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https://issues.apache.org/jira/browse/HDFS-2691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-2691:
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Attachment: hdfs-2691.txt
Here's some tests around pipeline treatment during failover.
The third test case here is currently failing due to the fact that pipeline
targets are not persisted in the edit log, nor are the blocks reported if the
file is still open. We need to figure out a strategy to fix this...
> 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
>
>
> 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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