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https://issues.apache.org/jira/browse/HDFS-16432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17643702#comment-17643702
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Yanlei Yu commented on HDFS-16432:
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hi [~qinyuren] , Similar to this
[HDFS-14657|https://issues.apache.org/jira/browse/HDFS-14657], both control the
lock time. You directly control the time, while HDFS-14657 controls the lock
time by setting the number of blocks
> Namenode block report add yield to avoid holding write lock too long
> --------------------------------------------------------------------
>
> Key: HDFS-16432
> URL: https://issues.apache.org/jira/browse/HDFS-16432
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: qinyuren
> Priority: Major
> Labels: pull-request-available
> Attachments: 20220209-120613.html, image-2022-01-20-15-19-28-384.png
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> !image-2022-01-20-15-19-28-384.png|width=683,height=132!
> In our cluster, namenode block report will held write lock for a long time if
> the storage block number more than 100000. So we want to add a yield
> mechanism in block reporting process to avoid holding write lock too long.
> # Ensure that the processing of the same block is in the same write lock.
> # Because StorageInfo.addBlock will moves the block to the head of
> blockList, so we can collect blocks that have not been reported by delimiter
> block.
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