IBM BPM, V8.0.1, All platforms > Get started with IBM BPM > Key concepts > BPEL processes and human tasks > BPEL processes overview > Fault and compensation handling in BPEL processes > Compensation handling in BPEL processes
Compensation handling in BPEL microflows
Compensation for microflows is also known as technical compensation. This type of compensation is triggered when the transaction, or the activity session, that contains the microflow is rolled back.
Typically, undo actions are specified in the process model for activities that cannot be reversed by rolling back the transaction. When a process instance runs, undo actions for compensable activities are registered with the enclosing unit of work. Depending on the outcome of the rollback or commit, compensation starts.
If the microflow is a child of a compensable, long-running process, the undo actions of the microflow are made available to the parent process when the microflow completes. It can, therefore, potentially participate in the compensation of the parent process. For these types of microflows, specify undo actions for all of the activities in the process when you define your process model.
If a fault occurs during compensation processing, the compensation action requires manual resolution to overcome the fault. You can use Business Process Choreographer Explorer to repair these compensation actions.