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Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

Dubbo Java 3.3

Steps to reproduce this issue

While researching Dubbo's EventBus mechanism today, I discovered some hidden bugs in the code. Therefore, I am proposing fixes as follows:

• No null-check for the event object itself, which may lead to a NullPointerException

• No type validation using instanceof before performing type casting.

• tryInvoke is a public method and is called frequently, but it lacks a null-check for the runnable object.

What you expected to happen

Improve null-check operations and type validation. Of course, I am happy to submit a PR to complete this work.

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct