java - ActiveMQ, why RedeliveryCounter dont increase when shutdown consumer before Ack -


my consumer running in application server. activemq config: 

optimizeacknowledge=true   optimizeacknowledgetimeout=5000   destination=queue.test.msg?consumer.prefetchsize=10

after sent 10 messages, "web console(http://localhost:8161/admin)" see 3 messages dont ack(used optimizeacknowledge), @ time when restarted consumer server, received 3 message again , redeliverycounter=0. dont determine redelivery messages or sent producer.

this question find in transaction. run test class: org\apache\activemq\redeliverypolicytest.java, methoed:testrepeatedredeliveryreceivenocommit. debug in "connection.close();" , stop it. message's redeliverycounter "0".

question: when determine message redelivery or not, must use store save message's id after consumer processed , check if exist when consumer received message?

the code below:

public void testrepeatedredeliveryreceivenocommit() throws exception {     connection.start();     session dlqsession = connection.createsession(true, session.session_transacted);     activemqqueue destination = new activemqqueue("test");     messageproducer producer = dlqsession.createproducer(destination);      // send messages     producer.send(dlqsession.createtextmessage("1st"));      dlqsession.commit();     messageconsumer dlqconsumer = dlqsession.createconsumer(new activemqqueue("activemq.dlq"));      final int maxredeliveries = 4;     (int i=0;i<=maxredeliveries +1;i++) {          connection = (activemqconnection)factory.createconnection(username, password);         connections.add(connection);         // receive message jms api         redeliverypolicy policy = connection.getredeliverypolicy();         policy.setinitialredeliverydelay(0);         policy.setuseexponentialbackoff(false);         policy.setmaximumredeliveries(maxredeliveries);          connection.start();         session session = connection.createsession(true, session.auto_acknowledge);         messageconsumer consumer = session.createconsumer(destination);          activemqtextmessage m = ((activemqtextmessage)consumer.receive(4000));         if (i<=maxredeliveries) {             m.setredeliverycounter(1);             system.out.println("text:"+ m.gettext());             system.out.println("redeliverycounter:" + m.getredeliverycounter());         } else {             system.out.println("null on exceeding redelivery count:" + m);         }         connection.close();         connections.remove(connection);     }      // should able message off dlq now.     textmessage m = (textmessage)dlqconsumer.receive(1000);     system.out.println("got message dlq:" + m);     system.out.println("text:"+ m.gettext());     string cause = m.getstringproperty(activemqmessage.dlq_delivery_failure_cause_property);     system.out.println("cause exception has policy ref:" +  cause.contains("redeliverypolicy"));     dlqsession.commit(); }


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