org.jboss.resteasy.test.RESTEASY1323Test fails quite often on Travis CI. The test fails because of timeout expired in callAsyncTwiceWithKeepAlive (responseLatch.await(); ). The output logs show that the latch is decreased only once. On server side, both requests are processed.
I can reproduce the problem by looping 'mvn post-integration' in server-adapters/resteasy-netty4 (usually needs 3-4 runs to reproduce)