I see a lot of tests fail with the following:
Exception in thread "main" java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(java.base@9-internal/ArrayList.java:935)
at java.util.ArrayList$Itr.next(java.base@9-internal/ArrayList.java:885)
at org.openjdk.jcstress.link.BinaryLinkServer.terminate(BinaryLinkServer.java:65)
at org.openjdk.jcstress.JCStress.run(JCStress.java:131)
at org.openjdk.jcstress.Main.main(Main.java:60)

This was seen running this:
  Hardware threads in use/available: 4/4, using Thread.onSpinWait()
  Test preset mode: "default"
  Writing the test results to "jcstress.1466794727687"
  Parsing results to "results/"
  Running each test matching "org.openjdk.jcstress.tests.seqcst.volatiles.L1_L2__L2_L1__S1__S2_Test" for 1 forks, 5 iterations, 1000 ms each
  Solo stride size will be autobalanced within [10, 10000] elements