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https://issues.apache.org/jira/browse/HDFS-14641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wei-Chiu Chuang resolved HDFS-14641.
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Resolution: Invalid
[~belugabehr]
I think this is the expected behavior. COMITTED means client finishes writing
the block, and told the NN about it, COMPLETE means that additionally, DN sends
a IBR for the same block.
> Possible Intermediate Block Report Race Condition
> -------------------------------------------------
>
> Key: HDFS-14641
> URL: https://issues.apache.org/jira/browse/HDFS-14641
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.2.0
> Reporter: David Mollitor
> Priority: Major
>
> I am doing some playing around in the DataNode and if I set a small delay
> (100ms) before sending the intermediate block reports, the file files to
> transfer.
> This is a one-node cluster with a tiny file (2 bytes). Here is the output
> from the NameNode:
> {code:none}
> 2019-07-09 20:45:37,198 INFO namenode.FSNamesystem: BLOCK*
> blk_1073741829_1005 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1)
> in file /tmp/sent.12.data._COPYING_
> 2019-07-09 20:45:37,606 INFO namenode.FSNamesystem: BLOCK*
> blk_1073741829_1005 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1)
> in file /tmp/sent.12.data._COPYING_
> 2019-07-09 20:45:38,413 INFO namenode.FSNamesystem: BLOCK*
> blk_1073741829_1005 is COMMITTED but not COMPLETE(numNodes= 1 >= minimum =
> 1) in file /tmp/sent.12.data._COPYING_
> 2019-07-09 20:45:40,023 INFO namenode.FSNamesystem: BLOCK*
> blk_1073741829_1005 is COMMITTED but not COMPLETE(numNodes= 1 >= minimum =
> 1) in file /tmp/sent.12.data._COPYING_
> {code}
> If I setup a thread that watches for IBRs and send them to the NN
> immediately, the file transfers successfully. There may be a race condition
> here.
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