Error 2006 Mysql Server Has Gone Away Python
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the error 2006 mysql server has gone away while importing workings and policies of this site About Us Learn more about Stack general error 2006 mysql server has gone away magento Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs error 2006 (hy000): mysql server has gone away Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join python mysqldb ping them; it only takes a minute: Sign up Error 2006: “MySQL server has gone away” using Python, Bottle Microframework and Apache up vote 2 down vote favorite 2 After accessing my web app using: - Python 2.7 - the Bottle micro framework v. 0.10.6 - Apache 2.2.22 - mod_wsgi - on Ubuntu Server 12.04 64bit; I'm receiving this error after
Mysqldb Python Reconnect
several hours: OperationalError: (2006, 'MySQL server has gone away') I'm using MySQL - the native one included in Python. It usually happens when I don't access the server. I've tried closing all the connections, which I do, using this: cursor.close() db.close() where db is the standard MySQLdb.Connection() call. The my.cnf file looks something like this: key_buffer = 16M max_allowed_packet = 128M thread_stack = 192K thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP #max_connections = 100 #table_cache = 64 #thread_concurrency = 10 It is the default configuration file except max_allowed_packet is 128M instead of 16M. The queries to the database are quite simple, at most they retrieve approximately 100 records. Can anyone help me fix this? One idea I did have was use try/except but I'm not sure if that would actually work. Thanks in advance, Jamie Update: try/except calls didn't work. python mysql apache mod-wsgi bottle share|improve this question edited Sep 18 '12 at 4:59 asked Sep 16 '12
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Python Mysql Operationalerror
About Us Learn more about Stack Overflow the company Business Learn more about flask sqlalchemy mysql server has gone away hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join django wait_timeout the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Python and Django OperationalError (2006, http://stackoverflow.com/questions/12444272/error-2006-mysql-server-has-gone-away-using-python-bottle-microframework-and 'MySQL server has gone away') up vote 16 down vote favorite 3 Original: I have recently started getting MySQL OperationalErrors from some of my old code and cannot seem to trace back the problem. Since it was working before, I thought it may have been a software update that broke something. I am using python 2.7 with django runfcgi with nginx. Here is my original http://stackoverflow.com/questions/14163429/python-and-django-operationalerror-2006-mysql-server-has-gone-away code: views.py DBNAME = "test" DBIP = "localhost" DBUSER = "django" DBPASS = "password" db = MySQLdb.connect(DBIP,DBUSER,DBPASS,DBNAME) cursor = db.cursor() def list(request): statement = "SELECT item from table where selected = 1" cursor.execute(statement) results = cursor.fetchall() I have tried the following, but it still does not work: views.py class DB: conn = None DBNAME = "test" DBIP = "localhost" DBUSER = "django" DBPASS = "password" def connect(self): self.conn = MySQLdb.connect(DBIP,DBUSER,DBPASS,DBNAME) def cursor(self): try: return self.conn.cursor() except (AttributeError, MySQLdb.OperationalError): self.connect() return self.conn.cursor() db = DB() cursor = db.cursor() def list(request): cursor = db.cursor() statement = "SELECT item from table where selected = 1" cursor.execute(statement) results = cursor.fetchall() Currently, my only workaround is to do MySQLdb.connect() in each function that uses mysql. Also I noticed that when using django's manage.py runserver, I would not have this problem while nginx would throw these errors. I doubt that I am timing out with the connection because list() is being called within seconds of starting the server up. Were there any updates to the software I am using that would cause this to break/is there any fix for this? Edit: I realized that I recently wrote a piece of middle-w
look into this ASAP? deleted-user-101937 | 2 posts | Aug. 27, 2013, 10:08 p.m. | permalink This error is typically caused by MySQL closing the connection due to idleness, although it can also be caused by intermediate https://www.pythonanywhere.com/forums/topic/858/ network equipment closing the connection. For example, overly aggressive firewalls and load balancers can sometimes kill off connections after a relatively short idle period. Is this a web application, a scheduled script, something you're running from the command-line or a long-running daemon? Particularly in web applications a connection pool is often used, to cache database connections for performance reasons. If you're using a pool, be aware that you'll need to test the connection as part of removing mysql server it from the pool. You can use the MySQL ping function for this - see this blog post for some more detail. If this error occurs on an actively used connections (i.e. where there's been a successful operation less than, say, 60 seconds before) then that's definitely something to let the admins know about. Please indicate the frequency with which it occurs as well. If, however, it's an occasional thing then it's something you may just have to mysql server has deal with in your code. Keep your transactions short because a connection close midway through a transaction will cause an implicit rollback and your changes will be lost. Always test a potentially idle connection (especially one that might have been sitting in a connection pool for hours) just before starting a new transaction and reconnect it or make a new connection if necessary. EDIT By the way, you might wonder why MySQLdb doesn't just automatically reconnect for you without all this rubbish. The reason is that if you have a disconnect, you need to be aware of it because any pending transactions may have not been committed. In fact, if the disconnection happens at the point you commit your transaction, I'm not aware of any way to tell whether your transaction was committed or not. Hence, libraries can't just quietly reconnect for you because it may hide underlying issues. This post has some more discussion (although it's targetted at Java users, the principles remain the same). Of course, as long as you keep your transactions short, the chance of a disconnection at commit time should be very low since the connection should never be idle - that would only occur due to loss of network connectivity or similar. If your application has critical reliability considerations, however (such as tracking account balances) then I suggest you always update a separate audit