JavaScript ScriptEngine is not thread safe
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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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