Solution : https://service.sap.com/sap/support/notes/803145 (SAP Service marketplace login required)
Summary :
When utilizing SAP XI 3.0 or 7.0 Adapter Framework, failures might occur during message transmission from the Integration Server or an Adapter towards the Adapter Engine, resulting in an HTTP 503 error. This issue arises primarily due to the server's inability to handle the request because of overloading or non-registered Listener Beans which prevent the persistence of messages. To resolve this, ensure the J2EE server's accessibility, increase the "pollAttempts" parameter to 100 in the "SAP XI AF Messaging" and "SAP XI AF Core" services for all relevant connections and restart necessary services. Additionally, consider increasing the number of application threads if problems persist.
Key words :
usr\sap\<sid>\<inst>\work\std_server0, sap xi af core service, <port>/messagingsystem/receive/afw/xi, sap xi af messaging service, <port>/messagingsystem/receive/<connection>/<protocol>, sap xi af core, sap xi af messaging, 50000/messagingsystem/receive/afw/xi, log-specific event handler, http status code definitions
Related Notes :
| 937159 | XI Adapter Engine is stuck |
| 870270 | FAQ note for initiating Support related to ISpeak Adapters |
| 816022 | FAQ: XI/PI 3.0/7.0/7.1 J2EE Adapter Engine/Messaging System |