FULL PRODUCT VERSION :
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
The problem is not restricted to a particular OS version

A DESCRIPTION OF THE PROBLEM :
As part of the change

http://hg.openjdk.java.net/jdk9/dev/jdk/rev/ae10dd067bcd

which removes the HTTP proxy implementation, the marker interface RMISocketInfo and it's treatment in the implementation of the method TCPConnection.isReusable() has been removed. As a consequence, support for non-reusable sockets has been removed as well. This breaks our implementation of a custom socket factory - which basically tunnels RMI over HTTP.



REGRESSION. Last worked in version 8u144


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
As a workaround we could use bytecode instrumentation to change the behavior of TCPConnection.isReusable(). It would however be a way better solution to add the marker interface back.