Exception handling utilities, safe subscriber exception classes, lifecycle exception classes.


Exceptions Utility class to help propagate checked exceptions and rethrow exceptions designated as fatal. 


CompositeException Represents an exception that is a composite of one or more other exceptions. 
MissingBackpressureException Indicates that an operator attempted to emit a value but the downstream wasn't ready for it. 
OnErrorNotImplementedException Represents an exception used to signal to the RxJavaPlugins.onError() that a callback-based subscribe() method on a base reactive type didn't specify an onError handler. 
ProtocolViolationException Explicitly named exception to indicate a Reactive-Streams protocol violation. 
UndeliverableException Wrapper for Throwable errors that are sent to `RxJavaPlugins.onError`.