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https://issues.apache.org/jira/browse/FLINK-14479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323170#comment-17323170
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Flink Jira Bot commented on FLINK-14479:
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> Strange exceptions found in log file after executing `test_udf.py`
> ------------------------------------------------------------------
>
> Key: FLINK-14479
> URL: https://issues.apache.org/jira/browse/FLINK-14479
> Project: Flink
> Issue Type: Improvement
> Components: API / Python
> Reporter: sunjincheng
> Assignee: Wei Zhong
> Priority: Major
> Labels: stale-assigned
> Fix For: 1.13.0
>
> Attachments: screenshot-1.png
>
>
> There are several strange exceptions as follow in
> `${flink_source}/build-target/log/flink-${username}-python-udf-boot-${machine_name}.local.log`
> after executing
> `${flink_source}/flink-python/pyflink/table/tests/test_udf.py`:
> Traceback (most recent call last):
> {code:java}
> File
> "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py",
> line 193, in _run_module_as_main
> "__main__", mod_spec)
> File
> "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py",
> line 85, in _run_code
> exec(code, run_globals)
> File
> "/Users/zhongwei/flink/flink-python/pyflink/fn_execution/sdk_worker_main.py",
> line 30, in <module>
> apache_beam.runners.worker.sdk_worker_main.main(sys.argv)
> File
> "/Users/zhongwei/pyflink_env/py37/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker_main.py",
> line 148, in main
> sdk_pipeline_options.view_as(pipeline_options.ProfilingOptions))
> File
> "/Users/zhongwei/pyflink_env/py37/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker.py",
> line 133, in run
> for work_request in control_stub.Control(get_responses()):
> File
> "/Users/zhongwei/pyflink_env/py37/lib/python3.7/site-packages/grpc/_channel.py",
> line 364, in __next__
> return self._next()
> File
> "/Users/zhongwei/pyflink_env/py37/lib/python3.7/site-packages/grpc/_channel.py",
> line 347, in _next
> raise self
> grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
> status = StatusCode.CANCELLED
> details = "Runner closed connection"
> debug_error_string =
> "{"created":"@1571660342.057172000","description":"Error received from peer
> ipv6:[::1]:52699","file":"src/core/lib/surface/call.cc","file_line":1052,"grpc_message":"Runner
> closed connection","grpc_status":1}"{code}
> It appears randomly when executing test cases of blink planner. Although it
> does not affect test results we need to find out why it appears.
> Welcome any feedback!
>
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