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https://issues.apache.org/jira/browse/HDFS-6943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14125847#comment-14125847
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Jing Zhao commented on HDFS-6943:
---------------------------------
HDFS-7030 has been created to address [~ozawa]'s comments.
> Improve NN allocateBlock log to include replicas' datanode IPs
> --------------------------------------------------------------
>
> Key: HDFS-6943
> URL: https://issues.apache.org/jira/browse/HDFS-6943
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ming Ma
> Assignee: Ming Ma
> Fix For: 2.6.0
>
> Attachments: HDFS-6943.patch
>
>
> Datanode storage ID used to use IP and port. It has changed to use UUID. This
> makes debugging harder when we want to understand which DNs are assigned when
> DFSClient calls addBlock. For example,
> {noformat}
> BLOCK* allocateBlock: /foo. BP-1980237412-xx.xx.xxx.xxx-1408142057773
> blk_1227779764_154043834{blockUCState=UNDER_CONSTRUCTION,
> primaryNodeIndex=-1,
> replicas=[ReplicaUnderConstruction[[DISK]DS-9479727b-24c5-4068-8703-dfb9a41c056c:NORMAL|RBW],
>
> ReplicaUnderConstruction[[DISK]DS-abe7840c-1db8-4623-9da7-3aed6a28c4f4:NORMAL|RBW],
>
> ReplicaUnderConstruction[[DISK]DS-956023f4-56a0-4c30-a148-b78c61cf764b:NORMAL|RBW]]}
> {noformat}
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