Apologies for incomplete report here, but while migrating to Netty 4.2.x release line, we run into an issue with [1] and (now default) AdaptivePoolingAllocator: 1> Suppressed: ...
[16:27:18 WARN]: [ViaVersion] ERROR IN Protocol1_21To1_20_5 IN REMAP OF CONTAINER_SET_SLOT (0x15) [16:27:18 WARN]: io.netty.handler.codec.EncoderException: ...