In admin properties, the paths are correct but, this error always appears whenever I try to connect to MySQL server from NetBeans.
Unable to connect to the MySQl server:
org.netbeans.api.db.explorer.DatabaseException:Cannot establish a connection to jdbc:mysql://localhost:3306 for user root"
You need to install Download Connector/J (This is the official JDBC driver for MySQL.)
Official Download Page: http://dev.mysql.com/downloads/connector/j/
Related
I have created a db in AWS in my root account but when i wanted to connect it from my local Squirrel i am getting below shown error.
Steps i follwed were
create aws Databse(Mysql)
downloaded jdbc mysql driver and added to squirrel
created an Alias to test connection by giving all required content when i am testing it it gives below error
enter image description here
I am trying to connect to my database remotely:
connection = DriverManager.getConnection(URL);
URL is of following format (all XXX values copied from Heroku's website):
jdbc:postgresql://XXX:XXX/XXXX?sslmode=require&user=XXX&password=XXXXX
I am getting:
org.postgresql.util.PSQLException: FATAL: no pg_hba.conf entry for host "213......, SSL off
I had run (it didn't change "SSL off" status):
heroku config:set PGSSLMODE=require --app XXXXXX
and even added this to the URL as suggested in older posts (althought I didn't see any of it in Heroku's doc):
sslfactory=org.postgresql.ssl.NonValidatingFactory
Make sure you are using PG JDBC client 9.4 or higher. Your JDBC connection URL will need to include the URL param:
sslmode=require
For example:
jdbc:postgresql://<host>:<port>/<dbname>?sslmode=require&user=<username>&password=<password>
For more info see Heroku docs on Connecting to a database remotely.
This is error stack trace i am getting...
Could not connect to mydb.
Error creating SQL Model Connection connection to mydb. (Error: oracle.jdbc.OracleDriver)
oracle.jdbc.OracleDriver
Error creating JDBC Connection connection to mydb. (Error: oracle.jdbc.OracleDriver)
oracle.jdbc.OracleDriver.
I am using oracle thin driver to connect to database..
SID: db
Host: localhost
Port number 1521
User name: system
Password:
Connection URL: jdbc:oraclethin:©lccalhost:1521:db
I can't even able to ping the database...
There is a typo in your connection URL. It says lccalhost instead of localhost. Try:
jdbc:oraclethin:©localhost:1521:db
Furthermore, your log says mydb instead of db as stated in your connection settings. So, this may be another possible cause of fault.
I think you are using xpress edition 11-g and if so then try changing the SID from db to xe and then it should work fine .
If you are using the standard edition then you must check with the odbc jars .
Try adding odbc6 jar
I'm unable to connect to db2 server using db2cmd command
db2 connect to mydb user myuser using password
Getting the following message
SQL8002N An attempt to connect to a host failed due to a missing DB2 Connect product or invalid license. SQLSTATE=42968
But I have successfully connected to this database using jdbc and I can view the structure.
Has anybody experienced such issue?
Are you trying to connect to a iSeries o z/390? or just a LUW (Linux, Unix Windows?)
If you are trying to connect to one of the two first, you need a DB2 Connect license, because they use the DRDA architecture, and it uses a special license.
Check the license
db2licm -a
If you are trying to connect to a LUW, you do not need any DB2 connect license, but probably there is a problem in you cataloged databases. Check the
db2 list node diretory
db2 list db directory
Is the database a remote server or is it a local connection?
Also, try to attach to the remote instance, in order to check that the node catalog is right
db2 attach to remoteInstance
As the error message says, you need DB2 Connect to serve as a gateway for CLI connections. The JDBC driver does not need the gateway, as it implements the required protocol.
I've tryed to create a connection with a Microsoft SQl Server 2008 database through JDBC on Eclipse SDK. I've dowloaded JDBC driver from microsoft and I've installed it, then I've added at my System environment variables CLASSPATH the path of sqljdbc4.jar file. After icluding in the Eclipse project the jar file I've tryed to create the connection using:
String connectionUrl = "jdbc:sqlserver://localhost;integratedSecurity=true";
Connection con = DriverManager.getConnection(connectionUrl);
but it doesn't works, and launch me this exception:
com.microsoft.sqlserver.jdbc.SQLServerException: TCP/IP connection
at host localhost, port 1433 failed. Error: "Connection refused:
connect. Verify connection properties and make sure an instance of SQL
Server is running on the host and is accepting TCP/IP connections at
the port. Be sure no firewall blocks connections at the port.
I'm working on a JRE 1.6 so a sqljdbc4 should work, and I've created a working ODBC, so the server is responding, and the error should be in java command or JDBC installation.
Can anyone help me?
At the risk of stating the obvious, this looks to me as if TCP connections haven't been enabled on SQL Server. You have to manually enable them, they don't come enabled by default.
There's an article on MSDN here which explains how to enable TCP protocols for SQL 2005/2008.
Following are the quick trouble shooters:
Try to connect to your server using external front end.
Check if your firewall blocks the connection to the port
Check to see if server is really up.
A Suggestion :
If you are using eclipse , you don't need to add the jar into CLASSPATH variable , you can just add it in library of your project to make it available at runtime