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https://issues.apache.org/jira/browse/HDFS-15975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17346042#comment-17346042
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Wei-Chiu Chuang edited comment on HDFS-15975 at 5/17/21, 10:06 AM:
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Fortunately HBase accesses the hedged read metrics through the public API, not
the public member variables, so this is fine for HBase. Otherwise it could
throw NoSuchFieldError
Not sure about other applications.
was (Author: jojochuang):
Fortunately HBase accesses the hedged read metrics through the public API, not
the public member variables, so this is fine for HBase.
Not sure about other applications.
> Use LongAdder instead of AtomicLong
> -----------------------------------
>
> Key: HDFS-15975
> URL: https://issues.apache.org/jira/browse/HDFS-15975
> Project: Hadoop HDFS
> Issue Type: Wish
> Reporter: tomscut
> Assignee: tomscut
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.3.1, 3.4.0
>
> Time Spent: 6h 10m
> Remaining Estimate: 0h
>
> When counting some indicators, we can use LongAdder instead of AtomicLong to
> improve performance. The long value is not an atomic snapshot in LongAdder,
> but I think we can tolerate that.
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