[MXNET-769] Use MXNET_HOME in a tempdir in windows to prevent access …

…denied due t… (apache#13531)

* Use MXNET_HOME in cwd in windows to prevent access denied due to concurrent data downloads

Fixes apache#13484

* Revert "Disabled flaky test test_gluon_data.test_recordimage_dataset_with_data_loader_multiworker (apache#13527)"

This reverts commit 3d499cb.

ci/windows/test_py2_cpu.ps1

@@ -16,9 +16,12 @@
 # under the License.
 
 7z x -y windows_package.7z
+
 $env:MXNET_LIBRARY_PATH=join-path $pwd.Path windows_package\lib\libmxnet.dll
 $env:PYTHONPATH=join-path $pwd.Path windows_package\python
 $env:MXNET_STORAGE_FALLBACK_LOG_VERBOSE=0
+$env:MXNET_HOME=[io.path]::combine($PSScriptRoot, 'mxnet_home')
+
 c:\Anaconda3\envs\py2\Scripts\pip install -r tests\requirements.txt
 c:\Anaconda3\envs\py2\python.exe -m nose -v --with-timer --timer-ok 1 --timer-warning 15 --timer-filter warning,error --with-xunit --xunit-file nosetests_unittest.xml tests\python\unittest
 if (! $?) { Throw ("Error running unittest") }

ci/windows/test_py2_gpu.ps1

@@ -16,9 +16,12 @@
 # under the License.
 
 7z x -y windows_package.7z
+
 $env:MXNET_LIBRARY_PATH=join-path $pwd.Path windows_package\lib\libmxnet.dll
 $env:PYTHONPATH=join-path $pwd.Path windows_package\python
 $env:MXNET_STORAGE_FALLBACK_LOG_VERBOSE=0
+$env:MXNET_HOME=[io.path]::combine($PSScriptRoot, 'mxnet_home')
+
 c:\Anaconda3\envs\py2\Scripts\pip install -r tests\requirements.txt
 c:\Anaconda3\envs\py2\python.exe -m nose -v --with-timer --timer-ok 1 --timer-warning 15 --timer-filter warning,error --with-xunit --xunit-file nosetests_unittest.xml tests\python\unittest
 if (! $?) { Throw ("Error running unittest") }

ci/windows/test_py3_cpu.ps1

@@ -16,9 +16,12 @@
 # under the License.
 
 7z x -y windows_package.7z
+
 $env:MXNET_LIBRARY_PATH=join-path $pwd.Path windows_package\lib\libmxnet.dll
 $env:PYTHONPATH=join-path $pwd.Path windows_package\python
 $env:MXNET_STORAGE_FALLBACK_LOG_VERBOSE=0
+$env:MXNET_HOME=[io.path]::combine($PSScriptRoot, 'mxnet_home')
+
 c:\Anaconda3\envs\py3\Scripts\pip install -r tests\requirements.txt
 c:\Anaconda3\envs\py3\python.exe -m nose -v --with-timer --timer-ok 1 --timer-warning 15 --timer-filter warning,error --with-xunit --xunit-file nosetests_unittest.xml tests\python\unittest
 if (! $?) { Throw ("Error running unittest") }

ci/windows/test_py3_gpu.ps1

@@ -16,9 +16,12 @@
 # under the License.
 
 7z x -y windows_package.7z
+
 $env:MXNET_LIBRARY_PATH=join-path $pwd.Path windows_package\lib\libmxnet.dll
 $env:PYTHONPATH=join-path $pwd.Path windows_package\python
 $env:MXNET_STORAGE_FALLBACK_LOG_VERBOSE=0
+$env:MXNET_HOME=[io.path]::combine($PSScriptRoot, 'mxnet_home')
+
 c:\Anaconda3\envs\py3\Scripts\pip install -r tests\requirements.txt
 c:\Anaconda3\envs\py3\python.exe -m nose -v --with-timer --timer-ok 1 --timer-warning 15 --timer-filter warning,error --with-xunit --xunit-file nosetests_unittest.xml tests\python\unittest
 if (! $?) { Throw ("Error running unittest") }

tests/python/unittest/test_gluon_data.py

@@ -78,7 +78,6 @@ def _dataset_transform_fn(x, y):
     return x, y
 
 @with_seed()
-@unittest.skip("Flaky test: https://github.com/apache/incubator-mxnet/issues/13484")
 def test_recordimage_dataset_with_data_loader_multiworker():
     recfile = prepare_record()
     dataset = gluon.data.vision.ImageRecordDataset(recfile)