How to debug/solve MySQL JDBC connection timeout

Question

I am migrating a Java application with a MySQL DB. Now the connection times out at some point, although the same one with the same params worked fine a couple of transactions before. here is the code:

public class DBConnection {

public DBConnection() {
    super();
}

public static Connection getConnection(String database, String port,
        String schema, String username, String password)
        throws SQLException, ClassNotFoundException {
    Class.forName("com.mysql.jdbc.Driver");
            System.out.println("Connecting to DB:");

    Connection connection = DriverManager.getConnection("jdbc:mysql://"
            + database + ":" + port + "/" + schema, username, password);
            System.out.println("Connection success: " + connection.isValid(3));

    return connection;
}

}

And my logs:

2016-06-21 15:48:32,621 DEBUG [xxx] (default task-21) Statement: LOAD DATA LOCAL INFILE 'C:/CostCenter_Data/common/date_dim.csv' INTO TABLE il_costcenter.tbl_dim_date fields terminated by ',' enclosed by '"' lines terminated by ' 2016-06-21 15:48:32,621 DEBUG [xxx] (default task-21) ' IGNORE 1 LINES 2016-06-21 15:48:33,011 DEBUG [xxx] (default task-21) Connecting to DB: 2016-06-21 15:48:33,011 DEBUG [xxx] 2016-06-21 15:48:33,027 DEBUG [xxx] (default task-21) Connection success: true 2016-06-21 15:48:33,027 DEBUG [xxx] (default task-21) Executing statement... 2016-06-21 15:48:33,027 DEBUG [xxx] (default task-21) truncate table costcenter.tbl_dim_date 2016-06-21 15:48:33,246 DEBUG [xxx] (default task-21) Connecting to DB: 2016-06-21 15:48:33,246 DEBUG [xxx] (default task-21) Connection success: true 2016-06-21 15:48:33,246 DEBUG [xxx] (default task-21) Executing statement... 2016-06-21 15:48:33,246 DEBUG [xxx] (default task-21) insert into costcenter.tbl_dim_date (date_qualifier ,week_id ,month_id ,quarter_id ,year_id ,previous_date ,last_month_date ,last_quarter_date ,last_year_date ,date_begin_ts ,date_end_ts ,day_of_week_id ,weekday_flag ,last_day_in_month ,week_begin_date ,week_end_date ) select date_qualifier ,week_id ,month_id ,quarter_id ,year_id ,previous_date ,last_month_date ,last_quarter_date ,last_year_date ,date_begin_ts ,date_end_ts ,day_of_week_id ,case weekday_flag when 'true' then true else false end as weekday_flag ,case last_day_in_month when 'true' then true else false end as last_day_in_month ,week_begin_date ,week_end_date from il_costcenter.tbl_dim_date 2016-06-21 15:48:33,699 DEBUG [xxx] (default task-21) Connecting to DB: 2016-06-21 15:48:33,699 DEBUG 2016-06-21 15:53:31,404 WARN [com.arjuna.ats.arjuna] (Transaction Reaper) ARJUNA012117: TransactionReaper::check timeout for TX 0:ffff0a00016d:-382678fc:5769432f:39 in state RUN 2016-06-21 15:53:31,404 WARN [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012095: Abort of action id 0:f fff0a00016d:-382678fc:5769432f:39 invoked while multiple threads active within it. 2016-06-21 15:53:31,404 WARN [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012381: Action id 0:ffff0a00016d:-382678fc:5769432f:39 completed with multiple threads - thread default task-21 was in progress with java.io.FileInputStream.readBytes(Native Method) java.io.FileInputStream.read(Unknown Source) java.io.BufferedInputStream.read1(Unknown Source) java.io.BufferedInputStream.read(Unknown Source) sun.nio.cs.StreamDecoder.readBytes(Unknown Source) sun.nio.cs.StreamDecoder.implRead(Unknown Source) sun.nio.cs.StreamDecoder.read(Unknown Source) java.io.InputStreamReader.read(Unknown Source) java.io.BufferedReader.fill(Unknown Source) java.io.BufferedReader.readLine(Unknown Source) java.io.BufferedReader.readLine(Unknown Source) xxx sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) org.jboss.as.ee .component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) org.jboss.invocation.Intercep torContext.proceed(InterceptorContext.java:340) org.jboss.as.jpa.interceptor.SFSBInvocationInterceptor.processInvocation(SFSBInvocationInterceptor.java:57) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.stateful.StatefulSessionSynchronizationInterceptor.processInvocation(StatefulSessionSynchronizationInterceptor.java:125) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64) org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) org.jboss. invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.stateful.StatefulComponentInstanceInterceptor.processInvocation(StatefulComponentInstanceInterceptor.java:65) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInCallerTx(CMTTxInterceptor.java:254) org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:329) org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) org.jboss.invocation.Inte rceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66) org.jboss.invocation.InterceptorContext.proceed( InterceptorContext.java:340) org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356) org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636) org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext.run(InterceptorC ontext.java:356) org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:195) org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73) xxxPersistenceService$$$view3.invokeTEL(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) org.j boss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:436) org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:127) org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100) xxx.PersistenceService$Proxy$_$$ Weld$EnterpriseProxy$.invokeTEL(Unknown Source) xxx.PersistenceService$Proxy$ $$ WeldClientProxy.invokeTEL(Unknown Source) xxx.FileManagementService.archiveFile(FileManagementService.java:83) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52) org.jboss.invocation.InterceptorContext.proceed(Intercep torContext.java:340) org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82) org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93) org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437) org.jboss.weld.ejb.Abstrac tEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64) org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.pool.PooledInstanceInter ceptor.processInvocation(PooledInstanceInterceptor.java:51) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275) org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:327) org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100) org.jboss.invocation.InterceptorCo ntext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org .jboss.invocation.InterceptorContext.run(InterceptorContext.java:356) org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636) org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356) org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:195) org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185) org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340) org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInte rceptor.java:61) org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73) xxx.FileManagementService$$$view6.archiveFile(Unknown Source) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:436) org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:127) org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:67) org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100) xxx.FileManagementService$Proxy$ $$_Weld$EnterpriseProxy$.archiveFile(Unknown So urce) xxx.FileManagementController.archiveFile(FileManagementController.java:154) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) javax.el.ELUtil.invokeMethod(ELUtil.java:308) javax.el.BeanELResolver.invoke(BeanELResolver.java:415) javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256) com.sun.el.parser.AstValue.invoke(AstValue.java:285) com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) com.sun.faces.facelets.el.TagMethodExpression.invoke(TagM ethodExpression.java:105) javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87) com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) org.primefaces.application.DialogActionListener.processAction(DialogActionListener.java:45) javax.faces.component.UICommand.broadcast(UICommand.java:315) javax.faces.component.UIData.broadcast(UIData.java:1108) javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) javax.faces.webapp.FacesServlet.service(FacesServlet.java:658) io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFi lter(FilterHandler.java:129) org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:78) io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84) io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest (ServletAuthenticationCallHandler.java:57) io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51) io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56) io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) io.undertow.security.handlers.Notif icationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284) io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263) io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174) io.undertow.server.Connectors.e xecuteRootHandler(Connectors.java:202) io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source)

