Bug Report

I found the error: IllegalStateException: null throw by CommandOutput class in our service after the network of client host is disconnected and recovered;

I restart this client and it runs well

what confused me is that this exception is throw by CommandOutput class not by its subclass

there is the error stack：(get command)
Caused by: java.lang.IllegalStateException: null
at io.lettuce.core.output.CommandOutput.set(CommandOutput.java:85)
at io.lettuce.core.protocol.RedisStateMachine.safeSet(RedisStateMachine.java:358)
at io.lettuce.core.protocol.RedisStateMachine.decode(RedisStateMachine.java:139)
at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:716)
at io.lettuce.core.protocol.CommandHandler.decode0(CommandHandler.java:680)
at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:675)
at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:596)
at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:565)

my service would create 2 lettuce instance(cluster mode) and select the least used one to handle request

Environment

• Lettuce version(s): 5.3.0.RELEASE
• Redis version: 4.0.11
• Netty version: 4.1.47.Final