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https://issues.apache.org/jira/browse/HDFS-16432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17479811#comment-17479811
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qinyuren edited comment on HDFS-16432 at 1/25/22, 6:29 AM:
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[~hexiaoqiao], [~tasanuma] Please take a look.
was (Author: qinyuren):
[~hexiaoqiao] [~tasanuma] Please take a look.
> 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: image-2022-01-20-15-19-28-384.png
>
> Time Spent: 40m
> 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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