The org.infinispan.server.test.client.rest.RESTReplicationIT tests always fail on Windows Server 2012 x64 machine.
E.g. org.infinispan.server.test.client.rest.RESTReplicationIT(distmode-tcp).testReplicationDelete fails with the following error:

java.lang.AssertionError: URI=http://127.0.0.1:8080/rest/___defaultcache/a expected:<200> but was:<409>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:555)
	at org.infinispan.server.test.client.rest.RESTHelper.post(RESTHelper.java:257)
	at org.infinispan.server.test.client.rest.RESTHelper.post(RESTHelper.java:233)
	at org.infinispan.server.test.client.rest.RESTHelper.post(RESTHelper.java:229)
	at org.infinispan.server.test.client.rest.RESTReplicationIT.testReplicationDelete(RESTReplicationIT.java:79)

You can find all failures here

The issue may be related to ISPN-6412.
There is also reported bugzilla for this issue during previous releases: https://bugzilla.redhat.com/show_bug.cgi?id=1158452

All the variants are failing:

• org.infinispan.server.test.client.rest.RESTClusteredIT(distmode-tcp)
• org.infinispan.server.test.client.rest.RESTClusteredIT(replmode-tcp)
• org.infinispan.server.test.client.rest.RESTClusteredIT(distmode-udp)
• org.infinispan.server.test.client.rest.RESTClusteredIT(replmode-udp)