Jboss 7.2 根记录器级别 DEBUG 在执行 jpa 查询时引发 ConcurrentModificationException

Question

Environment:

• JBoss 7.2
• Java 11
• Hibernate 5.3.15.Final

I am getting an error ConcurrentModificationException on executing jpa query from a method in stateless ejb. It was working until now and no idea what it could be. The query is only getting records in a condition.

Error log

13:06:24,419 ERROR [es.caib.accfor.presentation.back.security.UserPrincipalManager] (default task-1) Error UserPrincipalManager.doFilter: es.caib.accfor.business.AppException: Exception UsuarioService.trace
    at deployment.accfor2.ear.accfor-ejb.jar//es.caib.accfor.business.security.boundary.UsuariService.trace(UsuariService.java:254)
    ...
    Suppressed: javax.ejb.EJBTransactionRolledbackException: javax.transaction.RollbackException: ARJUNA016053: Could not commit transaction.
        at org.jboss.as.ejb3@7.2.0.GA-redhat-00005//org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:114)
        at org.jboss.as.ejb3@7.2.0.GA-redhat-00005//org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:122)
        at org.jboss.as.ejb3@7.2.0.GA-redhat-00005//org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:256)
        ... 106 more
    Caused by: javax.transaction.RollbackException: ARJUNA016053: Could not commit transaction.
        at org.jboss.jts//com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1300)
        at org.jboss.jts//com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:126)
        at org.jboss.jts.integration//com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:89)
        at org.wildfly.transaction.client@1.1.2.Final-redhat-1//org.wildfly.transaction.client.LocalTransaction.commitAndDissociate(LocalTransaction.java:77)
        at org.wildfly.transaction.client@1.1.2.Final-redhat-1//org.wildfly.transaction.client.ContextTransactionManager.commit(ContextTransactionManager.java:71)
        at org.jboss.as.ejb3@7.2.0.GA-redhat-00005//org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:88)
        ... 108 more
        Suppressed: javax.transaction.RollbackException: WFTXN0061: Transaction is marked rollback-only
            ...
        Suppressed: javax.transaction.RollbackException: WFTXN0061: Transaction is marked rollback-only
            ...
    Caused by: java.util.ConcurrentModificationException
        at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1493)
        at java.base/java.util.HashMap$EntryIterator.next(HashMap.java:1526)
        at java.base/java.util.HashMap$EntryIterator.next(HashMap.java:1524)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.internal.util.EntityPrinter.toString(EntityPrinter.java:104)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.event.internal.AbstractFlushingEventListener.logFlushResults(AbstractFlushingEventListener.java:129)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:105)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:38)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1454)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:511)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3283)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2479)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.beforeCompletion(JtaTransactionCoordinatorImpl.java:352)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.resource.transaction.backend.jta.internal.synchronization.SynchronizationCallbackCoordinatorNonTrackingImpl.beforeCompletion(SynchronizationCallbackCoordinatorNonTrackingImpl.java:47)
        at org.hibernate@5.3.7.Final-redhat-00001//org.hibernate.resource.transaction.backend.jta.internal.synchronization.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:37)
        at org.jboss.as.transactions@7.2.0.GA-redhat-00005//org.jboss.as.txn.service.internal.tsr.JCAOrderedLastSynchronizationList.beforeCompletion(JCAOrderedLastSynchronizationList.java:113)
        at org.wildfly.transaction.client@1.1.2.Final-redhat-1//org.wildfly.transaction.client.AbstractTransaction.performConsumer(AbstractTransaction.java:236)
        at org.wildfly.transaction.client@1.1.2.Final-redhat-1//org.wildfly.transaction.client.AbstractTransaction.performConsumer(AbstractTransaction.java:247)
        at org.wildfly.transaction.client@1.1.2.Final-redhat-1//org.wildfly.transaction.client.AbstractTransaction$AssociatingSynchronization.beforeCompletion(AbstractTransaction.java:292)
        at org.jboss.jts//com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:76)
        at org.jboss.jts//com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:360)
        at org.jboss.jts//com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:91)
        at org.jboss.jts//com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:162)
        at org.jboss.jts//com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1288)
        ... 113 more

