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Posted to issues@kylin.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2018/03/26 23:46:00 UTC

[jira] [Created] (KYLIN-3317) Replace UUID.randomUUID with deterministic PRNG

Ted Yu created KYLIN-3317:
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             Summary: Replace UUID.randomUUID with deterministic PRNG
                 Key: KYLIN-3317
                 URL: https://issues.apache.org/jira/browse/KYLIN-3317
             Project: Kylin
          Issue Type: Task
            Reporter: Ted Yu


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



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