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https://issues.apache.org/jira/browse/HDFS-2691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13191790#comment-13191790
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Aaron T. Myers commented on HDFS-2691:
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bq. I tend to think of ERROR as things like dataloss/corruption. So I left it
as warn, but added an assert here so that it will fail if we come across this
during development or QA where assertions are often enabled.
Makes sense to me.
bq. Changed all to ERROR
Great, thanks.
bq. I think we should file a follow-up JIRA to do the rename to something like
IncrementalBlockInfo.
Makes sense.
+1, the latest patch looks good to me.
> HA: Tests and fixes for pipeline targets and replica recovery
> -------------------------------------------------------------
>
> Key: HDFS-2691
> URL: https://issues.apache.org/jira/browse/HDFS-2691
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Attachments: hdfs-2691.txt, hdfs-2691.txt, hdfs-2691.txt
>
>
> Currently there are some TODOs around pipeline/recovery code in the HA
> branch. For example, commitBlockSynchronization only gets sent to the active
> NN which may have failed over by that point. So, we need to write some tests
> here and figure out what the correct behavior is.
> Another related area is the treatment of targets in the pipeline. When a
> pipeline is created, the active NN adds the "expected locations" to the
> BlockInfoUnderConstruction, but the DN identifiers aren't logged with the
> OP_ADD. So after a failover, the BlockInfoUnderConstruction will have no
> targets and I imagine replica recovery would probably trigger some issues.
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