In org.jboss.remoting3.test.remote.RemoteMessageHandlerTestCase, test method testReplyExceptionAbort() (currently commented) sends an exception over the wire, and the request listener sends it back. But on the return trip, the exception's writeObject() method throws an exception. So

1. RequestContextImpl.sendReply() calls OutboundReplyHandler.sendReply() to write the exception for its return trip

2. OutboundReplyHandler.sendReply() tries to write the exception

2. the exception's writeObject() throws an exception

3. RequestContextImpl.sendReply() catches the exception and calls

SpiUtils.safeHandleException(replyHandler, new RemoteReplyException("Remote reply failed", e));

4. SpiUtils.safeHandleException() calls OutboundReplyHandler.handleException().

The problem is that the call to OutboundReplyHandler.sendReply() sets OutboundReplyHandler.done to true, and the call to OutboundReplyHandler.handleException() turns into a no-op.