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https://issues.apache.org/jira/browse/HDFS-17477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Danny Becker reassigned HDFS-17477:
-----------------------------------
Assignee: Danny Becker
> IncrementalBlockReport race condition additional edge cases
> -----------------------------------------------------------
>
> Key: HDFS-17477
> URL: https://issues.apache.org/jira/browse/HDFS-17477
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: auto-failover, ha, namenode
> Affects Versions: 3.3.5, 3.3.4, 3.3.6
> Reporter: Danny Becker
> Assignee: Danny Becker
> Priority: Major
>
> HDFS-17453 fixes a race condition between IncrementalBlockReports (IBR) and
> the Edit Log Tailer which can cause the Standby NameNode (SNN) to incorrectly
> mark blocks as corrupt when it transitions to Active. There are a few edge
> cases that HDFS-17453 does not cover.
> For Example:
> 1. SNN1 loads the edits for b1gs1 and b1gs2.
> 2. DN1 reports b1gs1 to SNN1, so it gets queued for later processing.
> 3. DN1 reports b1gs2 to SNN1 so it gets added to the blocks map.
> 4. SNN1 transitions to Active (ANN1).
> 5. ANN1 processes the pending DN message queue and marks DN1->b1gs1 as
> corrupt because it was still in the queue.
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