[Bug][Prism]: panic: unsupported StateKey Get type: *fnexecution_v1.StateKey_MultimapKeysSideInput_

[damondouglas]

Java test org.apache.beam.sdk.transforms.ViewTest fails on Prism with error panic: unsupported StateKey Get type: *fnexecution_v1.StateKey_MultimapKeysSideInput_:

Full error:

panic: unsupported StateKey Get type: *fnexecution_v1.StateKey_MultimapKeysSideInput_: multimap_keys_side_input:  {
  transform_id:  "OutputSideInputs-ParMultiDo-Anonymous-"
  side_input_id:  "org.apache.beam.sdk.values.PCollectionViews$SimplePCollectionView.<init>:1443#bbafda9391edc490"
}

Steps to reproduce.

1. Run Prism server.

./gradlew :runners:prism:runServer

2. Execute :runners:portability:java:ulrLoopbackValidatesRunnerTests on Prism:

TEST=org.apache.beam.sdk.transforms.ViewTest
./gradlew :runners:portability:java:ulrLoopbackValidatesRunnerTests -PjobEndpoint=localhost:8073 --tests="$TEST"

Parent tracker: #28187