Improved panic message when MutableSideEffect not found during replay (…

…#656)
cadence-workflow · May 3, 2019 · c99d7e5 · c99d7e5
1 parent e36f385
commit c99d7e5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/internal/internal_event_handlers.go b/internal/internal_event_handlers.go
@@ -569,7 +569,7 @@ func (wc *workflowEnvironmentImpl) MutableSideEffect(id string, f func() interfa
 
 	if wc.isReplay {
 		// This should not happen
-		panic("MutableSideEffect with given ID not found during replay")
+		panic(fmt.Sprintf("Non deterministic workflow code change detected. MutableSideEffect API call doesn't have a correspondent event in the workflow history. MutableSideEffect ID: %s", id))
 	}
 
 	return wc.recordMutableSideEffect(id, wc.encodeValue(f()))