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https://issues.apache.org/jira/browse/SLING-1972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Felix Meschberger closed SLING-1972.
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Close after release
> JavaScript ScriptEngine is not thread safe
> ------------------------------------------
>
> Key: SLING-1972
> URL: https://issues.apache.org/jira/browse/SLING-1972
> Project: Sling
> Issue Type: Bug
> Components: Scripting
> Affects Versions: Scripting JavaScript 2.0.10
> Reporter: Felix Meschberger
> Assignee: Felix Meschberger
> Priority: Critical
> Fix For: Scripting JavaScript 2.0.12
>
>
> The JavaScriptScriptEngine has a concurrency issue in that it keeps the
> top-level scope of the script executed as an instance field. Since the
> servlet resolver is caching SlingScript instances and the SlingScript has a
> reference to the ScriptEngine (JavaScriptScriptEngine in this case) executing
> the same script concurrently causes them all to use the same top-level scope
> and thus to share variables .....
> The fix is to remove the "scope" field because this is not really: The top
> level scope is maintained the by Rhino Context object which is used to
> execute the script and which manages the top level scope in a thread safe way.
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