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https://issues.apache.org/jira/browse/NIFI-8730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Burgess updated NIFI-8730:
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Summary: Invalidate instead of evaluating empty script in scripted
components (was: ECMAScript engine throws NPE when script is empty)
> Invalidate instead of evaluating empty script in scripted components
> --------------------------------------------------------------------
>
> Key: NIFI-8730
> URL: https://issues.apache.org/jira/browse/NIFI-8730
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Reporter: Matt Burgess
> Assignee: Matt Burgess
> Priority: Major
>
> As of NIFI-8625, script engines that aren't Invocable are filtered out from
> the list of available engines to choose for most scripting components (except
> for ExecuteScript and ScriptedTransformRecord at the time of this writing) as
> all other scripting components require an Invocable script engine. However
> this causes ECMAScript to be the default engine, and it throws a
> NullPointerException when the script body is empty (which it is when the
> processor is first created).
> Rather than make a different engine be the default (which could be done under
> a different Jira), it is better to not try to create the ScriptRunner and/or
> evaluate the script if the body is empty.
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