ignore reclose db error by pymysql.err.Error #31
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when it used on flask with socketio, will be trigger teardown_request event as muilt times by the client long-polling, there were some trace log:
Traceback (most recent call last):
File "D:\Tools\Python363\lib\site-packages\eventlet\wsgi.py", line 539, in handle_one_response
result = self.application(self.environ, start_response)
File "D:\Tools\Python363\lib\site-packages\flask\app.py", line 1997, in call
return self.wsgi_app(environ, start_response)
File "D:\Tools\Python363\lib\site-packages\engineio\middleware.py", line 49, in call
return self.wsgi_app(environ, start_response)
File "D:\Tools\Python363\lib\site-packages\flask\app.py", line 1993, in wsgi_app
ctx.auto_pop(error)
File "D:\Tools\Python363\lib\site-packages\flask\ctx.py", line 387, in auto_pop
self.pop(exc)
File "D:\Tools\Python363\lib\site-packages\flask\ctx.py", line 353, in pop
self.app.do_teardown_request(exc)
File "D:\Tools\Python363\lib\site-packages\flask\app.py", line 1879, in do_teardown_request
func(exc)
File "D:\Tools\Python363\lib\site-packages\flaskext\mysql.py", line 59, in teardown_request
ctx.mysql_db.close()
File "D:\Tools\Python363\lib\site-packages\pymysql\connections.py", line 728, in close
raise err.Error("Already closed")
pymysql.err.Error: Already closed