We're using Lampp stack, PHP PDO, centos 7, MySQL 8. The database server and the MySQL server are different.
On long operations like file uploading, I get
SQLSTATE[HY000] [2002] Cannot assign requested address
Per this answer, I tried making the PDO connection persistent, didn't fix it. the other answer suggests increasing max open files in /etc/security/limits.conf but I didn't find that option in that file.
How to fix that error? does editing that file or any file requires a server restart? Because it's a production server, I need to notify the team should any of the solution require a server restart
Related
I'm running MySQL with DBngin and i get this error. It seems that laravel can't even connect to the database.
SQLSTATE[HY000] [2006] MySQL server has gone away
I saw that increasing the 'max_allowed_packet` the issue can be solved but i haven't found a way to do that in my case.
i downloaded mysql-client and after i connected to my database, i tried to set the max_allowed_packet
set global max_allowed_packet=16000000;
But for some reason it doesn't change, I checked that with
SHOW VARIABLES LIKE 'max_allowed_packet';
This can also be changed in the my.cnf file but because i am running MySQL with DBngin i couldn't find the configuration file. I know that i can set a custom configuration file in DBngin but i'm not sure what else i should include in that file besides the max_allowed_packet in order to make it work.
Any ideas ?
There have been a number of questions on this topic on Stackoverflow but not exactly my situation.
I have a MySQL server installed on my PC, which was working fine. We used to have a peer-to-peer network in the office. My PC was just named "MY-PC". Some change occurred to the network and my PC is now connected to a "proper" network, and the name of the PC has changed to "MY-PC.mycompanywebsite.co.uk".
Now every time I try to connect to MySQL it gives me the error:
#1130 - Host 'My-PC.mycompanywebsite.co.uk' is not allowed to connect to this MySQL server
I can't log in using the command line tool or anything. Is there a config file setting I need to change to get this working?
By the way, this is a version of MySQL which came in an installation of WAMPServer, so I did not configure it myself.
I am continuously getting below error while connecting to mysql-
Can\'t connect to MySQL server on /ip/address
but mysql is not generating any log for this error. I have below entries in my.cnf file
log=/var/log/mysql_err.log
log-error=/var/log/mysql/mysql_error.log
I am using correct credentials. No issue of conections.
Now how will I determine the exact issue If I'll not get any log ?
Any Idea, how to solve this ?
This is not surprising:
the server can only log an incident it is aware of. However your client does not even reach the server at all! So how should the server know some client has attempted to contact it?
The error message you get clearly indicates that you do have a connection issue.
You can easily make a test to check the most common problems: just open a telnet connection from the system trying to connect to the system the sql server runs on, connect to the mysql port: telnet <ip-of-mysql-server> mysql
On typical unixoid systems "mysql" will be substituted by the "well known port number of mysql, which is 3306. otherwise you have to specify it manually. Do you get a connection at all? I would guess not. This means either the mysql server is not listening where expected (not running or configured otherwise) or the connection is blocked on network level (firewall).
I'm running a local copy of WordPress on XAMPP/WinXP for development, but would like to maintain a connection to the remote database. I keep getting "Error establishing database connection" no matter what I try.
On the same PC, I can connect to the remote mySQL DB using any number of mySQL clients, and on the mySQL side, the both the user and the database are set to accept incoming requests from any wildcard domain. I can also easily ping the remote database server from my PC (though I don't know how to do it from WITHIN XAMPP).
Is XAMPP its own little universe that can't reach through to the outside world? Or is there something I'm clearly overlooking that's not letting me connect?
Errors
Warning: mysql_connect() [function.mysql-connect]: Premature end of data (mysqlnd_wireprotocol.c:553) in C:\xampp\htdocs\dbtest.php on line 5
Warning: mysql_connect() [function.mysql-connect]: OK packet 1 bytes shorter than expected in C:\xampp\htdocs\dbtest.php on line 5
Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication
Edit
Thanks to #Michael for suggesting I just create a simple connection script so I can get better insight into the actual error that's being thrown. This revealed that it had to do with the old_password setting in mySQL. See my Answer below for a full description of how to resolve this issue.
Here's the test script I put inside my xampp\htdocs folder and tested out:
<?php
$mysqli = new mysqli('my.server.address', 'user_name', 'password', 'database_name');
if ($mysqli->connect_error){
die ("Connect error: " . $mysqli->connect_error );
}
I'm not really clear on why this became an issue on my XAMPP installation, since I'm also running PHP 5.3.x on the server's local box and wasn't experiencing those issues there. However, it has to do with my mySQL server running in "old password" encryption mode. Newer versions of PHP won't allow those kinds of connections, so you need to update your mySQL server to use the newer password encryption. Here are the steps, assuming you have control over the mySQL server. If you don't, that falls out of the scope of my knowledge.
locate the configuration file for the mysql server called my.cnf. I found mine at /etc/my.cnf. You can edit it with sudo nano /etc/my.cnf
Look for a line that says old_passwords=1 and change that to old_passwords=0. You have now told the server that the next time it is run, and it is asked to encrypt a password using the PASSWORD() command, it use the new 41-character encryption rather than the 16-character 'old' style encryption
Now you have to restart your mysql server / service. YMMV, but on Fedora that was easily done with sudo service mysqld restart. Check your OS' instructions for restarting the mysql daemon or service
Now we have to actually edit our user table within mysql. So open up an interactive shell to mysql (on the server you can type mysql -uYourRootUsername -pYourRootPassword)
Change to the mysql database. This is the database that holds all the good stuff for server operation and authentication. You must have root access to work with this database. If you get an 'access denied' you're SOL. Sorry. use mysql; will switch to that database
Now we want to update the user that was giving you grief. Ultimately you'll probably want to update all your users, but for now, we're just focusing on the user that threw the error. update user set Password=password('YOUR_PASSWORD') where User='YOUR_USERNAME';
Now you just need to tell mysql to use the new password for authentication when that user attempts to connect. flush privileges;.
You should be good to go!
I am trying to connect to a MySQL database using the mysql_connect() command however I keep getting the error message:
Warning: mysql_connect() [function.mysql-connect]: [2002] A connection attempt failed because the connected party did not (trying to connect via tcp://ravenwolftest.db.4292619.hostedresource.com:3306) in C:\Data\GITA\Web Design\Projects\Ravenwolf\LoginTest.php on line 12
Warning: mysql_connect() [function.mysql-connect]: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. in C:\Data\GITA\Web Design\Projects\Ravenwolf\LoginTest.php on line 12
I searched around in the phpBB folder and found in the config.php folder there was listed a host name, username, and password. I put those into the mysql_connect() line but get the same error. I am also using godaddy.com for web hosting in case that means anything. As for the code itself all I have is:
mysql_connect('ravenwolftest.db.4292619.hostedresource.com','ravenwolftest','password');
Thanks in advance for any help.
it seems that either the other server is down or does not allow external connections to the database.
i would suggest that you enable external access in your godaddy control panel
Do you control the machine ravenwolftest.db.4292619.hostedresource.com? Is MySQL running on it? If it's not your local machine, have you verified that MySQL is permitting connections from your machine?