Incomplete memcache protocol implementation - Unknown operation: touch

execute a touch operation agains an Infinispan Server memcache socket-binding. Expected Behaviour The object's expiration time should be reset (or similar) Actual Behaviour 2019-06-06 10:45:31,082 ERROR [org.infinispan.server.memcached.MemcachedDecoder] (Memcached-ServerIO-3-2) ISPN005003: Exception reported: org.infinispan.server.memcached.UnknownOperationException: Unknown operation: touch at org.infinispan.server.memcached.MemcachedDecoder.toRequest(MemcachedDecoder.java:1068) at org.infinispan.server.memcached.MemcachedDecoder.readHeader(MemcachedDecoder.java:322) at org.infinispan.server.memcached.MemcachedDecoder.decodeHeader(MemcachedDecoder.java:202) at org.infinispan.server.memcached.MemcachedDecoder.decodeDispatch(MemcachedDecoder.java:180) at org.infinispan.server.memcached.MemcachedDecoder.decode(MemcachedDecoder.java:133) at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489) at io.netty.handler.codec.ReplayingDecoder.callDecode(ReplayingDecoder.java:366) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) at org.infinispan.server.core.transport.StatsChannelHandler.channelRead(StatsChannelHandler.java:26) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:646) at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:581) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:498) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:460) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748)