Getting a weird message that seems to stall the website when running tomcat

I keep getting lots of these warnings in my logs:

WARN o.atmosphere.cpr.DefaultBroadcaster - Duplicate resource fda35646-a562-4366-933a-ba93a01297ea. Could be caused by a dead connection not detected by your server. Replacing the old one with the fresh one

and:

WARN c.v.server.ConnectorResourceHandler - Ignoring connector request for no-existent connector 7866 in root 1

As well sometimes the whole website seems to just kind of lock up, where no actions are possible. I’m still trying to connect the log errors with these lockups but either way as soon as I do a refresh of the page everything is back to normal. It’s intermittent but seems to happen several times a day in my testing.

Any assistance with this would be greatly appreciated.

Regards,
Steph