ClassCastException at Empty Table Switch in a Streamed Wrapped Metanode

Dear KNIME team,

I am experiencing an issue with simple streaming. In the attached workflow, the streamed metanode fails with "(ClassCastException): org.knime.core.node.port.inactive.InactiveBranchPortObject cannot be cast to org.knime.core.node.BufferedDataTable".

When changing the wrapped metanode's Job Manager from Simple Streaming to default, the node works just fine.

I'm using KNIME 3.2.1.

Best regards


Hi Arbe,

thank your for reporting this!

This seems to be a bug in the streaming executor. Please note that the Streaming Execution is still in a beta mode and we are also heavily testing it ourselves. It is on the roadmap for the next major release to add quite some improvements to this extension.

Best regards, Iris


PS: I will keep you updated as soon as there is any progress