WantWriteError when syncing > 100 kB files

[raphael0202]

On linux, I get a WantWriteError from the OpenSSL library when I try to upload a file > 100 kB using the sync client:

00:27:49 INFO 139700344252160 Thread-2 Processing 1 changes
00:27:49 INFO 139700344252160 Thread-2 To be processed 1
Exception in thread Thread-27:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/job/change_stores.py", line 166, in run
if not callback2(self.change):
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/job/continous_merger.py", line 613, in processor_callback2
proc.process_change()
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/job/change_processor.py", line 109, in process_change
self.process_upload(item['node']['node_path'], is_mod=(item['type'] != 'create'), callback_dict=item)
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/job/change_processor.py", line 283, in process_upload
callback_dict, max_upload_size=max_upload_size)
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/sdkremote/remote.py", line 770, in upload_and_hashstat
self.perform_request(url=url, type='post', data=data, files=files, with_progress=callback_dict)
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/sdkremote/remote.py", line 339, in perform_request
stream=stream, with_progress=with_progress)
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/sdkremote/remote.py", line 284, in perform_with_tokens
max_size=self.upload_max_size)
File "/home/raphael/Documents/Projets/pydio-sync/src/pydio/sdkremote/remote.py", line 1232, in upload_file_with_progress
proxies=self.proxies
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 94, in post
return request('post', url, data=data, json=json, *_kwargs)
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 49, in request
return session.request(method=method, url=url, *_kwargs)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 457, in request
resp = self.send(prep, *_send_kwargs)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 569, in send
r = adapter.send(request, *_kwargs)
File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 362, in send
timeout=timeout
File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 516, in urlopen
body=body, headers=headers)
File "/usr/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 308, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python2.7/httplib.py", line 1001, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python2.7/httplib.py", line 1035, in _send_request
self.endheaders(body)
File "/usr/lib/python2.7/httplib.py", line 997, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 854, in _send_output
self.send(message_body)
File "/usr/lib/python2.7/httplib.py", line 823, in send
self.sock.sendall(datablock)
File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 208, in sendall
return self.connection.sendall(data)
File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 977, in sendall
self._raise_ssl_error(self._ssl, result)
File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 849, in _raise_ssl_error
raise WantWriteError()
WantWriteError

[7omate]

Hi, how are you running PydioSync?
Did you try from another platform?
What's your server version and configuration (ssl wise) like?
Does it work without SSL?

[raphael0202]

Hello, sorry for my late answer.
I'm running PydioSync from directly using python main.py in the src folder, latest version from Github.
I only tried on Linux.
Using Nginx 1.9.10, SSL certificate obtained from Let's encrypt.
And I haven't tried without SSL, as the Pydio server is in production and heavily used, I would rather not.

edit: The Nginx server performs a redirection on the 443 port, I need to modify this setting to be able to connect without SSL.