I am getting this error on my Joomla site.
Please note:
I have checked configuration file and there is no error in it.
I get this error few times a day. Without making any change it gets connected and some time this error appears.
Can someone please help in this.
Thanks
Dani
This happens when the MySQL server is overloaded, and so it stops responding. If you are on a shared hosting, then you should ask to be moved to a less crowded server. If you are on a VPS (with a fair use policy) or on a dedicated server, then you should enable and check the slow query log for the slow queries causing your MySQL server to crash.
Related
Recently, from few weeks ago I got err_connection_timed_out just sometimes while working with my website.
and i am sure, my users get this error too.
When i see at error log, there are a few of message like below
PHP Warning:mysqli_connect(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock
I changed 'localhost' to '127.0.0.1' for TCP connection instead of Unix socket, but no success.
My server host admin do not accept any problem at server side (like always!).
I asked them to restart Mysql, but they do not accept because it is a share server.
It is a Directadmin server and they recommend switch to Cpanel as the last chance.
Do you have any experience and solution for this problem?
EDIT: The main problem is err_connection_timed_out which i get in browser and i don't know if it relates to Mysql connection error in log file.
Switching might have positive effects because it's differently setup.
But if it happens sometimes it is probably the MYSQL server is burping.
Lately it's normal that the services has limit per user; so you can try to enable cache (of that is possible); to see whether it's less frequent (might be some queries that is running long).
do you have any cronjobs running or other processes around the time you receive those errors?
Normally this problem is caused due to MySQL server timing-out database connections is faster than the Stash connection pool can notice. This exhausts the Stash connection pool as it will keep its connections open while the MySQL side of the connections is already closed.
Easiest solution.
You can fix it by simply change this parameter (wait_timeout) at the Mysql config.
More difficult but better
Also you can close all connections in your code after you got the values. And finally you can change your connection to your database in order to reuse an existing connections.
And last but not least
Try a vps you got out there too many oferts, even for free. You wouldn't be able to change anything in a shared host sorry. :(
I'm using mysqli connection over ssl,
so using in code following:
$mdbconnection = mysqli_init();
$mdbconnection->ssl_set('/ssl/xyz.pem', '/ssl/abc-cert.pem', NULL, NULL, 'AES256-SHA');
$mdbconnection->real_connect(SV_SERVER, SV_MYSQL_LOGIN, SV_MYSQL_PASSWORD, SV_MYSQL_DATABASE);
I noted down that I am not able to connect over mysql server all the time.
if trying 100 times failing 3 time.
and getting following error
echo($mdbconnection->connect_errno);
printing:
2003
and if I am trying second time after failing it{echo($mdbconnection->connect_errno);} will give always 1045.
I am trying to solve this bug.
Any ideas would be appreciated.
The 2003 error code means the connection couldn't be established:
https://dev.mysql.com/doc/refman/5.5/en/error-messages-client.html
Error code 1045 means the client connected but the server rejected the credentials (access denied):
https://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html
I'd say that if you're getting the 2003 error code a few times out of every 100 tries, it sounds like some of the possibilities could be:
Some intermediate application or piece of hardware might be seeing your attempts as a possible flood attack (DDoS) and could be intercepting and blocking the connection (if you're connecting 100 times really quickly)
You might have some network stability issues on the client side. It might be worth the time to run Wireshark and reproduce the problem with it running in order to capture the problem and see if it shows anything significant (e.g. DNS failure).
The MySQL server might be crashing and then restarting. Check your server-side MySQL error log (https://dev.mysql.com/doc/refman/5.7/en/error-log.html). Actually, you should really do this as a first step any time you have bizarre behavior in MySQL.
If the MySQL server log doesn't show anything, check your system logs, especially if you're logging anything like blocked firewall (iptables or whatever f/w you're using) packets and search them for your client IP around the time of the problem.
