possible problem with OperatorRetry and nested subscription

[petermd]

as reported on the Group there is a problem with OperatorRetry in combination with other operators.

i think the issue might be because OperatorRetry re-uses the child Subscriber inner CompositeSubscription causing it to be inadvertently completed (so re-subscribe fails).

https://github.com/Netflix/RxJava/blob/master/rxjava-core/src/main/java/rx/operators/OperatorRetry.java#L85

I've added a test and the suggested fix (just use a new Subscriber) which does address the problem.

petermd@d9fef71

FYI Might also be related #1023.

[zsxwing]

Thank you. I think you are right. I added some comment on your commit. Could you send a RP?

[benjchristensen]

Fixed in #1027

Thanks @petermd