The behavior of `HttpURLConnection` when using `ProxySelector` has been modified in this JDK release. `HttpURLConnection` used to fall back to a direct connection attempt if the configured proxy(s) failed to make a connection. Beginning with this release, the default behavior has been changed to no longer use a direct connection when the first proxy connection attempt fails.

A new system property, `sun.net.http.fallbackToDirect`, can be set to a value of "true" should an application need to fall back to the old behavior (fall back to a direct connection when the first proxy connection attempt fails).