[infinispan-issues] [JBoss JIRA] (ISPN-3190) Memcached server throwing NullPointerException if the mashaller is not explicitly set

[Martin Gencur (JIRA)]

Martin Gencur created ISPN-3190:
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             Summary: 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+Embedded+and+Remote+Server+Endpoints 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}

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