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https://issues.apache.org/jira/browse/STREAMPIPES-390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17371292#comment-17371292
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Philipp Zehnder commented on STREAMPIPES-390:
---------------------------------------------
Hi [~wiener],
thanks for the response. I tried your suggestion and selected the other option
for the Authentication configuration.
I even tried to set a user name and password, but even with those values I got
the same error.
Which version did you use for your test?
> Pipeline with MQTT sink does not start
> --------------------------------------
>
> Key: STREAMPIPES-390
> URL: https://issues.apache.org/jira/browse/STREAMPIPES-390
> Project: StreamPipes
> Issue Type: Bug
> Components: Pipeline Elements
> Reporter: Philipp Zehnder
> Priority: Blocker
> Fix For: 0.68.0
>
>
> I created a pipeline with the 'Machine Data Simulator' as a source and MQTT
> publisher as a sink.
> When storing the pipeline the UI shows the following error: "Your pipeline
> could not be stored."
> It seems to be a problem with the secret static property. I also tried to set
> the values for the basic auth, but the error was the same.
> In the backend this exception occurs:
> backend_1 | 09:58:30.390 SP [http-nio-8030-exec-1] ERROR
> o.a.c.c.C.[.[.[.[.a.s.b.StreamPipesResourceConfig] - Servlet.service() for
> servlet [org.apache.streampipes.backend.StreamPipesResourceConfig] in context
> with path [/streampipes-backend] threw exception
> [java.lang.NullPointerException] with root cause
> backend_1 | java.lang.NullPointerException: null
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretVisitor.visit(SecretVisitor.java:99)
> backend_1 | at
> org.apache.streampipes.model.staticproperty.StaticPropertyAlternative.accept(StaticPropertyAlternative.java:79)
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretVisitor.lambda$visit$1(SecretVisitor.java:106)
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretVisitor$$Lambda$1232/0x00000000fc026e20.accept(Unknown
> Source)
> backend_1 | at java.util.ArrayList.forEach(ArrayList.java:1259)
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretVisitor.visit(SecretVisitor.java:106)
> backend_1 | at
> org.apache.streampipes.model.staticproperty.StaticPropertyAlternatives.accept(StaticPropertyAlternatives.java:69)
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretService.lambda$applyConfig$0(SecretService.java:49)
> backend_1 | at
> org.apache.streampipes.manager.secret.SecretService$$Lambda$537/0x000000003c147450.accept(Unknown
> Source)
> b
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