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https://issues.apache.org/jira/browse/HDFS-16931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17692196#comment-17692196
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ASF GitHub Bot commented on HDFS-16931:
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liuaer opened a new pull request, #5424:
URL: https://github.com/apache/hadoop/pull/5424
In our HDFS cluster that holds hundreds of millions of metadata, all of
which is EC data. When Observer NN replays the OP_DELETE operation which
deletes a large directory, involving tens of millions of metadata. Because the
operation is synchronous, the Observer NN is stuck for nearly 50 minutes.
[HDFS-16043](https://issues.apache.org/jira/browse/HDFS-16043) has solved the
asynchronous deletion on the active NN. This is to solve the asynchronous
deletion on the Observer NN.
> Observer nn delete blocks asynchronously when tail OP_DELETE editlog
> --------------------------------------------------------------------
>
> Key: HDFS-16931
> URL: https://issues.apache.org/jira/browse/HDFS-16931
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: kinit
> Priority: Minor
>
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