A first request is received at a central tracing component and from a first module in a complex computing system. The first request is received when the first module is called to execute. In response to the first request, input data of the first module is stored in the central tracing component. A second request is received from the first module when the first module has been successfully executed. In response to the second request, output data of the first module is stored in the central tracing component. A third request is received from a second module when the second module has failed execution. In response to the third request, the stored data in the central tracing component is sent to the second module.