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From "Manfred Quasten (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCS-52) remote diskcache, out of memory and lost objects using remoting
Date Fri, 12 Sep 2008 12:31:44 GMT
remote diskcache, out of memory and lost objects using remoting 
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                 Key: JCS-52
                 URL: https://issues.apache.org/jira/browse/JCS-52
             Project: JCS
          Issue Type: Question
          Components: RMI Remote Cache
    Affects Versions: jcs-1.3
         Environment: java6, xp, tomcat6 
            Reporter: Manfred Quasten
            Assignee: Aaron Smuts
            Priority: Blocker
             Fix For: jcs-1.3


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:

# 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

# 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

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





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

##############################################################
##### 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
##############################################################
##### AUXILIARY CACHES
# 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


# 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 ...

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