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https://issues.apache.org/jira/browse/KYLIN-3317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16577896#comment-16577896
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ASF GitHub Bot commented on KYLIN-3317:
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tttMelody opened a new pull request #197: KYLIN-3317, replace UUID.randomUUID
with new UUID(ThreadLocalRandom.current().nextLong(),
ThreadLocalRandom.current().nextLong())
URL: https://github.com/apache/kylin/pull/197
…urrent().nextLong(), ThreadLocalRandom.current().nextLong()).
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> Replace UUID.randomUUID with deterministic PRNG
> -----------------------------------------------
>
> Key: KYLIN-3317
> URL: https://issues.apache.org/jira/browse/KYLIN-3317
> Project: Kylin
> Issue Type: Task
> Components: Security
> Reporter: Ted Yu
> Assignee: jiatao.tao
> Priority: Major
> Fix For: v2.5.0
>
>
> Currently UUID.randomUUID is called in various places in the code base.
> * It is non-deterministic.
> * It uses a single secure random for UUID generation. This uses a single JVM
> wide lock, and this can lead to lock contention and other performance
> problems.
> We should move to something that is deterministic by using seeded PRNGs
> {code}
> new UUID(ThreadLocalRandom.current().nextLong(),
> ThreadLocalRandom.current().nextLong())
> {code}
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