Since jwebserver is configured with a single thread executor it is important to ensure this thread does not block unnecessarily. Unfortunately, any https request to the server causes such a block because the server is waiting for a plaintext http request header block but receives the initial binary handshake message for TLS.

The "sun.net.httpserver.maxReqTime" system property can be set to limit the time waiting for a request to arrive. Given that the server is only serving static GET requests, a reasonable value to set for this property could be a few seconds.