
> Priority: Critical
> Fix For: 3.0.0, 2.4.1
>
> Attachments: HDFS-6397.1.patch, HDFS-6397.2.patch, HDFS-6397.3.patch,
> HDFS-6397.branch-2.merge.patch
>
>
> Context:
> When NN is started , without any live datanode but there are nodes in the
> dfs.includes, NN shows the deadcount as '0'.
> There are two inconsistencies:
> 1. If you click on deadnode links (which shows the count is 0), it will
> display the list of deadnodes correctly.
> 2. hadoop 1.x used to display the count correctly.
> The following snippets of JMX response will explain it further:
> Look at the value of "NumDeadDataNodes"
> {noformat}
> {
> "name" : "Hadoop:service=NameNode,name=FSNamesystemState",
> "modelerType" : "org.apache.hadoop.hdfs.server.namenode.FSNamesystem",
> "CapacityTotal" : 0,
> "CapacityUsed" : 0,
> ...
> "NumLiveDataNodes" : 0,
> "NumDeadDataNodes" : 0,
> "NumDecomLiveDataNodes" : 0,
> "NumDecomDeadDataNodes" : 0,
> "NumDecommissioningDataNodes" : 0,
> "NumStaleDataNodes" : 0
> },
> {noformat}
> Look at " "DeadNodes"".
> {noformat}
> {
> "name" : "Hadoop:service=NameNode,name=NameNodeInfo",
> "modelerType" : "org.apache.hadoop.hdfs.server.namenode.FSNamesystem",
>
> ....
> "TotalBlocks" : 70,
> "TotalFiles" : 129,
> "NumberOfMissingBlocks" : 0,
> "LiveNodes" : "{}",
> "DeadNodes" :
> "{\"<MMMMM>.linkedin.com\":{\"lastContact\":1400037397,\"decommissioned\":false,\"xferaddr\":\"172.XX.X.XX:71\"},\"<NNNNN>.linkedin.com\":{\"lastContact\":1400037397,\"decommissioned\":false,\"xferaddr\":\"172.XX.XX.XX:71\"}}",
> "DecomNodes" : "{}",
> .....
> }
> {noformat}
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