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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-20043) HiveServer2: SessionState has a static sync block around an AtomicBoolean
Date Sun, 01 Jul 2018 06:00:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V updated HIVE-20043:
---------------------------
    Labels: Concurrency  (was: )

> 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
>            Priority: Major
>              Labels: Concurrency
>
> {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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