internal exceptio in io.netty

Client> [03:06:31] [Client thread/INFO]: Created: 512x256 textures/blocks-atlas
Client> [03:06:31] [Client thread/INFO]: Created: 256x256 textures/items-atlas
Client> [03:06:35] Netty Client IO #3/ERROR: Channel became inactive!
Client> [03:06:38] [Client thread/INFO]: Connecting to 198.15.117.74, 25580
Client> [03:06:38] Netty Client IO #5/ERROR: Channel became inactive!
Client> [03:06:55] Netty Client IO #1/ERROR: Channel became inactive!
Client> [03:06:58] Netty Client IO #6/ERROR: Channel became inactive!
Client> [03:07:08] [Client thread/INFO]: Stopping!

Unable to connect to ANY server. Minecraft has been uninstalled and reinstalled, Java is latest version.