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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-2051) Thread contention accessing JsonProperties props
Date Fri, 08 Sep 2017 19:07:00 GMT

    [ https://issues.apache.org/jira/browse/AVRO-2051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16159134#comment-16159134
] 

ASF GitHub Bot commented on AVRO-2051:
--------------------------------------

Github user dkulp closed the pull request at:

    https://github.com/apache/avro/pull/236


> 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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