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https://issues.apache.org/jira/browse/SLING-7241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16254980#comment-16254980
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Björn Csott commented on SLING-7241:
------------------------------------
[~npeltier], I was debugging several solutions. Using the PlumberServlet via
curl always works. So I started to investigate whats the difference. I added
the <Bundle-RequiredExecutionEnvironenment> which was the only missing piece in
my bundle.
The result of my investigation was:
* Copy of Plumber Servlet in my Bundle -> does not work
* Plumber in Service called from Servlet -> does not work
* Plumber in Service executed via JMX -> works
* Plumber in Servlet ->does not work
No difference on Mac or Windows. Also tried several JVM versions. No difference.
The only stable solution I found (besides adding Nashorn to system bundle) is
using the other constructor. I think
https://issues.apache.org/jira/browse/SLING-7134?focusedCommentId=16187822&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16187822
describes also this strange behavior.
> [pipes] Nashorn ScriptEngine in PipeBindings is null
> ----------------------------------------------------
>
> Key: SLING-7241
> URL: https://issues.apache.org/jira/browse/SLING-7241
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Affects Versions: Pipes 1.0.4
> Environment: java.runtime.name = Java(TM) SE Runtime Environment
> java.runtime.version = 1.8.0_144-b01
> Reporter: Björn Csott
> Priority: Minor
> Attachments: error.log
>
>
> Under some unclear circumstances the ScriptEngine in PipeBindings does not
> get initialized.
> There is a solution out there to attach Nashorn to the system bundle. Appart
> from that I was able to fix it by using a different constructor:
> ScriptEngineManager(null).
> The issue can be reproduced by deploying
> https://github.com/bcsott/migration-tool
> When it fails the following is written to stderror.log:
> ScriptEngineManager providers.next(): javax.script.ScriptEngineFactory:
> Provider jdk.nashorn.api.scripting.NashornScriptEngineFactory not found
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