AHS REST API can return NullPointerException

[prabhu@prabhu2 root]$ curl --negotiate -u: 'http://<ATS IP>:8188/ws/v1/applicationhistory/apps?queue=test'
{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException"}

2017-08-17 17:54:54,128 WARN  webapp.GenericExceptionHandler (GenericExceptionHandler.java:toResponse(98)) - INTERNAL_SERVER_ERROR
java.lang.NullPointerException
        at org.apache.hadoop.yarn.server.webapp.WebServices.getApps(WebServices.java:191)
        at org.apache.hadoop.yarn.server.applicationhistoryservice.webapp.AHSWebServices.getApps(AHSWebServices.java:96)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)