io.reactivex.rxjava3.exceptions.UndeliverableException: The exception could not be delivered to the consumer because it has already canceled/disposed the flow or the exception has nowhere to go to begin with

[changjiajie]

Thanks for using RxJava but before you post an issue, please consider the following points:

• Please include the library version number, including the minor and patch version, in the issue text. In addition, if you'd include the major version in the title (such as 3.x) that would be great.

• If you think you found a bug, please include a code sample that reproduces the problem. Dumping a stacktrace is usually not enough for us.

• RxJava has more than 150 operators, we recommend searching the javadoc for keywords of what you try to accomplish.

• If you have a question/issue about a library/technology built on top of RxJava (such as Retrofit, RxNetty, etc.), please consider asking a question on StackOverflow first (then maybe on their issue list).

• Questions like "how do I X with RxJava" are generally better suited for StackOverflow (where it may already have an answer).

• Please avoid cross-posting questions on StackOverflow, this issue list, the Gitter room or the mailing list.

[akarnokd]

https://github.com/ReactiveX/RxJava/wiki/What's-different-in-2.0#error-handling