lebeg commented on issue #12377: Flaky test: test_mkldnn.test_activation
URL: 
https://github.com/apache/incubator-mxnet/issues/12377#issuecomment-419829957
 
 
   Is failing again:
   
http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/incubator-mxnet/detail/master/1563/pipeline
   
   ```
   ======================================================================
   FAIL: test_mkldnn.test_activation
   ----------------------------------------------------------------------
   Traceback (most recent call last):
     File "/usr/local/lib/python3.5/dist-packages/nose/case.py", line 198, in 
runTest
       self.test(*self.arg)
     File "/work/mxnet/tests/python/mkl/../unittest/common.py", line 172, in 
test_new
       orig_test(*args, **kwargs)
     File "/work/mxnet/tests/python/mkl/test_mkldnn.py", line 298, in 
test_activation
       check_activation_training(stype)
     File "/work/mxnet/tests/python/mkl/test_mkldnn.py", line 294, in 
check_activation_training
       check_numeric_gradient(test, in_location, numeric_eps=1e-6, rtol=0.16, 
atol=1e-4)
     File "/work/mxnet/python/mxnet/test_utils.py", line 912, in 
check_numeric_gradient
       ("NUMERICAL_%s"%name, "BACKWARD_%s"%name))
     File "/work/mxnet/python/mxnet/test_utils.py", line 491, in 
assert_almost_equal
       raise AssertionError(msg)
   AssertionError: 
   Items are not equal:
   Error 1.153736 exceeds tolerance rtol=0.160000, atol=0.000100.  Location of 
maximum error:(0, 2, 1, 1), a=0.119209, b=0.146338
    NUMERICAL_data: array([[[[0.32782555, 0.52154064],
            [0.32782555, 0.        ]],
   ...
    BACKWARD_data: array([[[[0.31696534, 0.53385574],
            [0.3415597 , 0.        ]],
   ...
   -------------------- >> begin captured logging << --------------------
   common: INFO: Setting test np/mx/python random seeds, use 
MXNET_TEST_SEED=304218922 to reproduce.
   --------------------- >> end captured logging << ---------------------
   ```

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