Build failure in wseb transport: WsebConnectorLoggingIT.shouldLogOpenAndCleanServerClose unexpected invocation: ioHandler.exceptionCaught(

[cmebarrow]

Happened in Travis build https://travis-ci.org/kaazing/gateway/builds/183751819. Console output for the failing test:
WsebConnectorLoggingIT.fail.txt

Extract:

WsebConnectorLoggingIT.shouldLogOpenAndCleanServerClose FAILED with exception java.lang.AssertionError: unexpected invocation: ioHandler.exceptionCaught(<(#00000104: kzg wseb, client, ws://localhost:8080/path?query => ws://localhost:8080/path?query)>, <java.io.IOException: Network connectivity has been lost or transport was closed at other end>)

[cmebarrow]

Happened again just now in a gateway build on Travis

[Anisotrop]

Happened again: https://travis-ci.org/kaazing/gateway/builds/219315787