2021-07-26T03:51:15,484 | ERROR | Framework stop - Equinox Container: a89c8372-1e32-4c35-8320-2e341d4c405f | ConnectedGraphServer             | 250 - org.opendaylight.bgpcep.graph-impl - 0.16.1 | bundle org.opendaylight.bgpcep.graph-impl:0.16.1 (250)[org.opendaylight.graph.impl.ConnectedGraphServer(130)] : The close method has thrown an exception
java.lang.NullPointerException: null
        at org.opendaylight.graph.impl.ConnectedGraphImpl.clear(ConnectedGraphImpl.java:299) ~[?:?]
        at org.opendaylight.graph.impl.ConnectedGraphServer.destroyOperationalGraphModel(ConnectedGraphServer.java:146) ~[?:?]
        at org.opendaylight.graph.impl.ConnectedGraphServer.close(ConnectedGraphServer.java:87) ~[?:?]
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
        at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
        at org.apache.felix.scr.impl.inject.methods.BaseMethod.invokeMethod(BaseMethod.java:244) ~[bundleFile:?]
        at org.apache.felix.scr.impl.inject.methods.BaseMethod.access$500(BaseMethod.java:41) ~[bundleFile:?]
        at org.apache.felix.scr.impl.inject.methods.BaseMethod$Resolved.invoke(BaseMethod.java:685) ~[bundleFile:?]
        at org.apache.felix.scr.impl.inject.methods.BaseMethod.invoke(BaseMethod.java:529) [bundleFile:?]
        at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:318) [bundleFile:?]
        at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:308) [bundleFile:?]
        at org.apache.felix.scr.impl.manager.SingleComponentManager.disposeImplementationObject(SingleComponentManager.java:421) [bundleFile:?]
        at org.apache.felix.scr.impl.manager.SingleComponentManager.deleteComponent(SingleComponentManager.java:165) [bundleFile:?]
        at org.apache.felix.scr.impl.manager.AbstractComponentManager.doDeactivate(AbstractComponentManager.java:853) [bundleFile:?]