pytorch
voc segmentation dataset source is unavailable
🐛 Describe the bug
Both downloads VOC Segmentation dataset using torchvision.dataset.vocsegmentation and http://host.robots.ox.ac.uk/pascal/VOC/, are unavailable (currently 14/11/2025)
import torchvision
trainset = torchvision.datasets.VOCSegmentation(root='../../data', year='2012', image_set='train', download=True)
---------------------------------------------------------------------------
TimeoutError Traceback (most recent call last)
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:1348, in AbstractHTTPHandler.do_open(self, http_class, req, **http_conn_args)
1347 try:
-> 1348 h.request(req.get_method(), req.selector, req.data, headers,
1349 encode_chunked=req.has_header('Transfer-encoding'))
1350 except OSError as err: # timeout error
File d:\Develop\miniconda\envs\torch\lib\http\client.py:1283, in HTTPConnection.request(self, method, url, body, headers, encode_chunked)
1282 """Send a complete request to the server."""
-> 1283 self._send_request(method, url, body, headers, encode_chunked)
File d:\Develop\miniconda\envs\torch\lib\http\client.py:1329, in HTTPConnection._send_request(self, method, url, body, headers, encode_chunked)
1328 body = _encode(body, 'body')
-> 1329 self.endheaders(body, encode_chunked=encode_chunked)
File d:\Develop\miniconda\envs\torch\lib\http\client.py:1278, in HTTPConnection.endheaders(self, message_body, encode_chunked)
1277 raise CannotSendHeader()
-> 1278 self._send_output(message_body, encode_chunked=encode_chunked)
File d:\Develop\miniconda\envs\torch\lib\http\client.py:1038, in HTTPConnection._send_output(self, message_body, encode_chunked)
1037 del self._buffer[:]
-> 1038 self.send(msg)
1040 if message_body is not None:
1041
1042 # create a consistent interface to message_body
File d:\Develop\miniconda\envs\torch\lib\http\client.py:976, in HTTPConnection.send(self, data)
975 if self.auto_open:
--> 976 self.connect()
977 else:
File d:\Develop\miniconda\envs\torch\lib\http\client.py:942, in HTTPConnection.connect(self)
941 sys.audit("http.client.connect", self, self.host, self.port)
--> 942 self.sock = self._create_connection(
943 (self.host,self.port), self.timeout, self.source_address)
944 # Might fail in OSs that don't implement TCP_NODELAY
File d:\Develop\miniconda\envs\torch\lib\socket.py:857, in create_connection(address, timeout, source_address)
856 try:
--> 857 raise err
858 finally:
859 # Break explicitly a reference cycle
File d:\Develop\miniconda\envs\torch\lib\socket.py:845, in create_connection(address, timeout, source_address)
844 sock.bind(source_address)
--> 845 sock.connect(sa)
846 # Break explicitly a reference cycle
TimeoutError: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
During handling of the above exception, another exception occurred:
URLError Traceback (most recent call last)
Cell In[4], line 4
1 import torch
2 import torchvision
----> 4 trainset = torchvision.datasets.VOCSegmentation(root='../../data', year='2011', image_set='train', download=True)
File d:\Develop\miniconda\envs\torch\lib\site-packages\torchvision\datasets\voc.py:98, in _VOCBase.__init__(self, root, year, image_set, download, transform, target_transform, transforms)
95 voc_root = os.path.join(self.root, base_dir)
97 if download:
---> 98 download_and_extract_archive(self.url, self.root, filename=self.filename, md5=self.md5)
100 if not os.path.isdir(voc_root):
101 raise RuntimeError("Dataset not found or corrupted. You can use download=True to download it")
File d:\Develop\miniconda\envs\torch\lib\site-packages\torchvision\datasets\utils.py:395, in download_and_extract_archive(url, download_root, extract_root, filename, md5, remove_finished)
392 if not filename:
393 filename = os.path.basename(url)
--> 395 download_url(url, download_root, filename, md5)
397 archive = os.path.join(download_root, filename)
398 print(f"Extracting {archive} to {extract_root}")
File d:\Develop\miniconda\envs\torch\lib\site-packages\torchvision\datasets\utils.py:122, in download_url(url, root, filename, md5, max_redirect_hops)
