Ubuntu Tomcat7 java.lang.ClassNotFoundException: org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory

Question

I'm trying to set up a JDBC DataSource in Tomcat 7 under Ubuntu 12.X, so I added the following to the context.xml file:

<Resource name="jdbc/myDS" auth="Container" type="javax.sql.DataSource"
    maxActive="5" maxIdle="2" maxWait="5000"
    driverClassName="org.postgresql.Driver" username="usr" password="***" url="jdbc:postgresql://localhost:5432/db" />

Obviously, using the right and tested database user id and password. When I restart Tomcat, I get the this error:

Feb 05, 2013 1:10:01 PM org.apache.catalina.core.NamingContextListener addResource
WARNING: Failed to register in JMX: javax.naming.NamingException: Could not create resource factory instance [Root exception is java.lang.ClassNotFoundException: org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory]

I googled, and found out the JDBC driver has to be copied to the $CATALINA_HOME/lib folder, so I copied the postgresql-9.2-1000.jdbc4.jar to /usr/share/tomcat7/lib, but it didn't help. I tried copying the file to other locations, with the same results.

Another attempt was to change the tomcat-dbcp.jar symlink in /usr/share/tomcat7/lib from ../../java/tomcat-dbcp-7.0.30.jar to ../../java/tomcat-dbcp.jar. The only change was I got only one warning instead of four, but the datasource doesn't work either.

Java version:

jdoe@sever:~$ java -version
java version "1.7.0_09"
OpenJDK Runtime Environment (IcedTea7 2.3.4) (7u9-2.3.4-0ubuntu1.12.10.1)
OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)

Any hint, very welcomed.

Cheers.

Answer 1

The library tomcat-dbcp-7.0.30.jar from repositories is corrupted.

Replace it with:

sudo wget -O /usr/share/java/tomcat-dbcp-7.0.30.jar http://search.maven.org/remotecontent?filepath=org/apache/tomcat/tomcat-dbcp/7.0.30/tomcat-dbcp-7.0.30.jar

Answer 2

The cause is a issue in the Ubuntu build/package process for Tomcat7. If I understand the issue correctly, Apache builds tomcat-dbcp.jar from binary files, while Ubuntu builds packages only from source. The Ubuntu project ends up needing to change the Java package name, which tends to break things for us poor users. The gory details may be found at the Ubuntu issues list.

The solution I found is to name the data source factory when I define the resource. In one case, I have a META-INF/context.xml file that contains:

<Resource name="jdbc/myDataSource"
    auth="Container"
    type="javax.sql.DataSource"
    driverClassName="com.mysql.jdbc.Driver"
    url="jdbc:mysql://localhost:3306/myDatabase"
    username="username" password="password"
    validationQuery="SELECT COUNT(*) FROM MY_TABLE"
    factory="org.apache.commons.dbcp.BasicDataSourceFactory" />

The critical element is the "factory" declaration, which overrides the built-in default.

On our production machines, the resource is defined in the GlobalNamingResources element of the server.xml file. Specifying the factory is only needed on the Ubuntu systems.

Answer 3

i had the same problem on CentOS. I got arounbd this by downloading a fresh copy of tomcat from site and uploaded tomcat-dbcp.jar to my online server lib, restart server :)

Answer 4

I had the same problem on Fedora 20 with Tomcat 7.0.55. I replaced the 7.0.30 with 7.0.55 in the file path and file name and this worked for me. Not sure why but this file was completely missing from the YUM install for tomcat 7. Cant use a database without it.