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ECLIPSE FOR MAC JDBC SQL DRIVER
ECLIPSE FOR MAC JDBC SQL CODE
ECLIPSE FOR MAC JDBC SQL PASSWORD
ECLIPSE FOR MAC JDBC SQL DOWNLOAD

SQLException : The server timezone value ' UTC ' is unrecognized or represents more than one timezone. Build Path > Configure Build Path > Libraries > Add External Jars > browse to folder containing the driver(mysql-connector-java-8.0.15.jar).

ECLIPSE FOR MAC JDBC SQL DRIVER

Set up mySQL JDBC Driver on Eclipse Referenced Libraries.

ECLIPSE FOR MAC JDBC SQL DOWNLOAD

download MAMP for mac or WAMP for windows.

connection mySQL with Java via phpMyAdmin.

ECLIPSE FOR MAC JDBC SQL CODE

But If you take this error after several successful interaction to the database, the problem might be with number of connections and you may think about changing "wait_timeout" and other MySQL settings or rewrite your code how that reduce number of connections.DBMS: Database Management System - mySql, Oracle, PostgreSQL, RDBMS, Microsoft Access, etc If you take this error at the beginning of the program and you are not able to connect to the database at all, you might have problem in your connection string. I suggest you to think about your own situation and choose above solutions. There is no simple and unique way to solve this problem. It solved my problem and also increased my speed dramatically. Then every time I just used that connection. What I did was that I defined my connection variable as a public (or private) variable for whole class and initialized it in the constructor. Although I closed the connection every time, but the system faced with many connections and gave me that error. Each time I created connection and then closed it. My problem was that I had many SELECTs on database. Because there are some people how solved their problem with following these steps. Use validationQuery="select now()" to make sure each query has responsesĪdd this code to your connection string: &autoReconnect=true&failOverReadOnly=false&maxReconnects=10Īlthough non of these solutions worked for me, I suggest you to try them. So it will not help to solve this error.Ĭhange TOMCAT6_SECURITY=yes to TOMCAT6_SECURITY=no " max_allowed_packet" is a variable in MySQL config file that indicates the maximum packet size, not the maximum number of packets.

test different JDK and JREs (like JDK 6 and 7).

ECLIPSE FOR MAC JDBC SQL PASSWORD

Try to replace "localhost" with your port, like 127.0.0.1.Īlso try to add port number to your connection string, like: String connectionString = "jdbc:mysql://localhost:3306/my_database?user=root&password=Pass&useUnicode=true&characterEncoding=UTF-8" ĭon't forget to change username and password to the username and password of your MySQL server. All the connection string should be continues without any space characters. Make sure you don't have spaces in your string. String connectionString = "jdbc:mysql://localhost/" + dbName + "?user=" + dbUserName + "&password=" + dbPassword + "&useUnicode=true&characterEncoding=UTF-8" your connection string should be some thing like this: dbName = "my_database" Make sure the Fire wall, or Anti virus soft wares don't block MySQL service.Ĭheck your query string.

change "wait_timeout" and "interactive_timeout"Īdd these lines to the MySQL config file:.

If there is a "skip-networking" line in your MySQL config file, make it comment by adding "#" sign at the beginning of that line. Uncomment "bind-address" attribute or change it to one of the following Ips: Windows: D:\Program Files\mysql\bin\my.ini Point: For the solutions that you need to change the MySQL settings, you can refer to the following not: Here are the solutions that I found on the internet and for each of them, there is at least on person who his problem has been solved with that solution. So I suggest you to try all the solutions one by one and don't give up! Maybe the problem is because of the wrong query string or too many connections to the database. It seems this error can occur generally when there is a problem in connecting to the server. While I was seeking the internet to find the solution for this error, I figured out that there are many solutions that worked for at least one person, but others say that it doesn't work for them! why there are many approaches to this error? I'll try to tell you about different approaches and sum them up here. Finally I changed my code and found out what was the problem. I have tested many approaches that have been mentioned in different web sites, but non of them worked. The driver has not received any packets from the server. The last packet sent successfully to the server was 0 milliseconds ago. My error was this: .jdbc4.CommunicationsException: Communications link failure I have had the same problem in two of my programs.