rundata.getContext().put(helperName, helper);
if (exception != null) {
int statusCode = -1;
String target = null;
LoggingDetail loggingDetail = defaultLoggingDetail;
Logger logger = defaultLogger;
// 从最根本的exception cause开始反向追溯,例如:t1 caused by t2 caused by t3,
// 那么,检查顺序为t3, t2, t1。
CAUSES: