I wrote java class to connect mysql database and insert data to database on my centos installed pc.(this java file called by asterisk program using AGI). but I got below exception at runtime.
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
How could I solve this ?
Ok. I solved my question. when I run the asterisk program with AGI server, I added mysql connector classpath as below.
java -classpath asterisk-java-0.3.jar:mysql-connector-java-5.1.18-bin.jar:. org.asteriskjava.fastagi.DefaultAgiServer
you need this jar file: mysql-connector-java-{version}.jar
e.g.
http://findjar.com/jar/mysql/mysql-connector-java/5.1.9/mysql-connector-java-5.1.9.jar.html
Related
I have installed Hive and mysql successfully, i did the configuration for Hive as suggested in link. But i see an error as below:
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
..
..
Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the "BONECP" plugin to create a ConnectionPool gave an error : The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.
so i added the mysql-connector-java.jar in lib of Hive. Now hive just hangs, i dont get the shell at all.
Kindly suggest how i can resolve it
You need to add mysql connector to the classpath in the hive. It is looking for that connector in your classpath and its not able to find it. Download mysql connector and put it to the following path
/usr/lib/hive/apache-hive-0.13.0-bin/lib
I am getting the below error when i am trying to connect to my database.
Exception in thread "main" java.lang.NoClassDefFoundError: java.util.concurrent.ConcurrentHashMap
at com.mysql.jdbc.NonRegisteringDriver.<clinit>(NonRegisteringDriver.java:83)
at java.lang.Class.initializeClass(libgcj.so.7rh)
at java.lang.Class.initializeClass(libgcj.so.7rh)
at java.lang.Class.forName(libgcj.so.7rh)
at java.lang.Class.forName(libgcj.so.7rh)
at test.main(test.java:14)
Information :
Platform : RHEL 5
Java : jdk1.6.0_45
jdbc connector : mysql-connector-java-5.1.26-bin.jar
Sever: Tomcat 6
I have placed the jdbc connector inside usr/share/java/ Directory.
and my program to test the connection is placed in the root folder.
I have set the CLASSPATH to point to the connector using EXPORT command.
and I am using javac filename.java command to compile & java filename to run it.
A JDBC driver doesn't need to be installed or configured. You download the jar, add it to the runtime classpath of your application, and you're done:
java -cp someJar.jar:someDirectory:theMySQLJdbcDriver.jar com.foo.bar.Main
I have installed the old version of mysql connector which was compatible with RHEL5
and now its working fine.
Thanks !!
I would like to use springMVC and JPA (using hibernate) on my tomcat 7 server (running locally on my Mac).
I was able to set up everything successfully with an embedded H2 database.
Now I switched to mysql and am getting the following error
java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
This suggests tomcat is having trouble finding the mysql-connector for java.
There are a multitude of tutorials on how to add the connector to $CATALINA_HOME/lib.
After trying to use a maven dependency for my project, I followed the advice and copied the .jar file into the lib directory:
$ ls $CATALINA_HOME/lib/mysql*.jar
/Users/david/Applications/tomcat/lib/mysql-connector-java-5.1.20-bin.jar
I have read and execute permissions on the directory and file.
At the moment I can't figure out how to make tomcat aware of the jar. The folder is included in
$CATALINA_HOME/conf/catalina.properties
and I have restarted the server multiple times.
Thanks for you help.
Normally, the output of a CNFE is as follows:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
whereas your error message shows
java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"
I think you've still got quotes around the driver class name in your config.
Whenever I try (My)SQL queries on the sever (the server is in debug mode in Eclipse) I get this error:
SEVERE: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
Now I can't recall how I got this detail, but I suspect that the following info is relevant:
with %MyWorkspace% being some path like x:\some_path, this path:
%MyWorkspace%\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\rewardy\WEB-INF\lib
contains the mysql-connector-java-5.1.13-bin.jar file, that if I'm not wrong has the com.mysql.jdbc.Driver class that it looks for (am I right ?...)
