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https://issues.apache.org/jira/browse/HDFS-15627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17223509#comment-17223509
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Xiaoqiao He commented on HDFS-15627:
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commit this to branch-3.2.2 and verify it clean.
> Audit log deletes before collecting blocks
> ------------------------------------------
>
> Key: HDFS-15627
> URL: https://issues.apache.org/jira/browse/HDFS-15627
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: logging, namenode
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Fix For: 3.2.2, 3.3.1, 3.4.0, 3.1.5, 3.2.3
>
> Attachments: HDFS-15627.001.patch
>
>
> Deletes currently collect blocks in the write lock, write the edit,
> incrementally block delete, finally +audit log+. It should be collect blocks,
> edit log, +audit log+, incremental delete. Once the edit is durable it's
> consistent to audit log the delete. There is no sense in deferring the audit
> into the indeterminate future.
> The problem occurs when thereto server hung due to large deletes but it won't
> be easy to identify the problem. That should have been easily identified as
> the first delete logged after the hang.
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