SplittableDoFnTest.testBundleFinalizationOccursOnBoundedSplittableDoFn SDK initiated SDF checkpoints

java.lang.RuntimeException: SDK initiated SDF checkpoints are unsupported within batch DataflowSDK initiated SDF checkpoints are unsupported within batch DataflowSDK initiated SDF checkpoints are unsupported within batch DataflowSDK initiated SDF checkpoints are unsupported within batch DataflowWorkflow failed. Causes: S06:s4/ProcessElementAndRestrictionWithSizing+PAssert$19/GroupGlobally/Reify.Window/ParDo(Anonymous)+PAssert$19/GroupGlobally/ParDo(ToSingletonIterables)+PAssert$19/GroupGlobally/WithKeys/AddKeys/Map+PAssert$19/GroupGlobally/GroupByKey/Write failed., The job failed because a work item has failed 4 times. Look in previous log entries for the cause of each one of the 4 failures. For more information, see https://cloud.google.com/dataflow/docs/guides/common-errors. The work item was attempted on these workers:   splittabledofntest0testbu-10280032-b1jz-harness-gkvf      Root cause: SDK initiated SDF checkpoints are unsupported within batch Dataflow,  splittabledofntest0testbu-10280032-b1jz-harness-gkvf      Root cause: SDK initiated SDF checkpoints are unsupported within batch Dataflow,  splittabledofntest0testbu-10280032-b1jz-harness-gkvf      Root cause: SDK initiated SDF checkpoints are unsupported within batch Dataflow,  splittabledofntest0testbu-10280032-b1jz-harness-gkvf      Root cause: SDK initiated SDF checkpoints are unsupported within batch Dataflow