Events from S/4HANA cloud not received by Event Mesh

[mnigbor]

I am attempting to configure a new S/4HANA Cloud and Business Technology Platform for side-by-side extension development using Extending SAP Solutions Using Automated Configurations | SAP Help Portal as a guide.

I'm using this GitHub project to test my configuration. SAP-samples/cloud-extension-s4hana-cloud-business-process: This sample showcases how to complement a...

The process seems to have gone OK, but when I test it, no events arrive at the application.

I found a troubleshooting guide here: Enterprise Event Enablement: Troubleshooting | SAP Blogs which I used to guide this post.

Apologies for all the screenshots, I hope someone will see a problem in one of them. There are questions in BOLD.

The first step in the troubleshooting guide is a connectivity check in S/4HANA, which is successful:

A wildcard Business Partner events (sap/s4/beh/businesspartner/v1/BusinessPartner/*) was added to the outbound topics in a channel named SAP_CP_XF_UDC1. These are bound to the udc1 Event Mesh client.

In the udc1 client in Event Mesh, I can see two events defined. I'm not sure exactly how these events got here, but the look OK to me. Question: Does it matter that only a subset of outbound topics defined in the S/4HANA channel events are listed here?

In the troubleshooting guide, it says "Note: The Topic Space needs to match the namespace that was defined in the Enterprise Messaging service instance."

In my system, the namespace is sap\HANAOD\udc1

In S/4HANA Cloud, I found Topic space in the Communication Arrangement (Not in the Channel). Question: Am I right that the topic space is in Communication Arrangement, not the Channel? If so, my configuration looks right: sap/S4HANAOD/udc1

Next, I check to make sure the second EM client (ems-sap-gis) is able to subscribe to topics in the S/4HANA client (udc1). Here is the JSON from the ems-sap-gis client:

{
  "options": {
    "management": true,
    "messagingrest": true,
    "messaging": true
  },
  "namespace": "udc/sapgis/ems-s4hc",
  "rules": {
    "topicRules": {
      "publishFilter": [
        "${namespace}/*"
      ],
      "subscribeFilter": [
        "${namespace}/*",
        "sap/S4HANAOD/udc1/*"
      ]
    },
    "queueRules": {
      "publishFilter": [
        "${namespace}/*"
      ],
      "subscribeFilter": [
        "${namespace}/*"
      ]
    }
  },
  "version": "1.1.0",
  "emname": "ems-sap-gis"
}<br>

I created a queue and added topics for the two events defined in the S/4HANA client (udc1). I also pushed the geo app, which also created a queue that subscribes to the same topics.

To test, I went back to S/4HANA and changed a Business Partner. I checked the "Business Event Queue" app and confirmed that a new event is in the queue. I'm not sure, but I think the fact that I see multiple events in "Business Event Queue" means that things are stuck in S/4HANA.

Alas, there's nothing in the queue in Event Mesh.

tobias.griebe : S/4HANA events are not making it to Event Mesh and I'm sure it's because I've made a configuration mistake. I'd appreciate it if you could you look this over and see if you can find my mistake(s).

[Tobias_Griebe]

Hi mnigbor,

I already had a look at your question on friday and couldn't identify any misconfiguration at first glance.
Again I went through all the details and couldn't spot any obvious issues.

As long as you don't have any consumer attached to your queue, you should see the events from S/4 being subscribed by your queue.

All your other observations are correct. In the event catalog on BTP, you see the BuPa.created and BuPa.changed events, because those are the only ones actually exposed by the BusinessPartner object. You can double-check the same here: https://api.sap.com/event/CE_BUSINESSPARTNEREVENTS/overview.
The namespace maintained in Event Mesh on BTP actually reflects in the topic space of the Communication Arrangement, not the the Channel - also correct.

The only option I see is to make sure that the events are actually raised by the S/4 system to Event Mesh. Unfortunately this can only be done via support request with the current release, to my knowledge. Can you please open an incident on component OPU-XBE. With that the colleagues get access to your S/4 system and can verify that the events are actually exposed by the S/4 system. You can link in your ticket to this question, so you don't need to provide all the details again.

Sorry for the inconvenience,
Tobias

[mnigbor]

Thank you for taking the time to look at this. I will open an incident.