[FLINK-28908] Coder for LIST type is incorrectly chosen is PyFlink

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.14.5, 1.15.1
• Fix Version/s: 1.16.0, 1.15.2, 1.14.6
• Component/s: API / Python
• Labels: pull-request-available
• Assignee: Juntao Hu
• Reporter: Juntao Hu
• Created: 10/Aug/22 10:16
• Updated: 15/Aug/22 04:44
• Resolved: 15/Aug/22 04:44

Description

Code to reproduce this bug, the result is `[None, None, None]`:

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() 

Issue Links

• links to: GitHub Pull Request #20539