Forge Server Repeating Error - Causing Server Lag/Crash

[RustyJP]

Apologies if this is the wrong place to ask for support on this issue but I'm unsure where else to get help. Running a modded forge 1.12.2-14.23.5.2847 server (MC Eternal Lite) and the server console keeps spamming this error:

 

[19:12:40] [Server thread/ERROR] [FML]: FMLIndexedMessageCodec exception caught
io.netty.handler.codec.EncoderException: io.netty.util.IllegalReferenceCountException: refCnt: 0
	at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:106) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1032) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:296) ~[minecraft_server.1.12.2.jar:?]
	at net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper.sendTo(SimpleNetworkWrapper.java:250) [SimpleNetworkWrapper.class:?]
	at com.mushroom.midnight.common.entity.BridgeTracker.sendToTracking(BridgeTracker.java:51) [BridgeTracker.class:?]
	at com.mushroom.midnight.common.entity.BridgeTracker.update(BridgeTracker.java:27) [BridgeTracker.class:?]
	at com.mushroom.midnight.common.entity.RiftBridge.tickState(RiftBridge.java:66) [RiftBridge.class:?]
	at com.mushroom.midnight.common.world.BridgeManagerServer.update(BridgeManagerServer.java:46) [BridgeManagerServer.class:?]
	at com.mushroom.midnight.common.CommonEventHandler.onWorldTick(CommonEventHandler.java:129) [CommonEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_965_CommonEventHandler_onWorldTick_WorldTickEvent.invoke(.dynamic) [?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) [ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) [EventBus.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.onPreWorldTick(FMLCommonHandler.java:287) [FMLCommonHandler.class:?]
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:752) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:397) [nz.class:?]
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]
Caused by: io.netty.util.IllegalReferenceCountException: refCnt: 0
	at io.netty.buffer.AbstractByteBuf.ensureAccessible(AbstractByteBuf.java:1408) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.buffer.UnpooledHeapByteBuf.capacity(UnpooledHeapByteBuf.java:114) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.buffer.UnpooledHeapByteBuf.setBytes(UnpooledHeapByteBuf.java:254) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1069) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1060) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1050) ~[minecraft_server.1.12.2.jar:?]
	at net.minecraft.network.PacketBuffer.writeBytes(PacketBuffer.java:1094) ~[gy.class:?]
	at com.mushroom.midnight.common.network.MessageBridgeState.toBytes(MessageBridgeState.java:35) ~[MessageBridgeState.class:?]
	at net.minecraftforge.fml.common.network.simpleimpl.SimpleIndexedCodec.encodeInto(SimpleIndexedCodec.java:30) ~[SimpleIndexedCodec.class:?]
	at net.minecraftforge.fml.common.network.simpleimpl.SimpleIndexedCodec.encodeInto(SimpleIndexedCodec.java:26) ~[SimpleIndexedCodec.class:?]
	at net.minecraftforge.fml.common.network.FMLIndexedMessageToMessageCodec.encode(FMLIndexedMessageToMessageCodec.java:81) ~[FMLIndexedMessageToMessageCodec.class:?]
	at io.netty.handler.codec.MessageToMessageCodec$1.encode(MessageToMessageCodec.java:67) ~[minecraft_server.1.12.2.jar:?]
	at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:88) ~[minecraft_server.1.12.2.jar:?]
	... 23 more

 

I can't determine what this error is, if it is a forge error or related to a mod. I'm not sure what other info would help solve this, so please let me know what other info to provide that may help. Any help would be appreciated. 

Edited July 1, 2020 by RustyJP

[DaemonUmbra]

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.