UserPrincipalManager(filter)

@WebFilter(filterName = "UserPrincipalFilter", urlPatterns = "/*")
public class UserPrincipalManager implements Filter {

    @Inject
    private UsuariServiceable usuariSvc;


    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws java.io.IOException, ServletException {
        ...
        Usuari usuari = usuariSvc.trace(loadUserData(sReq.getUserPrincipal()));
        ...
        chain.doFilter(req, resp);
    }

UserService

@RolesAllowed("**")
@Stateless
public class UserService {
    ...

    public Usuari trace(UserPrincipal uPrincipal) throws AppException {
       //I tried a simple db query and also get this error ConcurrentModificationException without anything else
       ...
       List<VTaula> rolNames = vTaulaSvc.findByNames(rolsToAdd); //Error by calling findByNames(HashSet<String>)
       ...
    }
}

VTaulaService

@PermitAll
@Stateless
public class VTaulaService extends BusinessService<VTaula> implements VTaulaServiceable {
    @PersistenceContext(unitName = "appPU")
    protected EntityManager eManager;
    ...
    public List<VTaula> findByNames(Set<String> names) throws AppException {
        List<VTaula> vTaulas;

        try {
            Query q = eManager.createNamedQuery("SELECT g FROM VTaula g WHERE g.nomCA IN (:names)");
            q.setParameter("names", names);
            vTaulas = q.getResultList();  //Error ConcurrentModificationException

        } catch (Exception e) {
            log.error("findByNomCA", e);
            throw new AppException("Error VTaula " + e, e);
        }

        return vTaulas;
    }

    ...
}

standalone.xml

...
<root-logger>
   <level name="DEBUG"/>
   <handlers>
       <handler name="CONSOLE"/>
       <handler name="FILE"/>
   </handlers>
</root-logger>
...

Answer 1

The problem seems to be with root-logger and level DEBUG, I just take back that level to INFO and this problems fade away.

The real problem seems to be something related with hibernate log, but no idea what is exactly.

This is a workaraound but I could also use DEBUG level.

standalone.xml

...
<root-logger>
   <level name="INFO"/>
   <handlers>
       <handler name="CONSOLE"/>
       <handler name="FILE"/>
   </handlers>
</root-logger>
...

I added debug level logger avoiding ConcurrentModificationException by doing this way:

Add package logger with CLI

/subsystem=logging/logger=com.package:add(level=DEBUG)
/subsystem=logging/console-handler=CONSOLE:write-attribute(name=level,value=DEBUG)

The result standalone.xml logger looks like this

standalone.xml

    <subsystem xmlns="urn:jboss:domain:logging:6.0">
        <console-handler name="CONSOLE">
            <level name="DEBUG"/>
            <formatter>
                <named-formatter name="COLOR-PATTERN"/>
            </formatter>
        </console-handler>
        <periodic-rotating-file-handler name="FILE" autoflush="true">
            <formatter>
                <named-formatter name="PATTERN"/>
            </formatter>
            <file relative-to="jboss.server.log.dir" path="server.log"/>
            <suffix value=".yyyy-MM-dd"/>
            <append value="true"/>
        </periodic-rotating-file-handler>
        <logger category="com.arjuna">
            <level name="WARN"/>
        </logger>
        <logger category="org.jboss.as.config">
            <level name="DEBUG"/>
        </logger>
        <logger category="sun.rmi">
            <level name="WARN"/>
        </logger>
        <logger category="com.package">
            <level name="DEBUG"/>
        </logger>
        <root-logger>
            <level name="INFO"/>
            <handlers>
                <handler name="CONSOLE"/>
                <handler name="FILE"/>
            </handlers>
        </root-logger>
        <formatter name="PATTERN">
            <pattern-formatter pattern="%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n"/>
        </formatter>
        <formatter name="COLOR-PATTERN">
            <pattern-formatter pattern="%K{level}%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n"/>
        </formatter>
    </subsystem>