dataset info (/info/datastack/<datastack>) fails if NeuroglancerJsonServer is down #36
Description
Access to datastack details fails when nglstate is not responding. A better behavior would be to simply not generate the links. 🙃
DEBUG:urllib3.connectionpool:https://<global>:443 "GET /info/api/v2/datastack/full/<datastack> HTTP/1.1" 200 928
DEBUG:urllib3.connectionpool:https://<local>:443 "GET /segmentation/api/versions HTTP/1.1" 200 36
DEBUG:urllib3.connectionpool:https://<local>:443 "GET /segmentation/table/<datastack>/info HTTP/1.1" 200 976
DEBUG:urllib3.connectionpool:https://<global>:443 "POST /nglstate/api/v1/post HTTP/1.1" 502 157
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 2213, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 2193, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.9/site-packages/flask_restx/api.py", line 672, in error_router
10.48.0.14 - - [08/Jan/2026:04:44:45 +0000] "GET /info/datastack/<datastack> HTTP/1.1" 502 559 "https://<global>/info/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36" ""
return original_handler(e)
File "/usr/local/lib/python3.9/site-packages/flask_cors/extension.py", line 176, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 2190, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 1486, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.9/site-packages/flask_restx/api.py", line 672, in error_router
return original_handler(e)
File "/usr/local/lib/python3.9/site-packages/flask_cors/extension.py", line 176, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.9/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/usr/local/lib/python3.9/site-packages/middle_auth_client/decorators.py", line 376, in decorated_function
return f(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/middle_auth_client/decorators.py", line 532, in decorated_function
return f(*args, **kwargs)
File "/app/./annotationinfoservice/datasets/views.py", line 174, in datastack_view
state_id = client.state.upload_state_json(spelunker_state)
File "/usr/local/lib/python3.9/site-packages/caveclient/jsonservice.py", line 168, in upload_state_json
handle_response(response, as_json=False)
File "/usr/local/lib/python3.9/site-packages/caveclient/base.py", line 81, in handle_response
_raise_for_status(response, log_warning=log_warning)
File "/usr/local/lib/python3.9/site-packages/caveclient/base.py", line 72, in _raise_for_status
raise requests.HTTPError(http_error_msg, response=r)
requests.exceptions.HTTPError: 502 Server Error: Bad Gateway for url: https://<global>/nglstate/api/v1/post content:b'<html>\r\n<head><title>502 Bad Gateway</title></head>\r\n<body>\r\n<center><h1>502 Bad Gateway</h1></center>\r\n<hr><center>nginx/1.23.2</center>\r\n</body>\r\n</html>\r\n'
2026/01/08 04:44:45 [error] 14#14: *8676 upstream prematurely closed connection while reading response header from upstream, client: 10.48.0.14, server: , request: "GET /info/datastack/<datastack> HTTP/1.1", upstream: "uwsgi://unix:///tmp/uwsgi.sock:", host: "<global>", referrer: "https://<global>/info/"