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Posted to dev@avro.apache.org by "Daniel Kulp (JIRA)" <ji...@apache.org> on 2017/07/17 19:09:00 UTC

[jira] [Created] (AVRO-2051) Thread contention accessing JsonProperties props

Daniel Kulp created AVRO-2051:
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             Summary: Thread contention accessing JsonProperties props
                 Key: AVRO-2051
                 URL: https://issues.apache.org/jira/browse/AVRO-2051
             Project: Avro
          Issue Type: Bug
          Components: java
    Affects Versions: 1.8.2
            Reporter: Daniel Kulp


See https://lists.apache.org/thread.html/dd34ab8439137a81a9de29ad4161f37b17638394cea0806765689976@%3Cuser.avro.apache.org%3E

Basically, the getJsonProp method, being synchronized, is causing thread contention issues when trying to share schemas between threads.    My proposal (pull request forthcoming) is to treat "props" as an immutable map and do a copy+add+swap for the addProp method.   This will make the addProp call slower (particularly for large maps of props), but would make the reads significantly faster as no locking will be needed.



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