Struts Problem Report

Struts has detected an unhandled exception:

Messages:
  1. Can't call rollback when autocommit=true
  2. ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true ### The error may exist in mappers/UserMapper.xml ### The error may involve net.lliira.vpn.model.dao.mapper.UserMapper.selectServers ### The error occurred while executing a query ### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true
File: org/apache/ibatis/exceptions/ExceptionFactory.java
Line number: 23

Stacktraces

org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true ### The error may exist in mappers/UserMapper.xml ### The error may involve net.lliira.vpn.model.dao.mapper.UserMapper.selectServers ### The error occurred while executing a query ### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true 
    org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
    org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:104)
    org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:95)
    org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:124)
    org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:90)
    org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40)
    com.sun.proxy.$Proxy5.selectServers(Unknown Source)
    net.lliira.vpn.model.user.DefaultUserFactory.getServers(DefaultUserFactory.java:622)
    net.lliira.vpn.site.interceptor.VpnModelInterceptor.intercept(VpnModelInterceptor.java:77)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
    org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
    org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:827)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true 
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
    com.mysql.jdbc.Util.getInstance(Util.java:360)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:924)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:870)
    com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:4586)
    org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:389)
    org.apache.ibatis.datasource.pooled.PooledDataSource.getConnection(PooledDataSource.java:80)
    org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:131)
    org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:58)
    org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
    org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:69)
    org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:56)
    org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
    org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:141)
    org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:105)
    org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:81)
    org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:101)
    org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:95)
    org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:124)
    org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:90)
    org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40)
    com.sun.proxy.$Proxy5.selectServers(Unknown Source)
    net.lliira.vpn.model.user.DefaultUserFactory.getServers(DefaultUserFactory.java:622)
    net.lliira.vpn.site.interceptor.VpnModelInterceptor.intercept(VpnModelInterceptor.java:77)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
    org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
    org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:827)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)

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  struts.devMode=false
in your WEB-INF/classes/struts.properties file.