Mysql Error Nr 2006 Mysql
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Mysql Server Has Gone Away 2006
only takes a minute: Sign up MySQL error 2006: mysql server has gone away up vote 94 down vote favorite 14 I'm running a server at my office to process some files and report the results to a remote MySQL server. The files processing takes sometime and the process dies halfway through with the following error: 2006, mysql server has mysql server has gone away error gone away Ive heard about the MySQL setting, wait_timeout, but do I need to change that on the server at my office or the remote MySQL server? mysql mysql-error-2006 share|improve this question edited Jan 25 at 7:44 bpoiss 7,69311435 asked Oct 29 '11 at 22:44 floatleft 97752540 2 it depends of that witch server gives the error –bksi Oct 29 '11 at 23:01 1 possible duplicate of ERROR 2006 (HY000): MySQL server has gone away –Simon East Oct 6 '14 at 0:40 For people getting here from Google: If changing the max_allowed_packet size or wait_timeout amount doesn't fix it, check your memory usage. I was getting the same error and it was being caused by my server running out of memory. I added a 1GB swap file and that fixed it. –Pikamander2 Sep 19 at 23:52 1 @Pikamander2 thanks for the hint! –ihsan Sep 26 at 9:10 add a comment| 13 Answers 13 active oldest votes up vote 4 down vote accepted It may be easier to check if the connection and re-establish it
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has gone away" Part 1: max_allowed_packet. By peter_laursen. Last updated on August 10, 2009. 30 Most MySQL users have tried http://blog.webyog.com/mysql-server-has-gone-away-part-1-max_allowed_packet/ getting this rather cryptic error message: "MySQL server has gone away". The MySQL documentation describes lots of possible reasons for this here: http://dev.mysql.com/doc/refman/5.1/en/gone-away.html However this page is of http://ronaldbradford.com/blog/sqlstatehy000-general-error-2006-mysql-server-has-gone-away-2013-01-02/ little help for most users, I think. Dozens of reasons are listed, but except for the trivial ones (like physical connection was lost, the MySQL server or the mysql server machine where it runs has crashed etc.) there are a few reasons for this that are very common in our experience and a lot of those mentioned are not. Here we will discuss one situation that to our experience happens very frequently for people working across multiple servers. The situation is that if a client sends mysql server has a SQL-statement longer than the server max_allowed_packet setting, the server will simply disconnect the client. Next query from the same client instance will find that the ‘MySQL server has gone away'. At least it is like that with recent server versions. 1) But the documentation at http://dev.mysql.com/doc/refman/5.1/en/error-messages-client.html .. also lists another client error: Error: 2020 (CR_NET_PACKET_TOO_LARGE) Message: Got packet bigger than ‘max_allowed_packet' bytes along with Error: 2006 (CR_SERVER_GONE_ERROR): Message: MySQL server has gone away. Actually I have not seen the ‘got packet bigger ..' error myself for many years. Not since MySQL 3.23 or 4.0. I am uncertain if a recent server will sometimes still return ‘got packet bigger' or not or if also this error message itself has ‘gone away'. If the ‘got packet bigger' message is still relevant with recent servers it would be nice to have it specified under what conditions it occurs and when only ‘gone away' will. If this error mesage is now ‘historical' it should at least be removed
Quotes Presentations Experience 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 You are here: Home / Technologies / Databases / SQLSTATE[HY000]: General error: 2006 MySQL server has gone awaySQLSTATE[HY000]: General error: 2006 MySQL server has gone away January 2, 2013 by ronald This would have to be one of the most common MySQL error messages that is misleading to the end user developer. The MySQL Manual page confirms the broad range of possible conditions, but offers little to a PHP developer that does not speak MySQL Geek. I am commonly asked to help solve this issue from a developer. The problem is that there are several conditions that can cause this error, and a more meaningful explanation to the end user would help in addressing the issue. In general terms, this actually means "Your SQL statement has failed because the connection to the database has been disconnected because of ???". Here are a few common situations and how to check for what "???" is. 1. Your MySQL server really did go away. We can easily check this by looking at the server uptime and the server error log. $ mysql -uroot -p -e "show global status like 'uptime';" +---------------+-------+ | Variable_name | Value | +---------------+-------+ | Uptime | 68928 | +---------------+-------+ 1 row in set (0.04 sec) $ tail /var/log/mysql/error.log 130101 22:22:30 InnoDB: Initializing buffer pool, size = 256.0M 130101 22:22:30 InnoDB: Completed initialization of buffer pool 130101 22:22:30 InnoDB: highest supported file format is Barracuda. 130101 22:22:30 InnoDB: 1.1.8 started; log sequence number 63444325509 130101 22:22:30 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306 130101 22:22:30 [Note] - '127.0.0.1' resolves to '127.0.0.1'; 130101 22:22:30 [Note] Server socket created on IP: '127.0.0.1'. 130101 22:22:30 [Note] Event Scheduler: Loaded 0 events 130101 22:22:30 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.28-cll' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server (GPL) In both these cases, the server has been up some time, and there are zero error messages to indicate problems. If the MySQL server did go away, was it shutdown