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https://issues.apache.org/jira/browse/HDFS-17416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17829365#comment-17829365
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ASF GitHub Bot commented on HDFS-17416:
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ZanderXu opened a new pull request, #6647:
URL: https://github.com/apache/hadoop/pull/6647
Threads in BlockManager.class support fine-grained lock.
- BlockReportProcessingThread
- MarkedDeleteBlockScrubber
- RedundancyMonitor
- Reconstruction Queue Initializer
Normally, these threads just need BMReadLock or BMWriteLock, but there are
some cases still need FSReadLock and FSWriteLock.
- UpdateQuota while completing one block
- GetStoragePolicyId while removing excess replicas
- GetFullPath while checking if it is snapshot
> [FGL] Monitor threads in BlockManager.class support fine-grained lock
> ---------------------------------------------------------------------
>
> Key: HDFS-17416
> URL: https://issues.apache.org/jira/browse/HDFS-17416
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
>
> There are some monitor threads in BlockManager.class.
>
> This ticket is used to make these threads supporting fine-grained locking.
> * BlockReportProcessingThread
> * MarkedDeleteBlockScrubber
> * RedundancyMonitor
> * Reconstruction Queue Initializer
>
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