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https://issues.apache.org/jira/browse/HDFS-7675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294231#comment-14294231
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Konstantin Shvachko commented on HDFS-7675:
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Sounds like you don't need the reference to {{SpanReceiverHost}} in
{{DFSClient}}, but you still need to initializes
{{SpanReceiverHost#SingletonHolder#INSTANCE}}. May be a static method, which
initializes the INSTANCE directly, can be introduced rather than using
{{getInstance()}} for {{DFSClient}}?
> Unused member DFSClient.spanReceiverHost
> ----------------------------------------
>
> Key: HDFS-7675
> URL: https://issues.apache.org/jira/browse/HDFS-7675
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: dfsclient
> Affects Versions: 3.0.0
> Reporter: Konstantin Shvachko
>
> DFSClient.spanReceiverHost is initialised but never used. Could be redundant.
> This was introduced by HDFS-7055.
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