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Posted to issues@kudu.apache.org by "Adar Dembo (JIRA)" <ji...@apache.org> on 2016/09/16 22:03:20 UTC

[jira] [Created] (KUDU-1624) Possible data races in util/trace

Adar Dembo created KUDU-1624:
--------------------------------

             Summary: Possible data races in util/trace
                 Key: KUDU-1624
                 URL: https://issues.apache.org/jira/browse/KUDU-1624
             Project: Kudu
          Issue Type: Bug
          Components: util
    Affects Versions: 1.0.0
            Reporter: Adar Dembo
         Attachments: rpc_stub-test.txt

I'm running clang 3.9 against a Kudu source tree using libcpp, so it's possible this is partly due to differences in how libstdc++ implements std::vector. Or maybe it's real.

At first glance, it looks like the problem is that Trace::MetricsToJSON(JsonWriter*) doesn't hold lock_ while accessing child_traces_. It would need to some refactoring to avoid taking lock_ recursively, though, since it's a recursive function.



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