Integration Server 10.3 | Integration Server Administrator's Guide | Debugging Service Exceptions Using the Error Log | Interpreting the Error Log | Understanding the Error Messages
 
Understanding the Error Messages
When you specify detailed exception logging, the error log's Error Message column shows the error message that corresponds to the exception and a concatenation of the error messages from each of the nested exceptions. The format of these messages is as follows:
Outer exception message
Caused by: middle.exception.className: Middle exception message
Caused by: inner.exception.className: Inner exception message
In addition to the standard error message text that Integration Server provides (for example, "[ISS.0062.9021] "object" is null"), exception messages may also contain additional, customized text that a service developer provides in the error handling portion of the service.