Drive 6.0: random test failure on TestESAuditChangeFinderClusteringEnabled

17:29:58 Running org.nuxeo.drive.elasticsearch.TestESAuditChangeFinderClusteringEnabled
17:30:02 Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.514 sec <<< FAILURE! - in org.nuxeo.drive.elasticsearch.TestESAuditChangeFinderClusteringEnabled
17:30:02 testClusteringEnabled(org.nuxeo.drive.elasticsearch.TestESAuditChangeFinderClusteringEnabled)  Time elapsed: 2.529 sec  <<< FAILURE!
17:30:02 java.lang.AssertionError
17:30:02 	at org.junit.Assert.fail(Assert.java:86)
17:30:02 	at org.junit.Assert.assertTrue(Assert.java:41)
17:30:02 	at org.junit.Assert.assertTrue(Assert.java:52)
17:30:02 	at org.nuxeo.drive.service.AuditChangeFinderClusteringEnabledTestSuite.testClusteringEnabled(AuditChangeFinderClusteringEnabledTestSuite.java:71)
17:30:02 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
17:30:02 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
17:30:02 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
17:30:02 	at java.lang.reflect.Method.invoke(Method.java:606)
17:30:02 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
17:30:02 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
17:30:02 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
17:30:02 	at org.nuxeo.runtime.test.runner.FeaturesRunner$InvokeMethod.evaluate(FeaturesRunner.java:442)
17:30:02 	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
17:30:02 	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
17:30:02 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
17:30:02 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
17:30:02 	at org.nuxeo.runtime.test.runner.FeaturesRunner.runChild(FeaturesRunner.java:397)
17:30:02 	at org.nuxeo.runtime.test.runner.FeaturesRunner.runChild(FeaturesRunner.java:55)
17:30:02 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
17:30:02 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
17:30:02 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
17:30:02 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
17:30:02 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
17:30:02 	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
17:30:02 	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
17:30:02 	at org.nuxeo.runtime.test.runner.FeaturesRunner.run(FeaturesRunner.java:361)
17:30:02 	at org.junit.runners.Suite.runChild(Suite.java:127)
17:30:02 	at org.junit.runners.Suite.runChild(Suite.java:26)
17:30:02 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
17:30:02 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
17:30:02 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
17:30:02 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
17:30:02 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
17:30:02 	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
17:30:02 	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
17:30:02 	at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
17:30:02 	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:113)
17:30:02 	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:85)
17:30:02 	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:54)
17:30:02 	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:134)
17:30:02 	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
17:30:02 	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
17:30:02 	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)