libp2p connection closed exception...

[rolfyone]

Summary

Someone using teku was getting this in logs and I think it probably belongs here...

Expected behavior

can it be more cleanly handled when the connection is unexpectedly closed?

Actual behavior

teku  | 2026-03-09 15:05:27.001 INFO  - Slot Event  *** Slot: 13853725, Block: e77861b402bd9367c8c9d955c9f2e4dcd61c7ccaac282b4297cc199847e8c68f, Justified: 432927, Finalized: 432926, Peers: 80
teku  | 2026-03-09 15:05:39.000 INFO  - Slot Event  *** Slot: 13853726, Block: a9ee9ccd3d359bca29a69309e551a4e1d0c712b0d17ebf36f8c048eca48e839f, Justified: 432927, Finalized: 432926, Peers: 80
teku  | 2026-03-09 15:05:46.498 ERROR - PLEASE FIX OR REPORT | Unexpected exception thrown for nioEventLoopGroup-3-22
teku  | io.libp2p.core.ConnectionClosedException: The stream was closed for writing locally: a0423ffffe4c0ea0-00000001-001c6097-f8b1ce46912ef7f7-cbd0f5cd/8/false
teku  | at io.libp2p.etc.util.netty.mux.MuxChannel.doWrite(MuxChannel.kt:40)
teku  | at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:794)
teku  | at io.netty.channel.AbstractChannel$AbstractUnsafe.flush(AbstractChannel.java:758)
teku  | at io.netty.channel.DefaultChannelPipeline$HeadContext.flush(DefaultChannelPipeline.java:1391)
teku  | at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:815)
teku  | at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1126)
teku  | at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:148)
teku  | at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:141)
teku  | at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:535)
teku  | at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:201)
teku  | at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1195)
teku  | at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
teku  | at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
teku  | at java.base/java.lang.Thread.run(Unknown Source)
teku  | 2026-03-09 15:05:51.161 INFO  - Slot Event  *** Slot: 13853727, Block:                                                        ... empty, Justified: 432927, Finalized: 432926, Peers: 80
teku  | 2026-03-09 15:05:59.001 INFO  - Epoch Event *** Epoch: 432929, Justified checkpoint: 432928, Finalized checkpoint: 432927, Finalized root: 1b67d0aa685cefcc0166b555943c86a5698afe1619b251f9c9f3d700d0fc6034
teku  | 2026-03-09 15:05:59.002 INFO  - Sync committee performance: epoch 432928, expected 896, produced 29, correct 29, included 28 (97%)

Relevant log output

Possible Solution

No response

Version

No response

Would you like to work on fixing this bug ?

No