Hi Team,

I was working on the vDNS usecase and I was creating Service in SDC via ONAP 
Portal. When I logged out from portal, I receive the below exception. Now, 
Whenever I try to access the portal I get the below exception. Please suggest.


HTTP Status 500 -

type Exception report

message

description The server encountered an internal error that prevented it from 
fulfilling this request.

exception

java.lang.NullPointerException
        java.time.Instant.compareTo(Instant.java:1255)
        
org.onap.portalapp.music.conf.MusicSession.isExpired(MusicSession.java:280)
        
org.onap.portalapp.music.conf.MusicSession.isExpired(MusicSession.java:261)
        
org.onap.portalapp.music.conf.MusicSessionRepository.findById(MusicSessionRepository.java:113)
        
org.onap.portalapp.music.conf.MusicSessionRepository.findById(MusicSessionRepository.java:63)
        
org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.lambda$getRequestedSessionId$0(SessionRepositoryFilter.java:359)
        
java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
        java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1359)
        
java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
        
java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:498)
        java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)
        
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
        java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
        java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464)
        
org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getRequestedSessionId(SessionRepositoryFilter.java:360)
        
org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getSession(SessionRepositoryFilter.java:303)
        
org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getSession(SessionRepositoryFilter.java:196)
        
org.springframework.web.context.request.ServletRequestAttributes.updateAccessedSessionAttributes(ServletRequestAttributes.java:255)
        
org.springframework.web.context.request.AbstractRequestAttributes.requestCompleted(AbstractRequestAttributes.java:48)
        
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:988)
        
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
        
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        
org.onap.portalapp.filter.SecurityXssFilter.doFilterInternal(SecurityXssFilter.java:149)
        
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        
org.apache.catalina.filters.CorsFilter.handleNonCORS(CorsFilter.java:436)
        org.apache.catalina.filters.CorsFilter.doFilter(CorsFilter.java:177)
        
org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:146)
        
org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:81)


Best Regards,
Sangeeth G
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