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https://issues.apache.org/jira/browse/HDFS-16737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17582999#comment-17582999
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ASF GitHub Bot commented on HDFS-16737:
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ZanderXu opened a new pull request, #4784:
URL: https://github.com/apache/hadoop/pull/4784
### Description of PR
The number of threads in FsDatasetAsyncDiskService#addExecutorForVolume is
elastic right now, make it fixed.
Presently the corePoolSize is set to 1 and maximumPoolSize is set to
maxNumThreadsPerVolume, but since the size of Queue is Integer.MAX, the queue
doesn't tend to get full and threads are always confined to 1 irrespective of
maxNumThreadsPerVolume.
> Fix number of threads in FsDatasetAsyncDiskService#addExecutorForVolume
> -----------------------------------------------------------------------
>
> Key: HDFS-16737
> URL: https://issues.apache.org/jira/browse/HDFS-16737
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
>
> The number of threads in FsDatasetAsyncDiskService#addExecutorForVolume is
> elastic right now, make it fixed.
> Presently the corePoolSize is set to 1 and maximumPoolSize is set to
> maxNumThreadsPerVolume, but since the size of Queue is Integer.MAX, the queue
> doesn't tend to get full and threads are always confined to 1 irrespective of
> maxNumThreadsPerVolume.
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