remote diskcache, out of memory and lost objects using remoting

I try to put and get objects from a remote cache, that is running on Tomcat. I use index_disk_cache on the server. The communication between client and server works. In case of large objects or a large number of objects I get a java.lang.OutOfMemoryError

Exception in thread "CacheEventQueue.QProcessor-myRegion1" java.lang.OutOfMemoryError: Java heap space
at sun.reflect.ByteVectorImpl.trim(ByteVectorImpl.java:52)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:370)
at sun.reflect.MethodAccessorGenerator.generateSerializationConstructor(MethodAccessorGenerator.java:95)
at sun.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:313)
at java.io.ObjectStreamClass.getSerializableConstructor(ObjectStreamClass.java:1327)
at java.io.ObjectStreamClass.access$1500(ObjectStreamClass.java:52)
at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:437)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:413)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:310)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1106)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at sun.rmi.server.UnicastRef.marshalValue(UnicastRef.java:274)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
at org.apache.jcs.auxiliary.remote.server.RemoteCacheServer_Stub.update(Unknown Source)
at org.apache.jcs.auxiliary.remote.RemoteCache.update(RemoteCache.java:210)
at org.apache.jcs.engine.CacheAdaptor.handlePut(CacheAdaptor.java:91)
at org.apache.jcs.engine.CacheEventQueue$PutEvent.doRun(CacheEventQueue.java:688)
at org.apache.jcs.engine.CacheEventQueue$AbstractCacheEvent.run(CacheEventQueue.java:607)
at org.apache.jcs.engine.CacheEventQueue$QProcessor.run(CacheEventQueue.java:575)

My configurations are:

1) client:

jcs.auxiliary.RFailover=org.apache.jcs.auxiliary.remote.RemoteCacheFactory
jcs.auxiliary.RFailover.attributes=org.apache.jcs.auxiliary.remote.RemoteCacheAttributes
jcs.auxiliary.RFailover.attributes.FailoverServers=pchl:1102
jcs.auxiliary.RC.attributes.RemoveUponRemotePut=true
jcs.auxiliary.RFailover.attributes.GetOnly=false
jcs.auxiliary.RFailover.attributes.MaxObjects=100
jcs.region.myRegion1=RFailover

#jcs.region.myRegion1=RFailover
#jcs.region.myRegion1.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
#jcs.region.myRegion1.cacheattributes.MaxObjects=100
#jcs.region.myRegion1.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache

Server:

1. Remote RMI Cache set up to failover
   jcs.auxiliary.RFailover=org.apache.jcs.auxiliary.remote.RemoteCacheFactory
   jcs.auxiliary.RFailover.attributes=org.apache.jcs.auxiliary.remote.RemoteCacheAttributes
   jcs.auxiliary.RC.attributes.RemoveUponRemotePut=true
   jcs.auxiliary.RFailover.attributes.GetOnly=false

1. this didn't help, the memory error occurs with and without
   #jcs.region.testCache1=DC,RFailover
   #jcs.region.testCache1.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
   #jcs.region.testCache1.cacheattributes.MaxObjects=1000
   #jcs.region.testCache1.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache

1. Registry used to register and provide the
2. IRemoteCacheService service.
   registry.host=localhost
   registry.port=1102
3. call back port to local caches.
   remote.cache.service.port=1102
4. cluster setting
   remote.cluster.LocalClusterConsistency=true
   remote.cluster.AllowClusterGet=true

##############################################################

1. 1. 1. 1. 1. Default Region Configuration
               jcs.default=DC
               jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
               jcs.default.cacheattributes.MaxObjects=100
               jcs.default.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache
               jcs.default.cacheattributes.UseMemoryShrinker=false
               jcs.default.cacheattributes.ShrinkerIntervalSeconds=60

##############################################################

1. 1. 1. 1. 1. CACHE REGIONS
               jcs.region.myRegion1=DC
               jcs.region.myRegion1.cacheattributes=org.apache.jcs.engine.CompositeCacheAttributes
               jcs.region.myRegion1.cacheattributes.MaxObjects=-1
               jcs.region.myRegion1.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory.lru.LRUMemoryCache
               #jcs.region.myRegion1.cacheattributes.DiskUsagePattern=SWAP
               ##############################################################
            2. AUXILIARY CACHES
2. Indexed Disk Cache
   jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheFactory
   jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheAttributes
   ###jcs.auxiliary.DC.attributes.DiskPath=O:
   liantis/JCS/dump
   jcs.auxiliary.DC.attributes.DiskPath=dump
   jcs.auxiliary.DC.attributes.MaxPurgatorySize=100
   jcs.auxiliary.DC.attributes.MaxKeySize=-1
   jcs.auxiliary.DC.attributes.OptimizeAtRemoveCount=300000
   jcs.auxiliary.DC.attributes.OptimizeOnShutdown=true
   jcs.auxiliary.DC.attributes.MaxRecycleBinSize=7500
   jcs.auxiliary.DC.attributes.EventQueueType=POOLED
   jcs.auxiliary.DC.attributes.EventQueuePoolName=disk_cache_event_queue

1. Disk Cache pool
   thread_pool.disk_cache_event_queue.boundarySize=50
   thread_pool.disk_cache_event_queue.useBoundary=true
   thread_pool.disk_cache_event_queue.maximumPoolSize=15
   thread_pool.disk_cache_event_queue.minimumPoolSize=1
   thread_pool.disk_cache_event_queue.keepAliveTime=3500
   thread_pool.disk_cache_event_queue.startUpSize=1

pchl is the server on that Tomcat is running.

In case of smal objects I have the problem, that I will lose objects again. I've configured the queue and the threadpool at the server, but it seams, that there is something too, that I've forgotten...

I'll work with a absolute minimum on java heapsize, that is the reson to use a cache in our case.

The problems will occur with and without the outcommented lines in the clientconfiguration

The reason for the questions during the last days are , that we evaluate caching architectures and performance using jcs ...