[jira] [Created] (ARROW-10287) [C++] Avoid std::random_device whenever possible

["Antoine Pitrou (Jira)" <ji...@apache.org>]

Antoine Pitrou created ARROW-10287:
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             Summary: [C++] Avoid std::random_device whenever possible
                 Key: ARROW-10287
                 URL: https://issues.apache.org/jira/browse/ARROW-10287
             Project: Apache Arrow
          Issue Type: Wish
          Components: C++
            Reporter: Antoine Pitrou
            Assignee: Antoine Pitrou


I just tried running the tests on a default build on Ubuntu 20.04 with an AMD Ryzen CPU (where presumably RDRAND can't be relied on, but I don't know if that's the underlying reason), and the tests appear to hand blocking on {{std::random_device}} at some point. I suppose some versions of libstdc++ will use {{/dev/random}} instead of {{/dev/urandom}} (which is a bad idea in itself).

We should probably try to minimize our usage of {{std::random_device}}. After all, we're not generating cryptographic keys or anything.



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