Juntao Hu created FLINK-28908:
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Summary: Coder for LIST type is incorrectly chosen is PyFlink
Key: FLINK-28908
URL: https://issues.apache.org/jira/browse/FLINK-28908
Project: Flink
Issue Type: Bug
Components: API / Python
Affects Versions: 1.15.1, 1.14.5
Reporter: Juntao Hu
Fix For: 1.16.0, 1.15.2, 1.14.6
Code to reproduce this bug, the result is `[None, None, None]`:
{code:python}
jvm = get_gateway().jvm
env = StreamExecutionEnvironment.get_execution_environment()
j_item = jvm.java.util.ArrayList()
j_item.add(1)
j_item.add(2)
j_item.add(3)
j_list = jvm.java.util.ArrayList()
j_list.add(j_item)
type_info = Types.LIST(Types.INT())
ds = DataStream(env._j_stream_execution_environment.fromCollection(j_list,
type_info.get_java_type_info()))
ds.map(lambda e: print(e))
env.execute() {code}
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