Issues in Queuing mechanism(FIFO) in PI

[Former Member]

Hi PI Experts,

In my project PI will use a queuing mechanism based on a FIFO methodology. This introduces a single point of failure where if a message flowing through gets stuck for any reason the entire queue will get stuck.

Can anybody tell me the options available that be manual or automatic for reducing the turnaround time for detection and / or resolution or the utopia of removing this single point of failure all together.

Thanks,

Loveena.

[sugata_bagchi2]

Hi,

You can write a program in ABAP, in case of error in the message queue, that message will be transferred to an error queue.

Thanks

Sugata B Majumder

[Former Member]

Hi,

Following are the options available for this.

1. Avoid EOIO Quality of service to block the other messages (if you are using EO ) then remove the check Maintain order at runtime option in ID..

2. If first option cannot be done then configure CCMS alert mechanism to get trigger the Alerts.

/people/aravindh.prasanna/blog/2006/02/20/configuring-scenario-specific-e-mail-alerts-in-xi-ccms-part-3

3. From PI 7.3 onwards backup queue option will be avaialbe for handling these things..

/people/rajeshkumar.pasupula/blog/2010/12/16/more-performance-feature-offerings-from-pi-73 (future purpose..)

HTH

Rajesh

[Former Member]

Hi Hareen,

Yes you are right, the approach would be QOS: Exactly once in order.

When you say we need to write a program so this program would a report that would be written in XI?

Can you elaborate on the program part that you mentioned?

Thanks,

Loveena

[RKothari]

Hello,

Also check the below blog on raising an alert for queue errors.

/people/santhosh.kumarv/blog/2009/05/19/sap-xipi-alerts-for-queue-errors

-Rahul

[Former Member]

Yes, you need to write a program in XI system using SE38 transaction.

I think there is direct program for cancellation of error messages ie. RSXMB_CANCEL_NOT_REST_MESSAGES - Cancel XI Messages With Errors That Cannot Be Restarted.

This is a standard SAP program that can be executed to cancel the messages.

Thanks,

[Former Member]

Hi Loveena,

can u please describe the interface?

As the queue mechanism is FIFO that means the Quality of Service is Exactly Once In Order. As you are following this, there is no direct approach to reduce the time around to get reid of it. Instead, you should write a program to cancel the message that got failed to process the remaining.

Else, you change the queue mechanism by changing the Quality of Service to Exactly once in Quality of service.

Thanks,