leezu edited a comment on pull request #18445:
URL: https://github.com/apache/incubator-mxnet/pull/18445#issuecomment-656233768


   @ma-hei looking at the output of unix-cpu, I also see that the dataloader 
related tests are hanging in Tests / Python3: MKLDNN-MKL-CPU. The recordio test 
you point out (which also hangs) is also part of the data api.
   
   cc @zhreshold there may be incompatibility of the data code with Python 3.8
   
   ```
   [2020-07-02T19:41:12.626Z] 
tests/python/unittest/test_gluon_data.py::test_recordimage_dataset_handle 
PASSED [  3%]
   
   [2020-07-02T19:41:14.506Z] 
tests/python/unittest/test_gluon_data.py::test_recordimage_dataset_with_data_loader_multiworker
 PASSED [  3%]
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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870 in run
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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870 in run
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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870 in run
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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870 in run
   
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932 in _bootstrap_inner
   
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870 in run
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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870 in run
   
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932 in _bootstrap_inner
   
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890 in _bootstrap
   
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in getlines
   
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in getline
   
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289 in line
   
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line 43 in check_leak_ndarray
   
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call_fixture_func
   
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pytest_fixture_setup
   
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fillfixtures
   
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pytest_runtest_setup
   
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from_call
   
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call_runtest_hook
   
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runtestprotocol
   
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pytest_runtest_protocol
   
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"/usr/local/lib/python3.8/dist-packages/pluggy/callers.py", line 187 in 
_multicall
   
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pytest_runtestloop
   
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pytest_cmdline_main
   
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   [2020-07-02T22:59:11.698Z] Sending interrupt signal to process
   
   [2020-07-02T22:59:18.828Z] 2020-07-02 22:59:11,751 - root - WARNING - Signal 
15 received, cleaning up...
   
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Cleaning up containers
   
   [2020-07-02T22:59:18.828Z] 2020-07-02 22:59:15,573 - root - INFO - ☠: 
stopped container 8db2488e60e1
   
   [2020-07-02T22:59:18.828Z] 2020-07-02 22:59:15,810 - root - INFO - 🚽: 
removed container 8db2488e60e1
   
   [2020-07-02T22:59:18.828Z] 2020-07-02 22:59:15,810 - root - INFO - Cleaning 
up containers finished.
   
   [2020-07-02T22:59:18.828Z] 2020-07-02 22:59:15,810 - root - WARNING - done. 
Exiting with error.
   ```


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