Msgs not getting picked up after a while...

Question

Hi,
I am new in terms of mq design and performance issues and i am having this problem where the msgs stop being processed after a while..( they just stay there is the inbound q).. This is someone else's code and i cannot figure out what the problem is. When the server starts the msgs get processed fine but after a few days/weeks the application totally stops processing the msgs and the msgs just keep piling on the q. I don't see any error msgs or anything which could help. The way it's been implemented is that on the server start up a servlet starts a scheduled job.
timerReceiver = new Timer();
timerReceiver.schedule(new XMLMsgReceiver(), secXmlMsgsReceiveInitialDelay * 1000, secXmlMsgsReceiveInterval * 1000);and the run() method of this class "XMLMsgReceiver" has the following
if(!XMLMsgReceiver.isRunning) {
debug("starting the MQ listener ");
this.startListener();
else
debug("MQ listener is already UP");The startListener() method has the following code
XMLMsgReceiver.isRunning = true;
QueueConnection connection = null;
QueueSession session = null;
try {
Context context = new InitialContext();
QueueConnectionFactory factory =
(QueueConnectionFactory) context.lookup(
MsgConstants.QUEUE_CONNECTION_FACTORY_NAME);
Queue queue = (Queue) context.lookup(MsgConstants.INBOUND_QUEUE_NAME);
connection = factory.createQueueConnection();
session = connection.createQueueSession(true, Session.AUTO_ACKNOWLEDGE);
QueueReceiver receiver = session.createReceiver(queue);
connection.start();
Message m = null;
int counter = 0;
while (true) {
counter++;
try{
m = receiver.receive(1);
if (m == null)
break;
isMsgReceived = true;
if (m instanceof TextMessage) {
processMessage(m);
else
SchLogger.MQ.debug("Strange...not a text message " + m);
}catch(Exception e){
SchLogger.MQ.info("Exception thrown in startListener() method " + e);
if(counter == 500) {
SchLogger.MQ.debug("committing after 500");
try {
session.commit();
} catch (Exception e1) {
e1.printStackTrace();
counter = 0;
} catch (Throwable je) {
je.printStackTrace();
} finally {
if(session != null){
try {
session.commit();
session.close();
} catch (JMSException ignored) {
session = null;
if (connection != null) {
try {
connection.close();
} catch (Exception e) {
e.printStackTrace();
XMLMsgReceiver.isRunning = false;
}Please advice!! If you can direct me to some docs which could help me resolving this issue that would also be great!!!
TIA,

Answer 1

Hi,
Check any exclusion indicator in condition type of NAVS which act not to include in pricing calculation in PO but at the same time condition type nAVS will be there in MM calculation schema.
As you said you have two condition type NAVS and NAVM and defaulted automatically in some cases, check both condition types (M/06) and find out exclusion indicator ( X or N or which one assigned) for each condition type which play vital role on each purchasing process.
Regards,
Biju K