Hibernate Transaction not successfully started when I change db name - mysql

Question

I'm deploying a web-app to a tomcat container, connected to a mysql container. When I deploy my war, after I created the MySQL database (inserted via hibernate.cfg.xml), all works well.
But, if I want to connect my web-app to a new database, created after I deploy my war to webapps/ folder, I have the following lines:
27-Feb-2017 09:47:36.199 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()
27-Feb-2017 09:47:36.200 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()
27-Feb-2017 09:52:03.503 SEVERE [http-apr-8080-exec-7] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [controller.AccountController] in context with path [/ShoppingAT] threw exception
org.hibernate.TransactionException: Transaction not successfully started
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:200)
at model.AbstractModel.create(AbstractModel.java:137)
at controller.AccountController.doPost(AccountController.java:113)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2445)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
How can I solve this problem?
This is my hibernate.cfg.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC^M
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"^M
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">^M
<hibernate-configuration>^M
<session-factory>^M
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>^M
<property name="hibernate.connection.password">pass</property>^M
<property name="hibernate.connection.url">jdbc:mysql://172.19.0.3:3306/shine</property>^M
<property name="hibernate.connection.username">root</property>^M
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<mapping class="entities.Responsabile"/>
<mapping class="entities.Utente"/>
<!-- <mapping class="entities.Prodotti"/> -->
</session-factory>
</hibernate-configuration>
My goal is to create a new (copied) web-app from my initial .war. So, I've renamed my war, deployed it to webapps/, and edited hibernate.cfg.xml. If I rename my war and point it to the initial db, it's all ok. This problem appears when I point to another db. In fact, in the logs, there is the "context path" of the initial web app (/ShoppingAT).