[jira] [Commented] (JENA-1953) EnvJavaScript is supposed to be a singleton. However EnvJavaScript.get may return multiple instances

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186675#comment-17186675 ] 

ASF subversion and git services commented on JENA-1953:
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Commit 5c96e846a25a2386de5590ffdee3db4cb8494de0 in jena's branch refs/heads/master from Andy Seaborne
[ https://gitbox.apache.org/repos/asf?p=jena.git;h=5c96e84 ]

Merge pull request #788 from strangepleasures/JENA-1953

JENA-1953 Prevent EnvJavaScript.get from returning multiple instances

> EnvJavaScript is supposed to be a singleton. However EnvJavaScript.get may return multiple instances
> ----------------------------------------------------------------------------------------------------
>
>                 Key: JENA-1953
>                 URL: https://issues.apache.org/jira/browse/JENA-1953
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>            Reporter: Pavel Mikhailovskii
>            Assignee: Andy Seaborne
>            Priority: Minor
>             Fix For: Jena 3.17.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> EnvJavaScript is supposed to be a lazily-initialized singleton but the implementation is broken.  It uses a non-volatile static field which is not lock-guarded when read. As a result , EnvJavaScript.get may instantiate multiple instances.



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