I'm trying to open a connection from my NetBeans IDE to my remote MySQL database. I've put in what I think is the correct parameters in the response fields but when I try to test the connection it gives me this error message:
Cannot establish a connection to
jdbc:mysql://198.136.54.104:3306/myedigit_FirstDb?zeroDateTimeBehavior=convertToNull
using com.mysql.jdbc.Driver
Communications link failure
The last packet sent successfully to the server was 0 milliseconds
ago. The driver has not received any packets from the server.
Please let me know if you need any more information I'll be happy to provide it.
Your host may not allowing remote connection.
You may need to add Access Host by Login into your host server and go to Remote MySql (I am referring GoDaddy)
You need to provide either your IP Address in host or % to access remotely from anywhere.
Related
I have made a program that connects with a remote database. I used a database on my web hosting as the database. Within previous months it works fine. But since yesterday, it shows errors:
Java:-
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
so I just try to check the connection on python, but it also gave me an error:
TimeoutError: [WinError 10060] 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
Also, I tried connecting to another remote database from the same code, It connects without any error. So what should I do next? plz help
Use DBveaver (enter link description here) client to connect to your database.
Test the connectivity then try to connect using code. This will help you to debug the issue easier.
I'm trying to connect to a MySQL database remotely, from a machine called pc.domain.com to a server called remotehost.domain.com
DriverManager.getConnection("jdbc:mysql://remotehost:3306", "user", "pass");
On the remote server I have the user 'user'#'pc.domain.com' (with appropriate permissions), but when I try to connect the following error occurs:
Host '128.0.200.82' is not allowed to connect to this MySQL server
I don't know if such validation is server or client side, although it makes more sense to be server sided. How can I force it to use the FQDN instead of the IP address to identify the connection?
Turned out to be a problem with the reverse lookup on my DNS.
I have a Java (Swing) desktop connected to a godaddy MySQL database (online database). Till the time database was offline, this was not at all the problem, but now I get this exception when I try to access some menu which involves a database access.
Also, I create a static connection object when my application start, and never close it when the application is running.
This is the description of Exception, please help if you can. Thanks :)
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link fai
lure
Last packet sent to the server was 47 ms ago.
SOME MORE STACK TRACE AND THEN THE CHAINED CAUSE
Caused by: java.io.EOFException: Can not read response from server. Expected to
read 4 bytes, read 0 bytes before connection was unexpectedly lost.
I am assuming that you are on a shared hosting. Connecting to such a hosting publicly is not advisable.
Dealing with the problem this seems a problem with Remote SQL. There are a few things you can do
1. Go to your cPanel or equivalent and navigate to Remote SQL add the address 0.0.0.0 which will allow connections from any public ip that may want to connect with it. If your are using a vpn like AWS you have to manually edit the my.cnf or my.ini depending on weather you are hosted on linux or windows, add
bind-address = 0.0.0.0
under the
[mysqld]
tag
Next you need to create a user which can be accessed from any ip as root user only has permission to be accessed locally
GRANT ALL ON yourdatabasename.* TO user#'%' IDENTIFIED BY 'yourRootPassword';
Hi I am trying to connect through JDBC on an Advantage local server.
I have tested many connections strings, like for example:
connection = DriverManager.getConnection(
"jdbc:extendedsystems:advantage://localhost:6262;catalog=C:\\bdl\\database\\BDL.add;TableType=cdx;LockType=proprietary", "adssys", "no");
I am searching for over three days now. I am getting always the error message connection refused. I only want to connect and access the files , and not on any advanced database server. I have now idea any more.
The ADS JDBC driver doesn't support ALS (Advantage Local Server), you have to install an actual ADS server.
http://devzone.advantagedatabase.com/dz/webhelp/Advantage10.1/devguide_ads_and_java_1.htm
If you have a running ADS server make sure there is no firewall that blocks traffic on port 6262 (or whatever port you're using).
I need to connect to a mysql database across a network.
The connection string ive given is
"jdbc:mysql://host/dbname"
i can access the site across the network but the only problem is with the java database connection.
Ive updated the phpmyadmin.conf file giving
# Deny from all
Allow from all
But still the database connection cannot be made.
Please help me..
I don't know much aboud phpmyadmin, but what I did to configure a remote db:
The connection string is: jdbc:mysql://host:port/dbname
The port is 3306 by default
The mysql user is often name#localhost, you need to configure a user for the remote (client) machine (IP address, hostname, wildcard)
HTH
Ok, there are few things you need to check ...
1) If your database got username/password
2) Have you restarted your server after altering phpmyadmin.conf?
3) Make sure you are connecting to the correct port. Ex: mysql://host:port/dbname (if port differs from default.
4) make sure that the PC that have the DB allows incoming connections through the port.
If you still facing problems, try disabling your antivirus/firewall on the PC that have the DM and try.