KB-2178 Tomcat startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Tue, 20 Apr 2021 06:39:46 GMT

Current Revision posted to Appian Knowledge Base by Parmida Borhani on 4/20/2021 6:39:46 AM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause

The classname for the MySQL driver has incorrectly been prefaced with org rather than com.

Action

Correct the driverClassName found in tomcatResources.xml file located in <APPIAN_HOME>/conf and restart Tomcat. The accurate convention is: driverClassName="com.mysql.jdbc.Driver"

Affected Versions

This article applies to Appian 18.3 and later.

Last Reviewed: April 2021

Tags: Tomcat, database, installation, mysql, application server, infrastructure

DRAFT KB-XXXX Tomcat startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Tue, 20 Apr 2021 00:32:41 GMT

Revision 10 posted to Appian Knowledge Base by Parmida Borhani on 4/20/2021 12:32:41 AM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause

The classname for the MySQL driver has incorrectly been prefaced with org rather than com.

Action

Correct the driverClassName found in tomcatResources.xml file located in <APPIAN_HOME>/conf and restart Tomcat. The accurate convention is: driverClassName="com.mysql.jdbc.Driver"

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, database, installation, mysql, application server, infrastructure

DRAFT KB-XXXX Tomcat startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Tue, 20 Apr 2021 00:32:01 GMT

Revision 9 posted to Appian Knowledge Base by Parmida Borhani on 4/20/2021 12:32:01 AM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause

The classname for the MySQL driver has incorrectly been prefaced with org rather than com.

Action

Correct the driverClassName found in tomcatResources.xml file located in <APPIAN_HOME>/conf and restart the application server. The accurate convention is: driverClassName="com.mysql.jdbc.Driver"

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, database, installation, mysql, infrastructure

DRAFT KB-XXXX Tomcat startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Mon, 19 Apr 2021 23:41:08 GMT

Revision 8 posted to Appian Knowledge Base by Parmida Borhani on 4/19/2021 11:41:08 PM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause

The classname for the MySQL driver should be prefaced with com, rather than org.

Action

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, database, installation, mysql, infrastructure

DRAFT KB-XXXX Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Mon, 19 Apr 2021 23:40:27 GMT

Revision 7 posted to Appian Knowledge Base by Parmida Borhani on 4/19/2021 11:40:27 PM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause

The classname for the MySQL driver should be prefaced with com, rather than org.

Action

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions

This article applies to Appian 18.3 and later.

Tags: Tomcat, database, installation, mysql, infrastructure

DRAFT KB-XXXX Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Mon, 19 Apr 2021 23:35:37 GMT

Revision 6 posted to Appian Knowledge Base by Parmida Borhani on 4/19/2021 11:35:37 PM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

18.3 onwards

DRAFT KB-XXXX Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Parmida Borhani — Mon, 19 Apr 2021 23:35:10 GMT

Revision 5 posted to Appian Knowledge Base by Parmida Borhani on 4/19/2021 11:35:10 PM

Symptoms

When starting Tomcat via start-appserver.sh or start-appserver.bat, the startup fails with the following message observed in the application server log:

SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

18.3 onwards

DRAFT KB-XXXX Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Thad Shattuck — Mon, 19 Apr 2021 03:54:50 GMT

Revision 4 posted to Appian Knowledge Base by Thad Shattuck on 4/19/2021 3:54:50 AM

Symptoms:

When starting tomcat via start-appserver.sh or start-appserver.bat, the startup fails with a the following message observed in the application server log:

2021-04-13 04:14:52 SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

18.3 onwards

Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Thad Shattuck — Mon, 19 Apr 2021 02:36:03 GMT

Revision 3 posted to Appian Knowledge Base by Thad Shattuck on 4/19/2021 2:36:03 AM

Symptoms:

When starting tomcat via start-appserver.sh or start-appserver.bat, the startup fails with a the following message observed in the application server log:

2021-04-13 04:14:52 SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

18.3 onwards

Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Thad Shattuck — Mon, 19 Apr 2021 02:30:23 GMT

Revision 2 posted to Appian Knowledge Base by Thad Shattuck on 4/19/2021 2:30:23 AM

Symptoms:

When starting tomcat via start-appserver.sh or start-appserver.bat, the startup fails with a the following message observed in the application server log:

2021-04-13 04:14:52 SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
 java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
 context: suite
 delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

20.4 onwards?

Application server startup fails with "java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver" exception

Thad Shattuck — Mon, 19 Apr 2021 02:15:33 GMT

Revision 1 posted to Appian Knowledge Base by Thad Shattuck on 4/19/2021 2:15:33 AM

Symptoms:

When starting tomcat via start-appserver.sh or start-appserver.bat, the startup fails with a the following message observed in the application server log:

2021-04-13 04:14:52 SEVERE [localhost-startStop-1] org.apache.tomcat.jdbc.pool.ConnectionPool.init Unable to create initial connections of pool.
        java.sql.SQLException: Unable to load class: org.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@31221be2;ClassLoader:AppianWebappClassLoader
  context: suite
  delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@31221be2

Cause:

The classname for the mysql drivers should be prefaced with 'com', rather than 'org'.

Action:

Change the driverClassName found in tomcatResources.xml file located in in <APPIAN_HOME>/conf and restart the application server.

driverClassName="com.mysql.jdbc.Driver"

Affected Versions:

20.4 onwards?