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From "Heng Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15702) Improve PerClientRandomNonceGenerator
Date Mon, 25 Apr 2016 06:59:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15255982#comment-15255982
] 

Heng Chen commented on HBASE-15702:
-----------------------------------

You are right, [~ikeda].   Singleton instance inside PerClientRandomNonceGenerator lazy initalized
should be better.  

> 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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