[jira] [Created] (HDFS-14641) Possible Intermediate Block Report Race Condition

["David Mollitor (JIRA)" <ji...@apache.org>]

David Mollitor created HDFS-14641:
-------------------------------------

             Summary: 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


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.  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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