我有一些从 Evernote API 接收的文件（通过getResource）并使用以下代码写入 Google Cloud Storage：
gcs_file = gcs.open(filename, 'w', content_type=res.mime,
retry_params=write_retry_params)
# Retrieve the binary data and write to GCS
resource_file = note_store.getResource(res.guid, True, False, False, False)
gcs_file.write(resource_file.data.body)
gcs_file.close()
即使对于某些类型的文档，它仍然有效。但是有一些文件 GCS 在日志中抛出了这个：
Unable to fetch URL: https://storage.googleapis.com/evernoteresources/5db799f1-c03c-4056-812a-6d77bad55261/Sleep Away.mp3
和
Got exception while contacting GCS. Will retry in 0.11 seconds.
这些错误似乎没有任何模式。它发生在文档、声音、图片等等——这些文档类型中的一些有效而有些无效。这不是由于大小（因为一些小工作和一些大工作）。
有任何想法吗？
这是完整的堆栈跟踪，但我不确定它是否会有所帮助。
Encountered unexpected error from ProtoRPC method implementation: TimeoutError (('Request to Google Cloud Storage timed out.', DownloadError('Unable to fetch URL: https://storage.googleapis.com/evernoteresources/78413585-2266-4426-b08c-71d6c224f266/Evernote Snapshot 20130512 124546.jpg',)))
Traceback (most recent call last):
File "/python27_runtime/python27_lib/versions/1/protorpc/wsgi/service.py", line 181, in protorpc_service_app
response = method(instance, request)
File "/python27_runtime/python27_lib/versions/1/google/appengine/ext/endpoints/api_config.py", line 972, in invoke_remote
return remote_method(service_instance, request)
File "/python27_runtime/python27_lib/versions/1/protorpc/remote.py", line 412, in invoke_remote_method
response = method(service_instance, request)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/endpoints.py", line 61, in get_note_details
url = tools.registerResource(note_store, req.note_guid, r)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/GlobalUtilities.py", line 109, in registerResource
retry_params=write_retry_params)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/cloudstorage/cloudstorage_api.py", line 69, in open
return storage_api.StreamingBuffer(api, filename, content_type, options)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/cloudstorage/storage_api.py", line 526, in __init__
status, headers, _ = self._api.post_object(path, headers=headers)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/cloudstorage/rest_api.py", line 41, in sync_wrapper
return future.get_result()
File "/python27_runtime/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 325, in get_result
self.check_success()
File "/python27_runtime/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 368, in _help_tasklet_along
value = gen.throw(exc.__class__, exc, tb)
File "/base/data/home/apps/s~quinector/2a.368528733040360018/cloudstorage/storage_api.py", line 84, in do_request_async
'Request to Google Cloud Storage timed out.', e)
TimeoutError: ('Request to Google Cloud Storage timed out.', DownloadError('Unable to fetch URL: https://storage.googleapis.com/evernoteresources/78413585-2266-4426-b08c-71d6c224f266/Evernote Snapshot 20130512 124546.jpg',))