Sz Krze [https://community.jboss.org/people/krzemian] created the discussion "Can't connect to MySQL in Java EE/JBoss application" To view the discussion, visit: https://community.jboss.org/message/757495#757495 -------------------------------------------------------------- While deploying my app I'm getting the following errors (I've also included subjectively significant warnings):     03:36:42,113 WARN  [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null: org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}))     (...)     Caused by: org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar})     (..)     Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}     03:36:42,122 WARN  [org.hibernate.cfg.SettingsFactory] Could not obtain connection to query metadata: org.jboss.util.NestedSQLException: Unable to get managed connection for MP01Local; - nested throwable: (javax.resource.ResourceException: Unable to get managed connection for MP01Local)     (...)     Caused by: javax.resource.ResourceException: Unable to get managed connection for MP01Local     (...)     Caused by: org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}))     (...)     Caused by: org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar})     (...)     Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}     03:36:42,143 WARN  [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null: org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}))     (...)     Caused by: org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar})     (...)     Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}     03:36:42,147 ERROR [org.hibernate.tool.hbm2ddl.SchemaExport] schema export unsuccessful: org.jboss.util.NestedSQLException: Unable to get managed connection for MP01Local; - nested throwable: (javax.resource.ResourceException: Unable to get managed connection for MP01Local)     (...)     Caused by: javax.resource.ResourceException: Unable to get managed connection for MP01Local     (...)     Caused by: org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar}))     (...)     Caused by: org.jboss.resource.JBossResourceException: Failed to register driver for: com.mysql.jdbc.Driver; - nested throwable: (java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar})     (...)     Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver from BaseClassLoader@66a8c396{vfs:///D:/MobilnyPodroznik/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1345902635716/deploy/MP01.jar} As for the whole console output: http://pastebin.com/de2Br9xL http://pastebin.com/de2Br9xL *Basically, it seems as if my JDBC driver is not visible, but I have placed the .jar both in the server's default/lib folder and in project's build path, thus I'm clueless now.* *persistence.xml*     <?xml version="1.0" encoding="UTF-8"?>     <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"            xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"            version="2.0">       <persistence-unit name="mp" transaction-type="JTA">         <jta-data-source>java:/MP01Local</jta-data-source>                <properties>            <!--s            <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>            -->            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>            <property name="hibernate.hbm2ddl.auto" value="create-drop"/>        </properties>       </persistence-unit>     </persistence> *mysqllocal-ds.xml*     <?xml version="1.0" encoding="UTF-8"?>     <!DOCTYPE datasources         PUBLIC "-//JBoss//DTD JBOSS JCA Config 1.5//EN"         "http://www.jboss.org/j2ee/dtd/jboss-ds_1_5.dtd">     <datasources>        <local-tx-datasource>           <jndi-name>MP01Local</jndi-name>           <connection-url>jdbc:mysql://localhost:3306/mp</connection-url>           <driver-class>com.mysql.jdbc.Driver</driver-class>           <user-name>mproot</user-name>           <password>mproot123</password>        </local-tx-datasource>     </datasources> I have placed the DS XML file in default/deploy path of the JBoss server and mysql-connector-java-5.0.8-bin in default/lib, as indicated in the JBoss manual. *I'm using* - Eclipse, build 20120614-1722, - JBoss AS 6, - mysql-connector-java-5.0.8-bin driver. - As for the MySQL, mysql --version prints out "mysql  Ver 14.14 Distrib 5.5.25a, for Win32 (X86)". *My project build path* 1. jre6 2. JBoss 6.x Runtime 3. MySQL JDBC Driver 5.0.8, including mysql-connector-java-5.0.8-bin.jar [I have created it in Data Source Explorer) Any clues? Thanks in advance. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/757495#757495] Start a new discussion in Datasource Configuration at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]