RocketMQ send message async cause the NullPointerException

[hellochenpc]

Describe the bug
RocketMQ send message async will cause the NullPointerException.

The exception stacktrace is that:

When we use RocketMQ send the message async, the SendResult will be NULL. The part of RocketMQ Client code is:

After send message, RocketMQ Client will execute the method 'executeSendMessageHookAfter' to do the method 'sendMessageAfter' of all 'SendMessageHook'. The SendMessageHook of Opentelemetry will get the messageId from SendResult (but it's NULL), so the NullPointerException occurs: