szha commented on a change in pull request #11181: [MXNET-525] Add retry logic
to download functions to fix flaky tests
URL: https://github.com/apache/incubator-mxnet/pull/11181#discussion_r193616509
##########
File path: python/mxnet/gluon/utils.py
##########
@@ -200,26 +202,35 @@ def download(url, path=None, overwrite=False,
sha1_hash=None):
fname = os.path.join(path, url.split('/')[-1])
else:
fname = path
+ assert retries >= 0, "Number of retries should be at least 0"
if overwrite or not os.path.exists(fname) or (sha1_hash and not
check_sha1(fname, sha1_hash)):
dirname = os.path.dirname(os.path.abspath(os.path.expanduser(fname)))
if not os.path.exists(dirname):
os.makedirs(dirname)
-
- print('Downloading %s from %s...'%(fname, url))
- r = requests.get(url, stream=True)
- if r.status_code != 200:
- raise RuntimeError("Failed downloading url %s"%url)
- with open(fname, 'wb') as f:
- for chunk in r.iter_content(chunk_size=1024):
- if chunk: # filter out keep-alive new chunks
- f.write(chunk)
-
- if sha1_hash and not check_sha1(fname, sha1_hash):
- raise UserWarning('File {} is downloaded but the content hash does
not match. ' \
- 'The repo may be outdated or download may be
incomplete. ' \
- 'If the "repo_url" is overridden, consider
switching to ' \
- 'the default repo.'.format(fname))
+ while (retries+1 > 0):
+ try:
+ print('Downloading %s from %s...'%(fname, url))
+ r = requests.get(url, stream=True)
+ if r.status_code != 200:
+ raise RuntimeError("Failed downloading url %s"%url)
+ with open(fname, 'wb') as f:
+ for chunk in r.iter_content(chunk_size=1024):
+ if chunk: # filter out keep-alive new chunks
+ f.write(chunk)
+
+ if sha1_hash and not check_sha1(fname, sha1_hash):
+ raise UserWarning('File {} is downloaded but the content
hash does not match. ' \
+ 'The repo may be outdated or download
may be incomplete. ' \
+ 'If the "repo_url" is overridden,
consider switching to ' \
+ 'the default repo.'.format(fname))
+ break
+ except Exception as e:
Review comment:
should backoff be added too?
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