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https://issues.apache.org/jira/browse/HDFS-17416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17829447#comment-17829447
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ASF GitHub Bot commented on HDFS-17416:
---------------------------------------
ZanderXu commented on code in PR #6647:
URL: https://github.com/apache/hadoop/pull/6647#discussion_r1533487337
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java:
##########
@@ -2150,7 +2155,7 @@ int computeReconstructionWorkForBlocks(
}
}
} finally {
- namesystem.writeUnlock("computeReconstructionWorkForBlocks");
+ namesystem.writeUnlock(FSNamesystemLockMode.GLOBAL,
"computeReconstructionWorkForBlocks");
Review Comment:
`bc.getName()` and `bc.getStoragePolicyID()` need FSReadLock while
initializing `BlockReconstructionWork`
> [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
> Labels: pull-request-available
>
> 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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