Provide a silent way to check for Cache existance from an Hot Rod client ------------------------------------------------------------------------ Key: ISPN-8347 URL: https://issues.jboss.org/browse/ISPN-8347 Project: Infinispan Issue Type: Enhancement Components: Remote Protocols Affects Versions: 9.1.1.Final Reporter: Sanne Grinovero Assignee: Tristan Tarrant Currently an Hot Rod client can create a new cache by using {code:java} hotrodClient.administration().createCache( cacheName, null ); {code} But we shouldn't invoke this if the {{Cache}} might already exist. When we don't know if the cache might exist already, we check in advance with {code:java} RemoteCache<?,?> cache = hotrodClient.getCache( cacheName ); if ( cache == null ) { ... {code} This works fine from a client side perspective, but it triggers to log a full stacktrace mentioning a not so reassuring {{ERROR}} : {noformat} 20:22:35,437 WARN Codec21:361 - ISPN004005: Error received from the server: org.infinispan.server.hotrod.CacheNotFoundException: Cache with name 'ENTITY_CACHE' not found amongst the configured caches 2017-09-26 20:22:36,021 ERROR [org.infinispan.server.hotrod.CacheDecodeContext] (HotRod-ServerWorker-3-7) ISPN005003: Exception reported: org.infinispan.server.hotrod.CacheNotFoundException: Cache with name 'ANOTHER_ENTITY_CACHE' not found amongst the configured caches at org.infinispan.server.hotrod.CacheDecodeContext.obtainCache(CacheDecodeContext.java:121) at org.infinispan.server.hotrod.HotRodDecoder.decodeHeader(HotRodDecoder.java:160) at org.infinispan.server.hotrod.HotRodDecoder.decode(HotRodDecoder.java:92) at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) 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$HeadContext.channelRead(DefaultChannelPipeline.java:1334) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:1017) at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:394) at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:299) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144) at java.lang.Thread.run(Thread.java:748) {noformat} I'm not sure if we could easily avoid to log such an error as this check is "normal business" for our code. Alternatively I'd welcome a new client operation to query defined/started caches.