Queue with callback function - strange behaviour when using max_retries

Question

Hi,
I hope someone can tell me what is wrong or can explain the following strange behaviour to me.
I am using one queue with a registered callback function. To test the behavoiur in case of an error I tested different settings, with or without explicit exception queue and with or without parameter max_retries.
Database Version is 11.2.0.2.   Enterprise Edition
I enqueue 10 messages in a loop.
I define no exception queue and do not set max_retries
==> all messages stay in the queuetable with q_name = AQ$_... (implicit exception queue) and retry_count = 5
I define no exception queue and set max_retries = 4
==> 1 message stays in the queuetable with q_name = AQ$_... (implicit exception queue) and retry_count = 4
       9 messages stay in the queuetable with q_name = nomal queue name and retry_count = 0
I define an exception queue and set max_retries = 4
==> 1 message is transfered to the Exception Queuetable with retry_count = 4
       9 messages stay in the normal Queuetable and retry_count = 0
I define an exception queue and do not set max_retries
==> all 10 messages are transferred to the Exception Queuetable with retry_count = 5
I have no explanation for the behaviour in case 2 and case 3.
To create the queue and the callback I use this code (reduced to minimum):
begin
   DBMS_AQADM.CREATE_QUEUE_TABLE(Queue_table        => 'TESTUSER.TEST_TABELLE'
                               , Queue_payload_type => 'SYS.AQ$_JMS_TEXT_MESSAGE'
                               , sort_list          => 'enq_time'
                               , multiple_consumers => FALSE
   DBMS_AQADM.CREATE_QUEUE( queue_name  => 'TESTUSER.TEST_QUEUE'
                          , queue_table => 'TESTUSER.TEST_TABELLE'
--                          , max_retries => 4                     uncomment this line to set max_retries
-- uncomment the following Block to use an explicit Exception Queue
/*   DBMS_AQADM.CREATE_QUEUE_TABLE(Queue_table        => 'TESTUSER.TEST_TABELLE_EXC'
                               , Queue_payload_type => 'SYS.AQ$_JMS_TEXT_MESSAGE'
                               , sort_list          => 'enq_time'
                               , multiple_consumers => FALSE
   DBMS_AQADM.CREATE_QUEUE( queue_name  => 'TESTUSER.TEST_QUEUE_EXC'
                          , queue_table => 'TESTUSER.TEST_TABELLE_EXC'
                          , queue_type  => dbms_aqadm.EXCEPTION_QUEUE);
   DBMS_AQADM.START_QUEUE('TESTUSER.TEST_QUEUE');
end;
create or replace procedure test_procedure
  (context  RAW
  ,reginfo  sys.AQ$_reg_info
  ,descr    sys.AQ$_descriptor
  ,payload  VARCHAR2
  ,payloadl NUMBER
  ) authid definer
  IS
  -- für Queue
  dequeue_options   DBMS_AQ.dequeue_options_t;
  message_prop      DBMS_AQ.message_properties_t;
  message_hdl       raw(16);
  message           sys.aq$_jms_text_message;
  l_daten           VARCHAR2(32767);
  ex_hugo          EXCEPTION;
  BEGIN
    dequeue_options.msgid         := descr.msg_id;
    dequeue_options.consumer_name := descr.consumer_name;
    dbms_aq.dequeue(descr.queue_name, dequeue_options, message_prop, message, message_hdl);
    -- to provoke an error
    RAISE ex_hugo;
    -- regurlar coding
    commit;
exception
  when others then
       rollback;
       RAISE;
end;
DECLARE
   reginfo1    sys.aq$_reg_info;
   reginfolist sys.aq$_reg_info_list;
BEGIN
   reginfo1 := sys.aq$_reg_info('TESTUSER.TEST_QUEUE', DBMS_AQ.NAMESPACE_AQ, 'plsql://TESTUSER.TEST_PROCEDURE?PR=0',HEXTORAW('FF'));
   reginfolist := sys.aq$_reg_info_list(reginfo1);
   sys.dbms_aq.register(reginfolist, 1);
   commit;
END;
to enqueue my messages i use:
DECLARE
  message            sys.aq$_jms_text_message;
  enqueue_options    dbms_aq.enqueue_options_t;
  message_properties dbms_aq.message_properties_t;
  msgid              raw(16);
  v_daten            clob;
BEGIN
   message := sys.aq$_jms_text_message.construct;
   for i in 1..10
   loop
      v_daten := '{ dummy_text }';
      message.set_text(v_daten);
-- uncomment the following line to use an explicit Exception Queue     
--      message_properties.exception_queue := 'TESTUSER.TEST_QUEUE_EXC'; 
      dbms_aq.enqueue(queue_name         => 'TESTUSER.TEST_QUEUE',
                      enqueue_options    => enqueue_options,
                      message_properties => message_properties,
                      payload            => message,
                      msgid              => msgid);
      message.clear_properties();
   end loop;
   commit;
END;

Answer 1

Hi Chris,
I tried to reproduce your complaint, but was unable to. I didnt use auditting however, just a series of "select user from dual" with proxy authentication. You might want to see if you can put together a small complete testcase for this and open a sr with support.
Cheers
Greg