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https://issues.apache.org/jira/browse/HBASE-15702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255945#comment-15255945
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Hiroshi Ikeda commented on HBASE-15702:
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Sorry, ConnectionManager was removed in the master branch, but the issue still
remains in ConnectionImplementation.
> Improve PerClientRandomNonceGenerator
> -------------------------------------
>
> Key: HBASE-15702
> URL: https://issues.apache.org/jira/browse/HBASE-15702
> Project: HBase
> Issue Type: Improvement
> Reporter: Hiroshi Ikeda
> Priority: Trivial
>
> PerClientRandomNonceGenerator can be exposed to all the threads via the
> static field ConnectionManager.nonceGenerator, but
> PerClientRandomNonceGenerator uses Random, which should be ThreadLocalRandom
> or something. (See javadoc of Random.)
> Moreover, ConnectionManager creates or refers the singleton instance of
> PerClientThreadLocalRandom with a lock or volatile, but it should be created
> as a static final field in PerClientThreadLocalRandom itself, and the
> creation will be postponed until the field is actually refereed and the class
> is being initialized.
> The same can be said for ConnectionManager.NoNonceGenerator.
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