java.lang.UnsupportedOperationException: io.lettuce.core.output.ValueOutput does not support set(long)

[wangchengming666]

error message as blow

Caused by: java.lang.UnsupportedOperationException: io.lettuce.core.output.StatusOutput does not support set(long)
	at io.lettuce.core.output.CommandOutput.set(CommandOutput.java:107)
	at io.lettuce.core.protocol.RedisStateMachine.safeSet(RedisStateMachine.java:774)
	at io.lettuce.core.protocol.RedisStateMachine.handleInteger(RedisStateMachine.java:409)
	at io.lettuce.core.protocol.RedisStateMachine$State$Type.handle(RedisStateMachine.java:205)
	at io.lettuce.core.protocol.RedisStateMachine.doDecode(RedisStateMachine.java:339)
	at io.lettuce.core.protocol.RedisStateMachine.decode(RedisStateMachine.java:300)
	at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:840)
	at io.lettuce.core.protocol.CommandHandler.decode0(CommandHandler.java:791)
	at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:765)
	at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:657)
	at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:597)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	... 1 common frames omitted

when search this problem in issue lists, there have been similar issues in the past.

• use with gateway，but something throw io.lettuce.core.output.ValueOutput does not support set(long) #2864
• ValueOutput does not support set(long) #2175

[tishun]

Thanks @wangchengming666 for the report!

Now having just one exception would be hard to diagnose the underlying problem. There could be many reasons why this happens. Do you have some way to reproduce it? What were the commands that were sent and were there other issues before that (OOM, connectivity, etc.)? Does it repeat or it only happens once? Does the driver stop working until restart?