tvalentyn commented on pull request #12811:
URL: https://github.com/apache/beam/pull/12811#issuecomment-692844451
> able to reproduce the last two issues (they seem to be random). Any ideas
on what went wrong?
Those seem to be flaky tests :(. Found this in the logs:
```
<testcase
classname="apache_beam.runners.worker.data_plane_test.DataChannelTest"
name="test_time_based_flush_grpc_data_channel" time="0.336"><failure
message="AssertionError: Lists differ: [inst[26 chars]id: "2" data: "ghi" ,
instruction_id: "2" tran[22 chars]ef" ] != [inst[26 chars]id: "1" data: "def" ,
instruction_id: "2" tran[22 chars]hi" ] First differing element 0:
instruction_id: "2" transform_id: "2" data: "ghi" instruction_id: "2"
transform_id: "1" data: "def" [instruction_id: "2" + transform_id: "1" +
data: "def" + , + instruction_id: "2" transform_id: "2" data: "ghi" - , -
instruction_id: "2" - transform_id: "1" - data: "def" ]">self =
<apache_beam.runners.worker.data_plane_test.DataChannelTest
testMethod=test_time_based_flush_grpc_data_channel>
def test_time_based_flush_grpc_data_channel(self):
> self._grpc_data_channel_test(True)
apache_beam/runners/worker/data_plane_test.py:44:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _
apache_beam/runners/worker/data_plane_test.py:74: in _grpc_data_channel_test
data_channel_service, data_channel_client, time_based_flush)
apache_beam/runners/worker/data_plane_test.py:86: in _data_channel_test
self._data_channel_test_one_direction(server, client, time_based_flush)
apache_beam/runners/worker/data_plane_test.py:129: in
_data_channel_test_one_direction
instruction_id='2', transform_id=transform_2, data=b'ghi')
E AssertionError: Lists differ: [inst[26 chars]id: "2"
E data: "ghi"
E , instruction_id: "2"
E tran[22 chars]ef"
E ] != [inst[26 chars]id: "1"
E data: "def"
E , instruction_id: "2"
E tran[22 chars]hi"
E ]
E
E First differing element 0:
E instruction_id: "2"
E transform_id: "2"
E data: "ghi"
E
E instruction_id: "2"
E transform_id: "1"
E data: "def"
E
E
E [instruction_id: "2"
E + transform_id: "1"
E + data: "def"
E + ,
E + instruction_id: "2"
E transform_id: "2"
E data: "ghi"
E - ,
E - instruction_id: "2"
E - transform_id: "1"
E - data: "def"
E ]</failure></testcase>
```
There is an open issue about it:
https://issues.apache.org/jira/browse/BEAM-10768.
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