Jenkins is not showing any feedback and doesn't either update its matrix-based security, for the moment I cannot modify any user or group in this matrix, the only feedback I get comes from the log which is the following:

Jan 09, 2015 7:35:17 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: HttpParser Full for SCEP@57dd0c13

{l(/127.0.0.1:36187)<->r(/127.0.0.1:9090),s=1,open=true,ishut=false,oshut=false,rb=false,wb=false,w=true,i=1r}

-{AsyncHttpConnection@7143e075,g=HttpGenerator

{s=0,h=-1,b=-1,c=-1}

,p=HttpParser

{s=-1,l=7266,c=21549}

,r=0}

Thanks a lot for your attention