119 _download_file_from_remote_location(fpath, url)
120 else:
121 # expand redirect chain if needed
--> 122 url = _get_redirect_url(url, max_hops=max_redirect_hops)
124 # check if file is located on Google Drive
125 file_id = _get_google_drive_file_id(url)
File d:\Develop\miniconda\envs\torch\lib\site-packages\torchvision\datasets\utils.py:66, in _get_redirect_url(url, max_hops)
63 headers = {"Method": "HEAD", "User-Agent": USER_AGENT}
65 for _ in range(max_hops + 1):
---> 66 with urllib.request.urlopen(urllib.request.Request(url, headers=headers)) as response:
67 if response.url == url or response.url is None:
68 return url
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:216, in urlopen(url, data, timeout, cafile, capath, cadefault, context)
214 else:
215 opener = _opener
--> 216 return opener.open(url, data, timeout)
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:519, in OpenerDirector.open(self, fullurl, data, timeout)
516 req = meth(req)
518 sys.audit('urllib.Request', req.full_url, req.data, req.headers, req.get_method())
--> 519 response = self._open(req, data)
521 # post-process response
522 meth_name = protocol+"_response"
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:536, in OpenerDirector._open(self, req, data)
533 return result
535 protocol = req.type
--> 536 result = self._call_chain(self.handle_open, protocol, protocol +
537 '_open', req)
538 if result:
539 return result
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:496, in OpenerDirector._call_chain(self, chain, kind, meth_name, *args)
494 for handler in handlers:
495 func = getattr(handler, meth_name)
--> 496 result = func(*args)
497 if result is not None:
498 return result
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:1377, in HTTPHandler.http_open(self, req)
1376 def http_open(self, req):
-> 1377 return self.do_open(http.client.HTTPConnection, req)
File d:\Develop\miniconda\envs\torch\lib\urllib\request.py:1351, in AbstractHTTPHandler.do_open(self, http_class, req, **http_conn_args)
1348 h.request(req.get_method(), req.selector, req.data, headers,
1349 encode_chunked=req.has_header('Transfer-encoding'))
1350 except OSError as err: # timeout error
-> 1351 raise URLError(err)
1352 r = h.getresponse()
1353 except:
URLError: <urlopen error [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond>
Versions
Collecting environment information... PyTorch version: 2.5.1 Is debug build: False CUDA used to build PyTorch: None ROCM used to build PyTorch: N/A
OS: Microsoft Windows 11 Pro (10.0.26200 64-bit) GCC version: Could not collect Clang version: Could not collect CMake version: Could not collect Libc version: N/A
Python version: 3.10.18 | packaged by Anaconda, Inc. | (main, Jun 5 2025, 13:08:55) [MSC v.1929 64 bit (AMD64)] (64-bit runtime) Python platform: Windows-10-10.0.26200-SP0 Is CUDA available: False CUDA runtime version: No CUDA CUDA_MODULE_LOADING set to: N/A GPU models and configuration: No CUDA Nvidia driver version: No CUDA cuDNN version: No CUDA Is XPU available: False HIP runtime version: N/A MIOpen runtime version: N/A Is XNNPACK available: True
CPU: Name: AMD Ryzen 7 9700X 8-Core Processor Manufacturer: AuthenticAMD Family: 107 Architecture: 9 ProcessorType: 3 DeviceID: CPU0 CurrentClockSpeed: 3800 MaxClockSpeed: 3800 L2CacheSize: 8192 L2CacheSpeed: None Revision: 17408
Versions of relevant libraries: [pip3] mkl_fft==1.3.11 [pip3] mkl_random==1.2.8 [pip3] mkl-service==2.4.0 [pip3] numpy==1.23.5 [pip3] torch==2.5.1 [pip3] torchaudio==2.5.1 [pip3] torchvision==0.20.1 [conda] blas 1.0 mkl [conda] cpuonly 2.0 0 pytorch [conda] intel-openmp 2023.1.0 h59b6b97_46320 [conda] mkl 2023.1.0 h6b88ed4_46358 [conda] mkl-service 2.4.0 py310h827c3e9_2 [conda] mkl_fft 1.3.11 py310h827c3e9_0 [conda] mkl_random 1.2.8 py310hc64d2fc_0 [conda] numpy 1.23.5 pypi_0 pypi [conda] pytorch 2.5.1 py3.10_cpu_0 pytorch [conda] pytorch-mutex 1.0 cpu pytorch [conda] tbb 2021.8.0 h59b6b97_0 [conda] torchaudio 2.5.1 py310_cpu pytorch [conda] torchvision 0.20.1 py310_cpu pytorch
