mjr

OK. It is working now. My son was able to login to my minecraft server+forge. What we tried was having my son install forge on his computer as well. When he ran minecraft, he used his forge profile. No more Netty errors. Is it safe to assume that there is something subtly different about the Netty protocol used by Minecraft Client vs Forge Client? Or has it always been a requirement that clients wishing to login to a server running forge, should be running forge themselves? Thank you!

I am seeing the same error. I am new to minecraft forge - I keep a Minecraft Server running for my son and his friends - they asked me to figure out if I could add mods to the server, so I started fiddling with it. Managed to get forge 1.7.10 installer and get it working, sort of, with my 1.7.10 server. When I run forge, it opens the MCServer jar file ok, and all looks fine till someone tries to login to my server. Below is the Log/chat text -- with some repetitive lines removed. [20:34:52] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker [20:34:52] [main/INFO] [FML]: Forge Mod Loader version 7.10.18.1180 for Minecraft 1.7.10 loading [20:34:52] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.7.0_60, running on Windows 7:amd64:6.1, installed at C:\myd\1_7_10_MMSMOD\JDK64_7_60\jre [20:34:52] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker [20:34:52] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper [20:34:54] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557 [20:34:54] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper [20:34:54] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLDeobfTweaker [20:34:55] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.server.MinecraftServer} [20:34:59] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting minecraft server version 1.7.10 [20:34:59] [server thread/INFO] [MinecraftForge]: Attempting early MinecraftForge initialization [20:34:59] [server thread/INFO] [FML]: MinecraftForge v10.13.0.1180 Initialized [20:34:59] [server thread/INFO] [FML]: Replaced 182 ore recipies [20:34:59] [server thread/INFO] [MinecraftForge]: Completed early MinecraftForge initialization [20:35:00] [server thread/INFO] [FML]: Searching C:\myd\1.7.10 MMSJar\mods for mods [20:35:00] [server thread/INFO] [FML]: Forge Mod Loader has identified 3 mods to load [20:35:02] [server thread/INFO] [FML]: Processing ObjectHolder annotations [20:35:02] [server thread/INFO] [FML]: Found 341 ObjectHolder annotations [20:35:02] [server thread/INFO] [FML]: Configured a dormant chunk cache size of 0 [20:35:02] [server thread/INFO] [FML]: Applying holder lookups [20:35:02] [server thread/INFO] [FML]: Holder lookups applied [20:35:02] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Loading properties [20:35:02] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Default game type: CREATIVE [20:35:02] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Generating keypair [20:35:02] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Starting Minecraft server on *:25564 [20:35:04] [server thread/INFO] [FML]: Forge Mod Loader has successfully loaded 3 mods [20:35:04] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Preparing level "world" [20:35:04] [server thread/INFO] [FML]: Injecting existing block and item data into this server instance [20:35:04] [server thread/INFO] [FML]: Applying holder lookups [20:35:04] [server thread/INFO] [FML]: Holder lookups applied [20:35:04] [server thread/INFO] [FML]: Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@6016abf5) [20:35:04] [server thread/INFO] [FML]: Loading dimension 1 (world) (net.minecraft.server.dedicated.DedicatedServer@6016abf5) [20:35:05] [server thread/INFO] [FML]: Loading dimension -1 (world) (net.minecraft.server.dedicated.DedicatedServer@6016abf5) [20:35:05] [server thread/INFO] [net.minecraft.server.MinecraftServer]: Preparing start region for level 0 [20:35:06] [server thread/INFO] [net.minecraft.server.MinecraftServer]: Preparing spawn area: 2% [20:35:07] [server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Done (3.456s)! For help, type "help" or "?" [20:37:06] [user Authenticator #1/INFO] [net.minecraft.server.network.NetHandlerLoginServer]: UUID of player arch55 is 241e7b3e-5098-41fb-8005-9ac828971d0d [20:37:09] [Netty IO #1/INFO] [FML]: Unexpected packet during modded negotiation - assuming vanilla or keepalives : net.minecraft.network.play.client.C00PacketKeepAlive . . . . . [20:37:50] [Netty IO #1/INFO] [FML]: Unexpected packet during modded negotiation - assuming vanilla or keepalives : net.minecraft.network.play.client.C00PacketKeepAlive [20:37:52] [Netty IO #1/INFO] [FML]: Unexpected packet during modded negotiation - assuming vanilla or keepalives : net.minecraft.network.play.client.C00PacketKeepAlive [20:37:54] [server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: arch55 lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}} [20:37:54] [server thread/INFO] [net.minecraft.server.MinecraftServer]: arch55 left the game So, I'm not sure what to try. I see several other folks have experienced the same error message -- it only stops repeating when the user attempting to login gives up. Here is the string I'm using to start up the server, perhaps I've accidentally done something wrong here? C:\myd\1_7_10_MMSMOD\JDK64_7_60\bin\java.exe -Xmx1024M -Xms1024M -jar forge-1.7.10-10.13.0.1180-universal.jar Thanks!