Memcache Java API /deserialize issue

[Manoj Kumar]

we are using java-memcached-1.1.11 server and using java-memcached-1.0  
client API.
we are successfully storing session Object into memcahed server. While 
getting session
Object from memcahe server i am getting IOException

  I have given session.getID()  as Key and session Object  as value
boolean flag = mc.set(session.getId(), session);


pelase help


*******************************************************************

com.danga.MemCached.SockIOPool Mon Nov 22 10:58:49 CST 2004 - cache socket 
pick F4FC7C3B16C7228FBE4B16DC404C99F5 null
com.danga.MemCached.MemCachedClient Mon Nov 22 10:58:49 CST 2004 - ++++ 
ClassNotFoundException thrown while trying to deserialize for key: 
F4FC7C3B16C7228FBE4B16DC404C99F5
com.danga.MemCached.MemCachedClient Mon Nov 22 10:58:49 CST 2004 - ++++ 
exception thrown while trying to get object from cache for key: 
F4FC7C3B16C7228FBE4B16DC404C99F5
com.danga.MemCached.MemCachedClient Mon Nov 22 10:58:49 CST 2004 - +++ 
failed while trying to deserialize for key: F4FC7C3B16C7228FBE4B16DC404C99F5
java.io.IOException: +++ failed while trying to deserialize for key: 
F4FC7C3B16C7228FBE4B16DC404C99F5
	at com.danga.MemCached.MemCachedClient.loadItems(MemCachedClient.java:1084)
	at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:850)
	at com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:816)
	at 
org.apache.catalina.session.JDBCMemCachedStore.load(JDBCMemCachedStore.java:591)
	at org.apache.catalina.session.StoreBase.processExpires(StoreBase.java:191)
	at 
org.apache.catalina.session.PersistentManagerBase.backgroundProcess(PersistentManagerBase.java:221)
	at 
org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1272)
	at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1553)
	at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1562)
	at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1562)
	at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1542)
	at java.lang.Thread.run(Thread.java:595)

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