Yo CorDapp does not run against 4.0-SNAPSHOT - corda

Question

After some trivial tweaks in build.gradle:
corda_release_version to say, 4.0-SNAPSHOT-sean
corda_gradle_plugins_version to 4.0.23
quasar_version to '0.7.10'
And repositories:
maven { url 'https://jitpack.io' }
maven { url 'https://ci-artifactory.corda.r3cev.com/artifactory/corda-releases' }
maven { url 'https://dl.bintray.com/kotlin/kotlin-eap/' }
And in deployNodes task:
adding rpcSettings to the notary
removing finance from cordapps
The Yo CorDapp can stand up with three nodes: Notary, PartyA and PartyB.
The issue is that after a single /api/yo/yos query, the whole thing becomes frozen. All apis come back with HTTP ERROR 500, the debugging ports not working, trace logs show some artemis errors.
My setup: java version "1.8.0_172" on macOS 10.31.1.
It would be helpful to get at least the simplest CorDapp to run against the SNAPSHOT.
\Sean

Answer 1

You're not doing anything wrong here. We run continuous integration on the master branch but (unlike the release-Vx branches) we can't make any guarantees about the master branch working at any point in time.
I replicated your steps, and in my case, I got the following error:
[WARN ] 2018-06-14T14:18:22,744Z [Thread-11 (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$5#d15f031)] core.client.fail - AMQ212037: Connection failure has been detected: AMQ119014: Did not receive data from /127.0.0.1:55037 within the 60,000ms connection TTL. The connection will now be closed. [code=CONNECTION_TIMEDOUT] {}