Hi, I'm running into errors when trying to run a Flink streaming program.
Running the WordCount example <https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/python.html#streaming-program-example> from the docs fails with this error: java.lang.VerifyError: (class: site$py, method: _Helper$26 signature: (Lorg/python/core/PyFrame;Lorg/python/core/ThreadState;)Lorg/python/core/PyObject;) Incompatible argument to function at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) at java.lang.Class.getConstructor0(Class.java:3075) at java.lang.Class.getConstructor(Class.java:1825) at org.python.core.BytecodeLoader.makeCode(BytecodeLoader.java:70) at org.python.core.util.importer.getModuleCode(importer.java:217) at org.python.core.util.importer.importer_load_module(importer.java:95) at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:163) at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer.__call__(Unknown Source) at org.python.core.PyBuiltinMethodNarrow.__call__(PyBuiltinMethodNarrow.java:46) at org.python.core.imp.loadFromLoader(imp.java:587) at org.python.core.imp.find_module(imp.java:537) at org.python.core.imp.import_next(imp.java:840) at org.python.core.imp.import_first(imp.java:861) at org.python.core.imp.load(imp.java:716) at org.python.core.Py.importSiteIfSelected(Py.java:1558) at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:116) at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:94) at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:71) at org.apache.flink.streaming.python.util.InterpreterUtils.initPythonInterpreter(InterpreterUtils.java:122) at org.apache.flink.streaming.python.util.InterpreterUtils.deserializeFunction(InterpreterUtils.java:73) at org.apache.flink.streaming.python.api.functions.AbstractPythonUDF.open(AbstractPythonUDF.java:51) at org.apache.flink.streaming.python.api.functions.PythonFlatMapFunction.open(PythonFlatMapFunction.java:51) at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36) at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:102) at org.apache.flink.streaming.api.operators.StreamFlatMap.open(StreamFlatMap.java:43) at org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:424) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:290) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711) at java.lang.Thread.run(Thread.java:748) The only job I can get to run is one that reads from a KafkaConsumer010 and outputs the result without applying any operations (if there is a Filter, Map, etc. it will crash with the same error). However, removing all the operations from the WordCount example doesn't fix the issue there. I'm running Flink 1.6-RC, I've also tried 1.6-SNAPSHOT which made no difference. Any help would be much appreciated. Thanks, Joe Malt Software Engineer Intern Yelp
