Thread safety concerns in conduit implementations

There are several non-volatile fields in undertow conduit implementations which are accessed by multiple threads.

Example conduits: DeflatingStreamSinkConduit, AbstractFramedStreamSinkConduit, AbstractFixedLengthStreamSinkConduit, etc.

While debugging in a servlet environment using 3.1 asynchronous writes, the conduit is used by both worker and IO threads which unless I'm misinterpreting the code can interact in unexpected ways with the jit.