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Posted to issues@flink.apache.org by "Enter (Jira)" <ji...@apache.org> on 2020/12/23 01:38:00 UTC
[jira] [Updated] (FLINK-20715) pyflink DataStream filter error.
[ https://issues.apache.org/jira/browse/FLINK-20715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Enter updated FLINK-20715:
--------------------------
Attachment: image-2020-12-23-09-36-54-530.png
> pyflink DataStream filter error.
> --------------------------------
>
> Key: FLINK-20715
> URL: https://issues.apache.org/jira/browse/FLINK-20715
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream, API / Python
> Affects Versions: 1.12.0
> Environment: Flink 1.12
> Reporter: Enter
> Priority: Major
> Attachments: image-2020-12-23-09-36-54-530.png
>
>
> ```
> class MyFilterFunction(FilterFunction):
> def filter(self, value):
> return value[0] % 2 == 0
> def demo_stream():
> see = StreamExecutionEnvironment.get_execution_environment()
> see.set_parallelism(1)
> ds = see.from_collection([(1, 'Hi', 'Hello'), (2, 'Hello', 'Hi')],
> type_info=Types.ROW(
> [Types.INT(), Types.STRING(), Types.STRING()])
> )
> ds.filter(MyFilterFunction()).print()
> ds.print()
> # 执行任务;
> see.execute('job1')
> if __name__ == '__main__':
> demo_stream()
> ```
>
> raise Py4JError( raise Py4JError(py4j.protocol.Py4JError: An error occurred while calling o0.__getstate__. Trace:org.apache.flink.api.python.shaded.py4j.Py4JException: Method __getstate__([]) does not exist at org.apache.flink.api.python.shaded.py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318) at org.apache.flink.api.python.shaded.py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326) at org.apache.flink.api.python.shaded.py4j.Gateway.invoke(Gateway.java:274) at org.apache.flink.api.python.shaded.py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at org.apache.flink.api.python.shaded.py4j.commands.CallCommand.execute(CallCommand.java:79) at org.apache.flink.api.python.shaded.py4j.GatewayConnection.run(GatewayConnection.java:238) at java.lang.Thread.run(Thread.java:748)
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