RPC channel is closed

KNIME Analytics Platform
1

I am working with Google Cloud Platform and using livy to connect to GCP. However, when I am executing my workflow after a certain time the nodes stop working with the following error:
WARN SparkDataPreviewPanel Error during fetching data from Spark, reason: org.knime.bigdata.spark.core.exception.KNIMESparkException: Server Error: “java.lang.IllegalStateException: RPC channel is closed.” (LivyHttpException)

I understand that the error is for a connection timeout. But I do not understand what changes should be made in order to rectify it.

Could someone please help me out with this?

2

Hi,
Googleing the error yields results like this:

This leads me to the assumption that it is something on the backend, which makes sense, since it’s the backend that closes the channel unexpectedly.
Kind regards
Alexander

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