Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2136#discussion_r67720318
--- Diff:
flink-libraries/flink-python/src/main/python/org/apache/flink/python/api/flink/functions/CoGroupFunction.py
---
@@ -25,13 +25,13 @@ def __init__(self):
self._keys1 = None
self._keys2 = None
- def _configure(self, input_file, output_file, port, env, info):
+ def _configure(self, input_file, output_file, port, env, info,
task_id):
--- End diff --
this parameter should be called subtask_index
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