The usual default actions for warnings to completely ignore the warning—since it doesn't prevent parsing and processing—or to issue an informational message and continue on.
The default behavior is to handle these responses synchronously so that the container waits for the response message and does not continue processing in that thread.
默认行为是同步处理这些响应,以便容器等待响应消息,不在那个线程中继续处理。
3
The default exceptional handler can block the message consumption when a single poisoned message processing is failed.