Failure when getting watermark "getWatermark is never meant to be invoked."

generic::unknown: org.apache.beam.sdk.util.UserCodeException: java.lang.UnsupportedOperationException: getWatermark is never meant to be invoked. at org.apache.beam.sdk.util.UserCodeException.wrap(UserCodeException.java:36) at org.apache.beam.sdk.io.Read$UnboundedSourceAsSDFWrapperFn$DoFnInvoker.invokeProcessElement(Unknown Source) at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForElementAndRestriction(FnApiDoFnRunner.java:838) at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForSizedElementAndRestriction(FnApiDoFnRunner.java:808) at org.apache.beam.fn.harness.FnApiDoFnRunner.access$200(FnApiDoFnRunner.java:132) at org.apache.beam.fn.harness.FnApiDoFnRunner$Factory$2.accept(FnApiDoFnRunner.java:226) at org.apache.beam.fn.harness.FnApiDoFnRunner$Factory$2.accept(FnApiDoFnRunner.java:223) at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:216) at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:179) at org.apache.beam.fn.harness.BeamFnDataReadRunner.forwardElementToConsumer(BeamFnDataReadRunner.java:204) at org.apache.beam.fn.harness.data.QueueingBeamFnDataClient.drainAndBlock(QueueingBeamFnDataClient.java:106) at org.apache.beam.fn.harness.control.ProcessBundleHandler.processBundle(ProcessBundleHandler.java:295) at org.apache.beam.fn.harness.control.BeamFnControlClient.delegateOnInstructionRequestType(BeamFnControlClient.java:173) at org.apache.beam.fn.harness.control.BeamFnControlClient.lambda$processInstructionRequests$0(BeamFnControlClient.java:157) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

Seems to be a breakage in SDF due to a recent change.