The following test failes for 8 last runs at Jenkins:

Tests run: 19, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 84.69 sec <<< FAILURE!
testValidationContextCleanedUpIntegration(org.jboss.tools.jst.web.kb.test.validation.KBValidationTest) Time elapsed: 8.652 sec <<< FAILURE!
junit.framework.AssertionFailedError: null
at junit.framework.Assert.fail(Assert.java:47)
at junit.framework.Assert.assertTrue(Assert.java:20)
at junit.framework.Assert.assertTrue(Assert.java:27)
at org.jboss.tools.jst.web.kb.test.validation.KBValidationTest.testValidationContextCleanedUpIntegration(KBValidationTest.java:62)