2016-06-21 15:53:31,436 WARN [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012108: CheckedAction::check - atomic action 0:ffff0a00016d:-382678fc:5769432f:39 aborting with 1 threads active! 2016-06-21 15:53:31,436 WARN [org.jboss.as.txn] (Transaction Reaper Worker 0) WFLYTX0027: The pre-jca synchronization org.jboss.as.ejb3.component.stateful.StatefulSessionSynchronizationInterceptor$StatefulSessionSynchronization@e921ad associated with tx TransactionImple < ac, BasicAction: 0:ffff0a00016d:-382678fc:5769432f:39 status: ActionStatus.ABORTED > failed during after completion: java.lang.IllegalMonitorStateException at org.jboss.as.ejb3.tx.OwnableReentrantLock.unlock(OwnableReentrantLock.java:120) at org.jboss.as.ejb3.component.stateful.StatefulSessionSynchronizationInterceptor.releaseLock(StatefulSessionSynchronizationInterceptor.java:181) at org.jboss.as.ejb3.component.stateful.StatefulSessionSynchronizationInterceptor.releaseInstance(StatefulSessionSynchronizationInterceptor.java:173) at org.jboss.as.ejb3.component.stateful.StatefulSessionSynchronizationInterceptor$StatefulSessionSynchronization.afterCompletion(StatefulSessionSynchronizationInterceptor.java:250) at org.jbos s.as.txn.service.internal.tsr.JCAOrderedLastSynchronizationList.afterCompletion(JCAOrderedLastSynchronizationList.java:147) at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion(SynchronizationImple.java:96) at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:545) at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:476) at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:130) at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:215) at com.arjuna.ats.arjuna.coordinator.TransactionReaper.doCancellations(TransactionReaper.java:381) at com.arjuna.ats.internal.arjuna.coordinator.ReaperWorkerThread.run(ReaperWorkerThread.java:78)

2016-06-21 15:53:31,436 WARN [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012121: TransactionReaper::doCancellations worker Thread[Transaction Reaper Worker 0,5,main] successfully canceled TX 0:ffff0a00016d:-382678fc:5769432f:39

The JDBC version matches DB-MySQL version, I don't know where to look or what error sources to consider anymore. Oh and the timeout is set to 5 mins, so that's not it.

Big Thanks for any help!

PS Application and Db are both running on the same secured windows server, I access via localhost:3306, external access is blocked

Answer 1

check in mysql when this issue happen how many connections are established - you may use:

mysql> SHOW FULL PROCESSLIST;

it will provide you information about number of opened connections to your MySQL DB.

Maybe try to use setAutocommit(true) or if there is a lot of data (performance issue) use batch mode and insert data in series and commit after each.

Answer 2

I solved the issue. I think it was this piece of code within java.sql.DriverManager, but I can't verify that. My guess is that the synchronized was blocking something, since a connection leak was not the problem (The returned Connection in the original code is used in a try block, which since java 7 or 8 closes everything that implements Autocloseable interface automatically)

private static Connection getConnection(
        String url, java.util.Properties info, Class<?> caller) throws SQLException {
        /*
         * When callerCl is null, we should check the application's
         * (which is invoking this class indirectly)
         * classloader, so that the JDBC driver class outside rt.jar
         * can be loaded from here.
         */
        ClassLoader callerCL = caller != null ? caller.getClassLoader() : null;
        synchronized(DriverManager.class) {
            // synchronize loading of the correct classloader.
            if (callerCL == null) {
                callerCL = Thread.currentThread().getContextClassLoader();
            }
        }

What I did was using a connection pool:

http://www.javatips.net/blog/dbcp-connection-pooling-example