Memcached server throwing NullPointerException if the mashaller is not explicitly set ------------------------------------------------------------------------------------- Key: ISPN-3190 URL: https://issues.jboss.org/browse/ISPN-3190 Project: Infinispan Issue Type: Bug Components: Server Affects Versions: 5.3.0.CR1 Reporter: Martin Gencur Assignee: Galder Zamarreño Fix For: 5.3.0.Final According to the tutorial at https://docs.jboss.org/author/display/ISPN/Interoperability+between+Embed... it is not necessary to specify a special marshaller under normal circumstances. However, the Memcached server seems to require it in any case and the Memcached client's "get" operation fails because we did not set any marshaller for the compatibility mode and it remained null. Note that I'm not using SpyMemcached. My understanding is that even if I use SpyMemcached to retrieve the entry, it will be found and retrieved but without the marshaller I simply won't understand the returned value. But something will be returned. Is my assumption correct? {code} 2013-06-05 14:12:19,054 TRACE (MemcachedServerWorker-6) [org.infinispan.container.EntryFactoryImpl] Retrieved from container ImmortalCacheEntry{key=4, value=MetadataImmortalCacheValue {value=v1, metadata=EmbeddedMetadata{lifespan=-1, maxIdle=-1, version=ServerEntryVersion(1)}}} 2013-06-05 14:12:19,054 TRACE (MemcachedServerWorker-6) [org.infinispan.interceptors.CallInterceptor] Executing command: GetKeyValueCommand {key=4, flags=[OPERATION_MEMCACHED]}. 2013-06-05 14:12:19,054 TRACE (MemcachedServerWorker-6) [org.infinispan.commands.read.GetKeyValueCommand] Found entry ImmortalCacheEntry{key=4, value=MetadataImmortalCacheValue {value=v1, metadata=EmbeddedMetadata{lifespan=-1, maxIdle=-1, version=ServerEntryVersion(1)}}} 2013-06-05 14:12:19,055 ERROR (MemcachedServerWorker-6) [org.infinispan.interceptors.InvocationContextInterceptor] ISPN000136: Execution error java.lang.NullPointerException at org.infinispan.server.memcached.MemcachedTypeConverter.marshall(MemcachedTypeConverter.scala:58) at org.infinispan.server.memcached.MemcachedTypeConverter.unboxValue(MemcachedTypeConverter.scala:45) at org.infinispan.server.memcached.MemcachedTypeConverter.unboxValue(MemcachedTypeConverter.scala:37) at org.infinispan.interceptors.compat.TypeConverterInterceptor.visitGetKeyValueCommand(TypeConverterInterceptor.java:93) at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:62) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120) at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:128) at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:92) at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:96) at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:62) at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:343) at org.infinispan.CacheImpl.getCacheEntry(CacheImpl.java:399) at org.infinispan.DecoratedCache.getCacheEntry(DecoratedCache.java:514) at org.infinispan.server.memcached.MemcachedDecoder.get(MemcachedDecoder.scala:122) at org.infinispan.server.core.AbstractProtocolDecoder.decodeKey(AbstractProtocolDecoder.scala:121) at org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:75) at org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:49) at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:500) at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435) at org.infinispan.server.core.AbstractProtocolDecoder.messageReceived(AbstractProtocolDecoder.scala:385) at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255) at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88) at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:107) at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312) at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:88) at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178) at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) {code}