I have a dedicated root server with CentOS and Apache Tomcat 7.
The Servlet in Tomcat7 works well, but dont get a connection/data from the database.
On my local system with eclipse it worked well. I exported the database from my local system and imported it with phpmyadmin on the server.
Same username, same passwort.
As host ive tried
final String host = "jdbc:mysql://localhost/table"; and
final String host = "jdbc:mysql://localhost:3306/table";
What could be the Problem? I dont know what to do.
This java.lang.ClassNotFoundException: com.mysql.jdbc.Driver is when you dont have the mysql-connector-java.jar in your classpath Download one fron here and put it in the classpath
Related
On machine1, I installed apache tomcat 7 listening on port 9999 and copied a sample.html file in ../webapps/dummy folder of tomcat machine.I was able to access the resource with URL http://localhost:9999/dummy/sample.html
On machine2, Tomcat is already part of some product listening on port 8080 which i thought of utilising it for my sample test. So, I copied a sample.html file in ../webapps/dummy folder of tomcat machine. I was unable to access the resource with URL http://localhost:8080/dummy/sample.html
On machine2, I have existing servlet programming modules running in another folder ../webapps/xyz.
My question:
I am trying to understand, What are the list of things that i need to verify on machine, which let me know, why i have an issue in accessing the URL(above) on machine2? Is this something to do with http access configuration like basic.user/basic.groups file?
It has nothing to do with the port on which tomcat is running.
Did you restart Tomcat after copying file over? It might be that on machine2 it's not configured to run in a dev mode so it doesn't pick up changes at runtime.
or
(if this is linux/unix/mac computer) Tomcat on machine2 is running as tomcat:tomcat user, but file you copied can't be read by this user. Change the permissions of the file.
HTH,
Jan
I have installed Hadoop & connected with Hadoop locally successful. I can connect the Sqoop via REST api and via cli interface.
But once I want to start creating a job for important data from MySQL. It shows
Connection configuration Warning message: Can't connect to the
database with given credentials: No suitable driver found for
jdbc:mysql://127.0.0.1:3306/for
Error message: Can't load specified driver
after google its solution, I has already
put the mysql-connector.jar to sqoop web lib folder
create a lib folder under the sqoop folder and put the mysql-connector.jar in it
I also have restarted or even reboot my VM. It still says cannot load specified driver.
Is there any config files I have missed to set? Thank you!
My ENV:
VirtualBox + Vagrant + Ubuntu 12.04
JDK (Sun Distrubution 1.7_update 51)
Hadoop 2.2.0 (complied version)
Sqoop 1.99.3 (complied version)
Thank again!
check your 'JDBC Driver Class' of the connection you just created in sqoop,it should be setted
as com.mysql.jdbc.Driver.
If still not work,put mysql-connector-java-3.1.12-bin.jar into $SQOOP_HOME/server/lib
I've inherited a project (and I have absolutly no experience of Java) and I'm rather stuck.
We have a server running redhat, which I needed to update one of the jar files. So I simply copied up the updated file and restarted the service for that file. However this process has worked on our other server I did that too but on this one it comes up with the below in the log file.
Exception: com.mysql.jdbc.Driver
SQLException: No suitable driver found for jdbc:mysql://localhost:3306/dbanme
The jar files are uploaded to a folder in the root of the website and within that jar folder is a lib folder where mysql-connector-java-5.1.6-bin.jar is located.
Does anyone know what I could be missing as I'm a newbie to linux aswell.
Thanks in advance
java.sql.SQLException: No suitable driver found
This exception can have 2 causes:
The JDBC driver is not loaded at all.
URL does not match any of the loaded JDBC drivers.
Since the driver seems to be loaded , it look like that the URL is not valid on that machine:
jdbc:mysql://localhost:3306/dbname
Do you have mysql running and listening on port 3306 on that machine. Also make sure you hte schema dbname there.
You need only set that:
[jdbc:mysql://localhost/dbanme]
instead of
[jdbc:mysql://localhost:3306/dbanme]
Because java compiler default understand a port 3306, so no need to fill "3306" after "localhost:"
we are working on java technology and we have created enterprise application in java. we also created the instances on amazon aws. we have the following hosts for our web enterpeise application on amazon
SERVER AMAZON= ec2-54-235-50-8.compute-1.amazonaws.com
MYSQL= mysqld#ec2-23-23-65-23.compute-1.amazonaws.com
we have created the JDBC connection pool on glassfish as follows
when i ping the jdbc connetction pool it is giving the following exception "Class Name is wrong or class path is not set for com.mysql.jdbc.MySqlDataSource".
Try this:
cd ./glassfish3/glassfish/domain/domainl/lib
wget http://mysql.llarian.net/Downloads/Connector-J/mysql-connector-java-5.1.18.zip
unzip mysql-connector-java-5.1.18.zip
mv ./glassfish3/glassfish/domain/domainl/lib/mysql-connector-java-5.1.18/mysql-connector-java-5.1.18-bin.jar ./glassfish3/glassfish/domain/domainl/lib
By this u will get mysql-coonector-java.jar file in lib folder.
is mysql connector should be in your glassfish domain lib dir. It seems glassfish cannot find it.
glassfish-install-dir\glassfish\domains\domain1\lib
I have a Java application, which uses Apache Derby. Using Eclipse Export option, I exported it as JAR file. When I am running Eclipse, and the server is connected to port 1527, the JAR executes correctly.
However when eclipse is closed, (and the server is not connected to 1527) on executing jar, i get this error
java.sql.SQLNonTransientConnectionException: java.net.ConnectException
: Error connecting to server localhost on port 1527 with message
Connection refused.
This is understandable. But i want to distribute the JAR. So is there a way to start the server programmatically, whenever JAR is executed?
You can start the NetworkServer programmatically:
NetworkServerControl serverControl = new NetworkServerControl(InetAddress.getByName("myhost"),1621)
serverControl.shutdown();
Simplest is to use embedded Derby
Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
conn = DriverManager.getConnection("jdbc:derby:" + DATA_STORE + ";create=true");
You need to start the server programmatically.
How this is done is documented in the manual:
http://db.apache.org/derby/docs/10.8/adminguide/tadminconfig814963.html