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https://issues.apache.org/jira/browse/HDFS-16622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18037301#comment-18037301
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ASF GitHub Bot commented on HDFS-16622:
---------------------------------------
github-actions[bot] commented on PR #4407:
URL: https://github.com/apache/hadoop/pull/4407#issuecomment-3514459693
We're closing this stale PR because it has been open for 100 days with no
activity. This isn't a judgement on the merit of the PR in any way. It's just a
way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working
on it, please feel free to re-open it and ask for a committer to remove the
stale tag and review again.
Thanks all for your contribution.
> addRDBI in IncrementalBlockReportManager may remove the block with bigger GS.
> -----------------------------------------------------------------------------
>
> Key: HDFS-16622
> URL: https://issues.apache.org/jira/browse/HDFS-16622
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> In our production environment, there is a strange missing block, according
> to the log, I suspect there is a bug in function
> addRDBI(ReceivedDeletedBlockInfo rdbi,DatanodeStorage storage)(line 250).
> Bug code in the for loop:
> {code:java}
> synchronized void addRDBI(ReceivedDeletedBlockInfo rdbi,
> DatanodeStorage storage) {
> // Make sure another entry for the same block is first removed.
> // There may only be one such entry.
> for (PerStorageIBR perStorage : pendingIBRs.values()) {
> if (perStorage.remove(rdbi.getBlock()) != null) {
> break;
> }
> }
> getPerStorageIBR(storage).put(rdbi);
> }
> {code}
> Removed the GS of the Block in ReceivedDeletedBlockInfo may be greater than
> the GS of the Block in rdbi. And NN will invalidate the Replicate will small
> GS when complete one block.
> So If there is only one replicate for one block, there is a possibility of
> missingblock because of this wrong logic.
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