8 Replies Latest reply on Nov 20, 2002 1:23 PM by MN

    Another "removing bean lock and it has tx set" IllegalStateE

    MN Newbie

      Hi,

      I get an IllegalStateException when calling a 1.1 CMP Entity bean instance running on JBoss 3.0.4 (also 3.0.3) with message "removing bean lock and it has tx set" from QueuedPessimisticEJBLock. I already found out that this often happens when people do not correctly implement equals() and hashCode() in the PK class (I also have a composite PK class). My equals() and hashCode() implementations look okay to me, so I think that's not the problem (maybe I am wrong).

      My client's code is this:

      try {
      UserNetworkConnectionPK pk = new UserNetworkConnectionPK(objID);
      System.out.println("PK is " + pk.toString() + ", hashCode is " + pk.hashCode());
      conn = connHome.findByPrimaryKey(pk);
      System.out.println("Found connection");
      conn.prepareRemove(userID);
      System.out.println("Prepared remove");
      conn.remove();
      System.out.println("Removed connection");
      }
      catch (Exception e) {
      log.error("Caught Exception while trying to remove UserNetworkConnection "
      + objID + "!", e);
      }

      The client crashes when it tries to call conn.prepareRemove(), which checks if the user is allowed to call this method:

      PK is 2-35576, hashCode is -161032
      Found connection
      [ERROR,2002-11-13 12:17:55,178,DeleteRFCProcessor] Caught Exception while trying
      to remove UserNetworkConnection 2-35576!
      java.rmi.ServerException: RemoteException occurred in server thread; nested exce
      ption is:
      javax.transaction.TransactionRolledbackException: removing bean lock and
      it has tx set!UserNetworkConnection 2-35576; nested exception is:
      java.lang.IllegalStateException: removing bean lock and it has tx set!Us
      erNetworkConnection 2-35576
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:292)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
      60)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
      .java:701)
      at java.lang.Thread.run(Thread.java:536)
      at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Stream
      RemoteCall.java:247)
      at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:
      223)
      at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
      at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Sour
      ce)
      at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvo
      kerProxy.java:138)
      at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.jav
      a:108)
      at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.
      java:77)
      at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:8
      0)
      at org.jboss.proxy.ejb.EntityInterceptor.invoke(EntityInterceptor.java:1
      16)
      at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
      at $Proxy28.prepareRemove(Unknown Source)
      at com.polypol.MessageHandling.DeleteRFCProcessor.process(DeleteRFCProce
      ssor.java:92)
      at com.polypol.MessageHandling.DeleteRFCProcessor.start(DeleteRFCProcess
      or.java:56)
      at com.polypol.Dispatcher.PPRequestHandler.handleRequest(PPRequestHandle
      r.java:822)
      at com.polypol.Dispatcher.PPRequestHandler.run(PPRequestHandler.java:81)

      at java.lang.Thread.run(Thread.java:536)
      Caused by: javax.transaction.TransactionRolledbackException: removing bean lock
      and it has tx set!UserNetworkConnection 2-35576; nested exception is:
      java.lang.IllegalStateException: removing bean lock and it has tx set!Us
      erNetworkConnection 2-35576
      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
      rceptor.java:230)
      at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxIntercep
      torCMT.java:232)
      at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:6
      0)
      at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.
      java:130)
      at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
      at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:479)
      at org.jboss.ejb.Container.invoke(Container.java:712)
      at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1046)
      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
      382)
      at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
      sorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
      60)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
      .java:701)
      ... 1 more
      Caused by: java.lang.IllegalStateException: removing bean lock and it has tx set
      !UserNetworkConnection 2-35576
      at org.jboss.ejb.plugins.lock.QueuedPessimisticEJBLock.removeRef(QueuedP
      essimisticEJBLock.java:427)
      at org.jboss.ejb.BeanLockManager.removeLockRef(BeanLockManager.java:107)

      at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockIntercep
      tor.java:124)
      at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreation
      Interceptor.java:69)
      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInte
      rceptor.java:107)
      ... 19 more

      I also tried to lookup and use a UserTransaction, but this doesn't change anything, except that the DB (MySQL) will not be left in an unconsistent state anymore.

      The PK class is implemented as follows:

      public class UserNetworkConnectionPK implements Serializable {

      private static final Category log = Category.getInstance("UserNetworkConnectionPK");

      public long InitiatorID;
      public long AcceptorID;

      public UserNetworkConnectionPK(String ID) {
      int p = -2;
      String initiator = null;
      String acceptor = null;
      try {
      p = ID.indexOf("-");
      initiator = ID.substring(0, p);
      acceptor = ID.substring(p+1);
      this.InitiatorID = Long.parseLong(initiator);
      this.AcceptorID = Long.parseLong(acceptor);
      }
      catch (NumberFormatException e) {
      log.error("Exception in UserNetworkConnectionPK(" + ID + ")!", e);
      log.error("p is " + p);
      log.error("initiator is " + initiator);
      log.error("acceptor is " + acceptor);
      throw e;
      }
      }

      public UserNetworkConnectionPK() {}

      public int hashCode() {
      return (((short) InitiatorID) << 16) ^ ((short) AcceptorID);
      }

      public boolean equals(Object obj) {
      if (obj == null) return false;
      if (obj instanceof UserNetworkConnectionPK) {
      UserNetworkConnectionPK comp = (UserNetworkConnectionPK) obj;
      if (this.InitiatorID == comp.InitiatorID && this.AcceptorID == comp.InitiatorID) {
      return true;
      }
      else {
      return false;
      }
      }
      else {
      return false;
      }
      }


      /**
      * Return a string representation of the object
      */
      public String toString() {
      StringBuffer buffer = new StringBuffer();
      buffer.append(this.InitiatorID);
      buffer.append("-");
      buffer.append(this.AcceptorID);
      return buffer.toString();
      }

      }

      TX attribute of UserNetworkConnection.prepareRemove() is configured as Supports:

      <container-transaction>

      <ejb-name>UserNetworkConnection</ejb-name>
      <method-intf>Remote</method-intf>
      <method-name>prepareRemove</method-name>
      <method-params>
      <method-param>long</method-param>
      </method-params>

      <trans-attribute>Supports</trans-attribute>
      </container-transaction>

      Everything seems to be okay. Changing the transaction attributes did not help.

      Does anybody know what causes the IllegalStateException?

      Thanks in advance,
      Michael