workaround db c 8000 onnection getting closed at runtime... #307
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... for unknown reasons, the db connection is closed at runtime, due
to a high load. Here is an example traceback:
[2021-08-15 17:00:46,840] ERROR in app: Exception on /a/[/r/EtymologicallyRelatedTo/,/c/en/drag/,/c/nds/dragge/] [GET]
Traceback (most recent call last):
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/home/conceptnet/env/lib/python3.6/site-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/conceptnet/conceptnet5/web/conceptnet_web/web.py", line 133, in browse_node
results = responses.lookup_paginated(path, offset=offset, limit=limit)
File "/home/conceptnet/conceptnet5/conceptnet5/api.py", line 150, in lookup_paginated
found = FINDER.lookup(term, limit=(limit + 1), offset=offset)
File "/home/conceptnet/conceptnet5/conceptnet5/db/query.py", line 142, in lookup
return self.lookup_assertion(uri)
File "/home/conceptnet/conceptnet5/conceptnet5/db/query.py", line 194, in lookup_assertion
cursor = self.connection.cursor()
psycopg2.InterfaceError: connection already closed
This patch will re-create the connection any time the connection is
closed. Bonus: factor connection creation inside a property called
connection.
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... for unknown reasons, the db connection is closed at runtime, due
to a high load. Here is an example traceback:
This patch will re-create the connection any time the connection is
closed. Bonus: factor connection creation inside a property called
connection.
ref: #306