Finally, if you can reproduce this easily/quickly (e.g. make 100 connections via a script and see it fail), try eliminating SSL out of the equation and connecting without SSL and see if it gives you the same problem. If it works flawlessly without SSL, perhaps there's a problem with the SSL library that was used during the compilation of your MySQL package.
You might also want to check to see if you have any load-balancing in place that might make your script connect to different instances of the MySQL server (this is less likely, but could explain the symptoms you're seeing if one server is down and the next doesn't have the credentials you're providing)
Recently few days I run into a weird problem of php not able to connect to mysql on RDS, while manual connections are fine.
So I have several php scripts sitting on our server which is hosted on EC2, and these scripts are called by the clients to communicate with a mysql server sitting on RDS. The scripts are setup so that if any connection error occurs, they would send email notification to me.
So for the recent few days I'm receiving thousands of error emails from my scripts, at the first few days the errors were simple saying the server host is not recognized, but I am sure the address is correct. And now the errors are almost all saying "Host XXX is blocked because of many connection errors, unblock with mysqladmin flush-hosts..." If I flush the hosts, the errors come back to me after a while.
What confuses me the most is that, I cannot reproduce the problem! I tried connecting to the RDS server from my EC2 server through command line and through test php scripts... They all work! If I manually invoke the scripts sending me error emails, they work too! Looking at the RDS monitor, all stat looks normal, CPU is bouncing around 50%, and plenty of hard drive space.
So I'm totally confused right now... Can anyone provide me some insight about how to solve this problem? I don't even know where to look at now...
you need to check your connection to the mysql server and check for errors. Until then you can cron a "flush hosts" to temporary fix the issue. Be aware that this should be used only as a temporary fix.
I am using joomla 1.5, and my site was running fine, but suddenly couple of days back I got the error Database Error: Unable to connect to the database:Could not connect to MySQL
Its not always, the error is coming. Sometimes the error is coming, and sometimes not. If I have wrong database connection values, then why, is the site coming perfect sometimes. I double checked my database connection values, and are completely fine.
Try http://www.scholarsmarket.com/beta/top-ranked-students this link. Refresh this couple of times. You will get the problem
I am stuck with this error. Can't get out of this.
It a very common issue to tell exact reason, I think you should start from asking your hosting support about any limitations e.g. Database connections?
then take a look at the logs and statistics - probably you site suddenly got too much visitors at that time?
If this error seems to pop up 'randomly' it's usually because either persistent connections are used (or another reason why the connection goes into sleep mode for some time). Persistent connections are generally not a good idea on medium- to high-traffic sites, since it clogs up your database with 'sleeping' connections. Once those connections hit the maximum connection account for your database user, the MySQL server will reject any new connections and throw the error you are seeing.
So, in order to fix this problem, make sure your db config is not set to use persistent connections. You can also verify if this is the problem by running this query on your database (given that you have the proper permissions to do so):
SHOW PROCESSLIST;
i have one wordpress blog name as
http://shareprogrammingtips.com/
its hosted on hostgator and works fine. But suddendly i am getting error like
Database Error:
Error establishing a database connection
when i open my blog.
i have not done anything with php my admin of my webspace. i havent touch any setting still i am getting this.
why this error comes and how can i remove that ?
Chances are there is an issue with one of the following:
The database server is down (try connecting via a MySQL client such as PHPMyAdmin or the MySQL admin tools http://dev.mysql.com/downloads/gui-tools/5.0.html)
Incorrect username/password
Your username/password is correct however you don't have permission to connect from your current hostname (e.g. database only allows local connections).
You specified a database table that does not exist.
If you have't changed anything in the site wp-config.php or in Wordpress at all, it's probably nothing more than a temporary glitch at your webhost. Open a ticket with them.
Hostgator places a limit that database can consume only 25% of total memory assigned to a hosting account. You have mysql server going away that crashed your server.Kind of "Memory Issues" if it is repeatedly occuring the hostgator support will finally ask you to upgrade