Print panic stack traces (#921)

(cherry picked from commit d02ab00)

Author: deliahu

pkg/lib/cron/cron.go

@@ -71,6 +71,8 @@ func (c *Cron) Cancel() {
 
 func recoverer(errHandler func(error)) {
 	if errInterface := recover(); errInterface != nil {
-		errHandler(errors.CastRecoverError(errInterface))
+		err := errors.CastRecoverError(errInterface)
+		errors.PrintStacktrace(err)
+		errHandler(err)
 	}
 }

pkg/lib/exit/exit.go

@@ -63,7 +63,6 @@ func Panic(err error, wrapStrs ...string) {
 func RecoverAndExit(strs ...string) {
 	if errInterface := recover(); errInterface != nil {
 		err := errors.CastRecoverError(errInterface, strs...)
-		errors.PrintErrorForUser(err)
-		os.Exit(1)
+		Panic(err)
 	}
 }

pkg/operator/endpoints/respond.go

@@ -63,6 +63,7 @@ func respondErrorCode(w http.ResponseWriter, r *http.Request, code int, err erro
 func recoverAndRespond(w http.ResponseWriter, r *http.Request, strs ...string) {
 	if errInterface := recover(); errInterface != nil {
 		err := errors.CastRecoverError(errInterface, strs...)
+		errors.PrintStacktrace(err)
 		telemetry.Error(err)
 		respondError(w, r, err)
 	}