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https://issues.apache.org/jira/browse/HIVE-20043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Laszlo Bodor updated HIVE-20043:
--------------------------------
    Attachment: HIVE-20043.01.patch

> HiveServer2: SessionState has a static sync block around an AtomicBoolean
> -------------------------------------------------------------------------
>
>                 Key: HIVE-20043
>                 URL: https://issues.apache.org/jira/browse/HIVE-20043
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 3.0.0
>            Reporter: Gopal V
>            Assignee: Laszlo Bodor
>            Priority: Major
>              Labels: Concurrency
>         Attachments: HIVE-20043.01.patch
>
>
> {code}
>   private static void start(SessionState startSs, boolean isAsync, LogHelper 
> console) {
> ...
>     synchronized(SessionState.class) {
>       if (!startSs.isStarted.compareAndSet(false, true)) {
>         return;
>       }
>     }
> {code}
> startSs.isStarted is an AtomicBoolean, which makes it hard to know why this 
> code is locked with a static lock.



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