maybe my setup is quite special, but I do have issues when I define a JDBC Datasource for Java EE container in my web.xml file.

I configured my Datasource in my web.xml as follow:

```

<data-source>
   <name>java:app/myapp/DS</name>
   <class-name>com.mysql.jdbc.Driver</class-name>
   <url>jdbc:mysql://localhost:3306/database?useSSL=false&amp;allowPublicKeyRetrieval=true</url>
   <user>foo</user>
   <password>pass</password>
   <transactional>true</transactional>
   <isolation-level>TRANSACTION_READ_COMMITTED</isolation-level>
   <initial-pool-size>2</initial-pool-size>
   <max-pool-size>10</max-pool-size>
   <min-pool-size>5</min-pool-size>
   <max-statements>0</max-statements>
   </data-source>

```

After I use datasource's name as my jta-data-source in my persistence file as follow:

```

<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
   <persistence-unit name="java-rs-with-hibernate" transaction-type="JTA">
   <jta-data-source>java:app/myapp/DS</jta-data-source>
   <class>com.patrickhub.ch.java_rs_with_hibernate.domain.Product</class>
   <properties>

   <property name="javax.persistence.schema-generation.database.action" value="none"/>
   <property name="javax.persistence.schema-generation.scripts.action" value="none"/>
   </properties>
   </persistence-unit>
</persistence>

```

And in my code I used the EntityManager to make request to the database.

But when I deploy it to wildfly 18.0.1, I get the following errors:

```

at org.jboss.as.connector@18.0.1.Final//org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:174)
  at org.jboss.msc@1.4.11.Final//org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1739)
  at org.jboss.msc@1.4.11.Final//org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1701)
  at org.jboss.msc@1.4.11.Final//org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1559)
  at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
  at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
  at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
  at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1363)
  at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.jboss.jca.deployers.common.DeployException: WFLYJCA0030: unable to deploy
  at org.jboss.as.connector@18.0.1.Final//org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer.deploy(AbstractDataSourceService.java:376)
  at org.jboss.as.connector@18.0.1.Final//org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:160)
   ... 8 more
Caused by: org.jboss.as.controller.OperationFailedException: WFLYJCA0117: com.mysql.jdbc.Driver is not a valid javax.sql.DataSource implementation [ "WFLYJCA0117: com.mysql.jdbc.Driver is not a valid javax.sql.DataSource implementation" ]
   ... 10 more

```

I think that if I replace com.mysql.jdbc.Driver with com.mysql.jc.jdbc.Driver, it will deploy successfully but I still have the same problem and the same message error.

I don't know if I miss something on how to define a mysql JDBC datasource in web.xml file. but I think it is correct.

Please can someone help me.