Examples of javax.ejb.IllegalLoopbackException

javax.ejb.IllegalLoopbackException
This exception indicates that an attempt was made to perform an illegal loop back invocation on a Singleton with container-managed concurrency. One possible cause is a loop back call to a WRITE method where the current thread does not already hold a WRITE lock. @author Reza Rahman

        Lock theLock = lockInfo.isReadLockedMethod() ? readLock : writeLock;


        if ( (rwLock.getReadHoldCount() > 0) &&
             (!rwLock.isWriteLockedByCurrentThread()) ) {
            if( lockInfo.isWriteLockedMethod() ) {
                throw new IllegalLoopbackException("Illegal Reentrant Access : Attempt to make " +
                        "a loopback call on a Write Lock method '" + invInfo.targetMethod1 +
                        "' while a Read lock is already held");
            }
        }

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        if( allowSerializedAccess ) {


            // Check for loopback call to avoid deadlock.
            if( sc.getStatefulWriteLock().getHoldCount() > 1 ) {


                throw new IllegalLoopbackException("Illegal Reentrant Access : Attempt to make " +
                        "a loopback call on method '" + inv.beanMethod + " for stateful session bean " +
                        ejbDescriptor.getName());
            }


        } else {

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        Lock theLock = lockInfo.isReadLockedMethod() ? readLock : writeLock;


        if ( (rwLock.getReadHoldCount() > 0) &&
             (!rwLock.isWriteLockedByCurrentThread()) ) {
            if( lockInfo.isWriteLockedMethod() ) {
                throw new IllegalLoopbackException("Illegal Reentrant Access : Attempt to make " +
                        "a loopback call on a Write Lock method '" + invInfo.targetMethod1 +
                        "' while a Read lock is already held");
            }
        }

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  public static void lockWrite(ReentrantReadWriteLock lock)
  {
    if (lock.getReadHoldCount() > 0
        && lock.getWriteHoldCount() == 0) {
      throw new IllegalLoopbackException("Cannot attempt a nested write lock without an existing write lock.");
    }
    
    lock.writeLock().lock();
  }

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  public static void lockWrite(ReentrantReadWriteLock lock,
                               long timeout)
  {
    if (lock.getReadHoldCount() > 0
        && lock.getWriteHoldCount() == 0) {
      throw new IllegalLoopbackException("Cannot attempt a nested write lock without an existing write lock.");
    }
    
    try {
      if (! lock.writeLock().tryLock(timeout, TimeUnit.MILLISECONDS))
        throw new ConcurrentAccessTimeoutException("Timed out acquiring write lock.");

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  public static void lockWrite(ReentrantReadWriteLock lock)
  {
    if (lock.getReadHoldCount() > 0
        && lock.getWriteHoldCount() == 0) {
      throw new IllegalLoopbackException(L.l("Cannot attempt a nested write lock without an existing write lock."));
    }
    
    lock.writeLock().lock();
  }

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  public static void lockWrite(ReentrantReadWriteLock lock,
                               long timeout)
  {
    if (lock.getReadHoldCount() > 0
        && lock.getWriteHoldCount() == 0) {
      throw new IllegalLoopbackException(L.l("Cannot attempt a nested write lock without an existing write lock."));
    }
    
    try {
      if (! lock.writeLock().tryLock(timeout, TimeUnit.MILLISECONDS))
        throw new ConcurrentAccessTimeoutException(L.l("Timed out acquiring write lock."));

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Related Classes of javax.ejb.IllegalLoopbackException

com.caucho.config.util.LockUtil

com.sun.ejb.containers.CMCSingletonContainer

com.sun.ejb.containers.StatefulSessionContainer

org.jboss.ejb3.concurrency.impl.EJBReadWriteLock

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