java.lang.RuntimeException: Failed to create stage bundle factory!java.lang.RuntimeException: Failed to create stage bundle factory! at org.apache.flink.streaming.api.runners.python.beam.BeamPythonFunctionRunner.createStageBundleFactory(BeamPythonFunctionRunner.java:415) ~[?:?] at org.apache.flink.streaming.api.runners.python.beam.BeamPythonFunctionRunner.open(BeamPythonFunctionRunner.java:259) ~[?:?] at org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator.open(AbstractPythonFunctionOperator.java:113) ~[?:?] at org.apache.flink.table.runtime.operators.python.AbstractStatelessFunctionOperator.open(AbstractStatelessFunctionOperator.java:116) ~[?:?] at org.apache.flink.table.runtime.operators.python.aggregate.arrow.AbstractArrowPythonAggregateFunctionOperator.open(AbstractArrowPythonAggregateFunctionOperator.java:90) ~[?:?] at org.apache.flink.table.runtime.operators.python.aggregate.arrow.stream.StreamArrowPythonGroupWindowAggregateFunctionOperator.open(StreamArrowPythonGroupWindowAggregateFunctionOperator.java:180) ~[?:?] at org.apache.flink.streaming.runtime.tasks.OperatorChain.initializeStateAndOpenOperators(OperatorChain.java:426) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$2(StreamTask.java:535) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:525) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:565) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_281] Suppressed: java.lang.NullPointerException at org.apache.flink.table.runtime.operators.python.aggregate.arrow.AbstractArrowPythonAggregateFunctionOperator.dispose(AbstractArrowPythonAggregateFunctionOperator.java:105) ~[?:?] at org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:783) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:762) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:681) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:585) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570) ~[flink-dist_2.12-1.12.1.jar:1.12.1] at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_281]