Sometimes build is stucked and sometiemes it throws following exception when CORE module is running
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!! (testng-DistWriteSkewTest) Exiting because DistWriteSkewTest has NOT shut down all the cache managers it has started !!!!!!!
!!!!!! (testng-DistWriteSkewTest) See allocation stacktrace to find out where still-running cacheManager was created: !!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

java.lang.Throwable
at org.infinispan.test.fwk.TestCacheManagerFactory.addThreadCacheManager(TestCacheManagerFactory.java:373)
at org.infinispan.test.fwk.TestCacheManagerFactory.newDefaultCacheManager(TestCacheManagerFactory.java:356)
at org.infinispan.test.fwk.TestCacheManagerFactory.newDefaultCacheManager(TestCacheManagerFactory.java:68)
at org.infinispan.test.fwk.TestCacheManagerFactory.createClusteredCacheManager(TestCacheManagerFactory.java:160)
at org.infinispan.test.fwk.TestCacheManagerFactory.createClusteredCacheManager(TestCacheManagerFactory.java:151)
at org.infinispan.test.fwk.TestCacheManagerFactory.createClusteredCacheManager(TestCacheManagerFactory.java:125)
at org.infinispan.test.MultipleCacheManagersTest.addClusterEnabledCacheManager(MultipleCacheManagersTest.java:177)
at org.infinispan.test.MultipleCacheManagersTest.addClusterEnabledCacheManager(MultipleCacheManagersTest.java:162)
at org.infinispan.test.MultipleCacheManagersTest.createCluster(MultipleCacheManagersTest.java:196)
at org.infinispan.container.versioning.AbstractClusteredWriteSkewTest.createCacheManagers(AbstractClusteredWriteSkewTest.java:59)
at org.infinispan.test.MultipleCacheManagersTest.callCreateCacheManagers(MultipleCacheManagersTest.java:69)
at org.infinispan.test.MultipleCacheManagersTest.createBeforeMethod(MultipleCacheManagersTest.java:79)
at sun.reflect.GeneratedMethodAccessor151.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:611)

Add link to jenkins job
https://jenkins.mw.lab.eng.bos.redhat.com/hudson/view/JDG/view/FUNC/job/edg-60-ispn-testsuite-rhel-ibm6/USE_JDK=JDK6,jdk=ibm17,label=RHEL6_x86_64/