ConcurrentModificationException in HandshakeCompletedNotify-Thread

STR:

1) Unzip and run EAP
2) Follow https://tcms.engineering.redhat.com/case/46252/?from_plan=2296
3) Go to https://localhost:8443/rt/controller?action=viewCarList
4) Do repeated requests (holding F5 is fast enough) until you see the stacktrace below.

14:05:46,987 ERROR [STDERR] Exception in thread "HandshakeCompletedNotify-Thread"
14:05:46,988 ERROR [STDERR] java.util.ConcurrentModificationException
14:05:46,989 ERROR [STDERR] at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
14:05:46,989 ERROR [STDERR] at java.util.HashMap$EntryIterator.next(HashMap.java:834)
14:05:46,989 ERROR [STDERR] at java.util.HashMap$EntryIterator.next(HashMap.java:832)
14:05:46,989 ERROR [STDERR] at com.sun.net.ssl.internal.ssl.SSLSocketImpl$NotifyHandshakeThread.run(SSLSocketImpl.java:2188)

---------------------------------------------------------------------------------------------------------------------------
For the case the test case would disappear from TCMS, here are the instructions.

stop EAP
configure HTTPS connector
copy resources/localhost.keystore to ${jboss.server.home.dir}/conf
edit deploy/jboss-web.deployer/server.xml:
<Connector port="8443" address="${jboss.bind.address}"
maxThreads="100" minSpareThreads="5" maxSpareThreads="15"
scheme="https" secure="true" clientAuth="false" SSLEnabled="true"
truststoreFile="${jboss.server.home.dir}/conf/localhost.keystore"
truststorePass="unit-tests-server"
keystoreFile="${jboss.server.home.dir}/conf/localhost.keystore"
keystorePass="unit-tests-server" sslProtocol = "TLS" />

deploy lib/rt.war
mkdir ${jboss.server.home.dir}/log/rt
touch ${jboss.server.home.dir}/log/rt/rt_rt.log