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https://issues.apache.org/jira/browse/HDFS-10810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15496965#comment-15496965
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Brahma Reddy Battula commented on HDFS-10810:
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Scenario is like
a) Enable batchIBR and write one block and close file
b) Call setrep on this file
c) As block is only committed,{{isNeededReconstruction}} will be false and
block will not updated in {{neededReconstruction}} hence this will not marked
as underreplicated.
> Setreplication removing block from underconstrcution temporarily when batch
> IBR is enabled.
> --------------------------------------------------------------------------------------------
>
> Key: HDFS-10810
> URL: https://issues.apache.org/jira/browse/HDFS-10810
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Attachments: HDFS-10810-002.patch, HDFS-10810.patch
>
>
> 1)Batch IBR is enabled with number of committed blocks allowed=1
> 2) Written one block and closed the file without waiting for IBR
> 3)Setreplication called immediately on the file.
> So till the finalized IBR Received, block will not be added to
> neededReconstruction
> {code}
> if (isNeededReconstruction(block, repl.liveReplicas())) {
> neededReconstruction.update(block, repl.liveReplicas(),
> repl.readOnlyReplicas(), repl.decommissionedAndDecommissioning(),
> curExpectedReplicas, curReplicasDelta, expectedReplicasDelta);
> }.{code}
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