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'namespace:default' already exists
co.cask.cdap.common.NamespaceAlreadyExistsException: 'namespace:default' 
 already exists	at co.cask.cdap.internal.app.namespace.DefaultNamespaceAdmin.create(DefaultNamespaceAdmin.java:166)	at co.cask.cdap.test.TestBase.initialize(TestBase.java:285)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)	at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)	at org.junit.rules.RunRules.evaluate(RunRules.java:20)	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)