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https://issues.apache.org/jira/browse/HDFS-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Masatake Iwasaki updated HDFS-1172:
-----------------------------------
Attachment: HDFS-1172.012.patch
I update the patch.
* addressed the failure of TestRecoverStripedFile: fixed to avoid updating
pendingReplications if file is striped.
* added calling to {{DataNodeTestUtils#triggerHeartbeat}} in order to make sure
{{TestReplication#testNoExtraReplicationWhenBlockReceivedIsLate}} fails without
the fix of BlockManager.
* fixed checkstyle warning except for file length.
* fixed whitespace error.
* release audit is not related to the fix.
* failure of TestBlockReport and TestCheckpoint is not related to the code path
of the patch. I could not reproduce the failure on my env.
> Blocks in newly completed files are considered under-replicated too quickly
> ---------------------------------------------------------------------------
>
> Key: HDFS-1172
> URL: https://issues.apache.org/jira/browse/HDFS-1172
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 0.21.0
> Reporter: Todd Lipcon
> Assignee: Masatake Iwasaki
> Attachments: HDFS-1172-150907.patch, HDFS-1172.008.patch,
> HDFS-1172.009.patch, HDFS-1172.010.patch, HDFS-1172.011.patch,
> HDFS-1172.012.patch, HDFS-1172.patch, hdfs-1172.txt, hdfs-1172.txt,
> replicateBlocksFUC.patch, replicateBlocksFUC1.patch, replicateBlocksFUC1.patch
>
>
> I've seen this for a long time, and imagine it's a known issue, but couldn't
> find an existing JIRA. It often happens that we see the NN schedule
> replication on the last block of files very quickly after they're completed,
> before the other DNs in the pipeline have a chance to report the new block.
> This results in a lot of extra replication work on the cluster, as we
> replicate the block and then end up with multiple excess replicas which are
> very quickly deleted.
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