ThomasDelteil commented on issue #9553: test_operator_gpu.test_correlation fails
URL: 
https://github.com/apache/incubator-mxnet/issues/9553#issuecomment-382870242
 
 
   Seems to be flaky again, can we reopen?:
   ```
   ======================================================================
   
   FAIL: test_operator_gpu.test_correlation
   
   ----------------------------------------------------------------------
   
   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 "/usr/local/lib/python3.5/dist-packages/nose/util.py", line 620, in 
newfunc
   
       return func(*arg, **kw)
   
     File "/work/mxnet/tests/python/gpu/../unittest/common.py", line 157, in 
test_new
   
       orig_test(*args, **kwargs)
   
     File "/work/mxnet/tests/python/gpu/../unittest/test_operator.py", line 
2379, in test_correlation
   
       unittest_correlation((5,1,15,15), kernel_size = 1,max_displacement = 
5,stride1 = 1,stride2 = 1,pad_size = 5,is_multiply = False, dtype = dtype)
   
     File "/work/mxnet/tests/python/gpu/../unittest/test_operator.py", line 
2349, in unittest_correlation
   
       assert_almost_equal(exe1.grad_dict['img1'].asnumpy(), grad1, rtol=1e-3, 
atol=1e-4)
   
     File "/work/mxnet/python/mxnet/test_utils.py", line 493, in 
assert_almost_equal
   
       raise AssertionError(msg)
   
   AssertionError: 
   
   Items are not equal:
   
   Error 32.733224 exceeds tolerance rtol=0.001000, atol=0.000100.  Location of 
maximum error:(4, 0, 10, 11), a=63.000000, b=61.000000
   
    a: array([[[[ 57.,  97.,  79., ...,  63.,  65.,  95.],
   
            [ 49.,  67.,  45., ...,  51.,  51.,  79.],
   
            [ 73., 101., 121., ...,  57.,  91., 115.],...
   
    b: array([[[[ 57.,  97.,  79., ...,  63.,  65.,  95.],
   
            [ 49.,  67.,  45., ...,  51.,  51.,  79.],
   
            [ 73., 101., 121., ...,  57.,  91., 115.],...
   
   -------------------- >> begin captured logging << --------------------
   
   common: INFO: Setting test np/mx/python random seeds, use 
MXNET_TEST_SEED=1344567771 to reproduce.
   
   --------------------- >> end captured logging << ---------------------
   ```

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