Srimanth Gunturi created AMBARI-7836:
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             Summary: Slider View: Unable to create app, 500 error on POST 
request
                 Key: AMBARI-7836
                 URL: https://issues.apache.org/jira/browse/AMBARI-7836
             Project: Ambari
          Issue Type: Bug
          Components: contrib
    Affects Versions: 1.7.0
            Reporter: Srimanth Gunturi
            Assignee: Srimanth Gunturi
             Fix For: 1.7.0


After hitting 'Finish' button in Create App Wiazrd, POST request 
{code}api/v1/views/SLIDER/versions/1.0.0/instances/{instanceName}/apps{code} 
returns 500 error with message: {code}Server Error{code}

Exception:
{code}
10:38:31,872  WARN [qtp1316535515-167] ServletHandler:514 - 
/api/v1/views/SLIDER/versions/1.0.0/instances/s0/apps
java.lang.NullPointerException
        at 
org.apache.ambari.view.slider.SliderAppsViewControllerImpl.getUserToRunAsKeytab(SliderAppsViewControllerImpl.java:1178)
        at 
org.apache.ambari.view.slider.SliderAppsViewControllerImpl.createSliderApp(SliderAppsViewControllerImpl.java:1094)
        at 
org.apache.ambari.view.slider.rest.SliderAppsResource.createApp(SliderAppsResource.java:132)
        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 
com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at 
com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
        at 
com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        at 
com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
        at 
com.sun.jersey.server.impl.uri.rules.SubLocatorRule.accept(SubLocatorRule.java:134)
        at 
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
{code}



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