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An error in an ABAP program that is running in the background generally causes an immediate termination of the background job. A background job is terminated, if, for example, the program does not correct the error or a division by zero takes place. If an ABAP program terminates, an ABAP dump is usually generated. This dump contains a description of the precise cause of the error.
Now for a dialog instance. If you want to distribute a system landscape across multiple servers, you require a central instance on a server and, on every other server, a dialog instance with a dispatcher and server in which you can then create additional server processes. Dialog instances are installed on application servers. The dialog instances of a Java system are called Java dialog instances.
Dialog instances are SAP instances that include only:
- Dispatcher, IGS and CCMS agents
- Java and Java Add-In system: Java server processes
- ABAP and Java Add-In system: Gateway and certain ABAP work processes (dialog, batch, spool, or update)
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