Hi Joe, Did you try the word_count example from the flink codebase?[1]
Recently, I tried this example, it works fine to me. An example of an official document may not guarantee your success due to maintenance issues. cc @Chesnay [1]: https://github.com/apache/flink/blob/master/flink-libraries/flink-streaming-python/src/test/python/org/apache/flink/streaming/python/api/examples/word_count.py Thanks, vino. Joe Malt <[email protected]> 于2018年8月8日周三 上午5:29写道： > 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 >
