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From "Mike Drob (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19164) Avoid UUID.randomUUID in tests
Date Fri, 12 Jan 2018 20:47:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16324537#comment-16324537
] 

Mike Drob commented on HBASE-19164:
-----------------------------------

Attempted to rerun the precommit, patch probably needs a rebase...

> Avoid UUID.randomUUID in tests
> ------------------------------
>
>                 Key: HBASE-19164
>                 URL: https://issues.apache.org/jira/browse/HBASE-19164
>             Project: HBase
>          Issue Type: Improvement
>          Components: test
>            Reporter: Mike Drob
>            Assignee: Sahil Aggarwal
>              Labels: beginner
>         Attachments: HBASE-19164.master.001.patch, HBASE-19164.master.002.patch, HBASE-19164.master.003.patch
>
>
> We have a lot of places in our test code where we use {{UUID.randomUUID}} to generate
table names or paths for uniqueness. Unfortunately, this uses up a good chunk of system entropy,
since Sun chose that random UUID's should use the NativePRNGBlocking implementation.
> We don't need to block on entropy for random bits to pick a random table name in a test,
so we can use something that doesn't strain the system too much - secure random can be a source
of problems on some VM or containers.



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