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Posted to dev@flink.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2018/03/26 22:29:00 UTC
[jira] [Created] (FLINK-9090) Replace UUID.randomUUID with
deterministic PRNG
Ted Yu created FLINK-9090:
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Summary: Replace UUID.randomUUID with deterministic PRNG
Key: FLINK-9090
URL: https://issues.apache.org/jira/browse/FLINK-9090
Project: Flink
Issue Type: Improvement
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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