1. Architecture overview
XI older than 7.3 are dual stack systems. The adapter engine with most of the adapters are running on the Java stack (JMS, HTTP, SOAP, …) while the adapters to connect XI to SAP systems are running on the abap stack.
Beside the adapter engine you find also the SLD (system landscape directory) and the RTW (runtime workbench) on the Java side.
Java and Abap stack are communicating with each other using technial users. If those user get locked (for example due to some security features which lock users if unauthorized access was detected with wrong password) the internal communication between the java and abap stack is broken.
The Java and the Abap stack have it’s own separte database and it is not possible to access the java database from abap directly or vice versa.
2. Implications of broken internal communication
If for a certain time the internal communication was broken, some of the messages may not be processed correctly. I detected such situation for example for inbound wholesaler orders.
If you are processing a lot messages it is easy to find out which orders are not processed correctly. Depending on the used adapter you may have to look in every message payload via the runtime workbench.
3. Automatic Adapter Engine Message Monitoring
To make the monitoring easier I have implemented a Java Enterprise application (EAR/WAR) for XI which has access to the java database where the runtime workbench messages are stored. By providing a webbased technical interface to access the java database tables, all messages can be continuously downloaded and processed in a external monitoring tool so that not processed order numbers can be displayed as alerts to the responible persons. The relevant database table is: XI_AF_MSG
Attention: Before you can access the java database of your XI system, you have to define some datasource in Visual Administrator.
If you want to centralize your data in a data lake it is now easy to write the data flow to hadoop where XI data and ERP/CRP/BW data can be stored so that you have the possibility to analize them together!