I use this config: Win7 x64, Eclipse Helios Service Release 2, WAMP Server and Tomcat 6.0.26.
You should have to add location of mysql-connector-java-5.1.13-bin.jar via project properties + Java Build Path + Add External Jars (Eclipse IDE)
have you mysql-connector-java-5.1.13-bin.jar in classpath or in libs/ on tomcat ? – triclosan
Thanks #triclosan, I put it in Tomcat/lib and it works now!
I'm swapping out a derby database for a MySQL one. I had everything working before but after what I thought was the proper configuration I'm getting the error:
Caused by: javax.resource.ResourceException: Class name is wrong or classpath is not set for : com.mysql.jdbc.jdbc2.optional.MysqlDataSource
Full error output from console:
Caused by: javax.resource.ResourceException: Class name is wrong or classpath is not set for : com.mysql.jdbc.jdbc2.optional.MysqlDataSource
at com.sun.gjc.common.DataSourceObjectBuilder.getDataSourceObject(DataSourceObjectBuilder.java:292)
at com.sun.gjc.common.DataSourceObjectBuilder.constructDataSourceObject(DataSourceObjectBuilder.java:114)
at com.sun.gjc.spi.ManagedConnectionFactory.getDataSource(ManagedConnectionFactory.java:1292)
at com.sun.gjc.spi.DSManagedConnectionFactory.getDataSource(DSManagedConnectionFactory.java:148)
at com.sun.gjc.spi.DSManagedConnectionFactory.createManagedConnection(DSManagedConnectionFactory.java:101)
at com.sun.enterprise.resource.allocator.LocalTxConnectorAllocator.createResource(LocalTxConnectorAllocator.java:87)
I've double checked some of the names, the connection pool and other resources.I've also added the MySQL driver .jars to the library of glassfish in both projects. The database was definitely working correctly through eclipse because I was able to view tables and display the resources inside the database context of eclipse. So I know that at least THOSE drivers are working correcly. Also the persistence.xml file looks good. it references the jdbc/mydatabase jndi reference like it should and default JTA is selected as the manament type.
Does anyone have another suggestion? Thank you
I've also added the MySQL driver .jars to the library of glassfish in both projects.
It was apparently not done right. The JAR has to go in /glassfish/domains/[domainname]/lib/ext folder of the Glassfish installation where [domainname] usually defaults to domain1. You can and should not configure it from the Eclipse side on.
Looks like I am replying very late, but however people who would be referring to this thread may find the following information being useful. So I am posting it here:
Download the connector Jar from http://dev.mysql.com/downloads/connector/j/5.0.html
unzip the pack and copy mysql-connector-java-verno-bin.jar
past the same at [GlassFish Installation Directory]/domains/[domain name]/lib folder
restart your domain and ping to check your connection in JDBC Connection Pools
There you go. If your MySql is running then it will ping the DB successfully
I copied the jar file to $glassfish_install_folder\glassfish\lib, after that it worked. I use glassfish 4.0.
Check this link from oracle.
I encountered this issue in 2018 and would like to note that if you are using glassfish 4 (current is 5) then it seems you have to use the Connector/J 5.1.47 version for it to work. If you use the current version (Connector/J 8.0.13) then exception mentioned in the original question keeps appearing, no matter where you place the .jar file.
With Connector/J 5.1.47 it works perfectly.
Solution is
> asadmin add-library /path/to/mysql-connector-java-bin.jar
Check this link:
https://blog.payara.fish/using-mysql-with-payara
I encountered this issue in 2019 and would like to note that if you are using docker image payara/server-full (I am using 5.194 so far) as I do the location to place the driver jar is:
/opt/payara/appserver/glassfish/domains/production/lib/
In the end I am doing something like this in the Dockerfile of payara server:
RUN wget http://central.maven.org/maven2/org/mariadb/jdbc/mariadb-java-client/2.2.0/mariadb-java-client-2.2.0.jar \
-O /opt/payara/appserver/glassfish/domains/production/lib/mariadb-java-client-2.2.0.jar