Hi, we have a cache configured like this:

  | <?xml version="1.0" encoding="UTF-8"?>
  | 
  | <!-- ===================================================================== 
-->
  | <!--                                                                       
-->
  | <!--  SOM Services Provisioning Cache Service Configuration                 
                       -->
  | <!--                                                                       
-->
  | <!-- ===================================================================== 
-->
  | 
  | <server>
  | 
  |     <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar" />
  | 
  | 
  |     <!-- 
==================================================================== -->
  |     <!-- Defines TreeCache configuration                                    
  -->
  |     <!-- 
==================================================================== -->
  | 
  | 
  |     <mbean code="org.jboss.cache.TreeCache"
  |             name="jboss.cache:service=SOMServicesProvisioningCache">
  | 
  |             <depends>jboss:service=Naming</depends>
  |             <depends>jboss:service=TransactionManager</depends>
  |             <depends>
  |                     
jboss.jca:name=jdbc/somservices,service=DataSourceBinding
  |             </depends>
  | 
  |             <attribute name="TransactionManagerLookupClass">
  |                     org.jboss.cache.JBossTransactionManagerLookup
  |             </attribute>
  | 
  |             <!--
  |                     Isolation level : SERIALIZABLE
  |                     REPEATABLE_READ (default)
  |                     READ_COMMITTED
  |                     READ_UNCOMMITTED
  |                     NONE
  |             -->
  |             <attribute name="IsolationLevel">NONE</attribute>
  | 
  |             <!--
  |                     Valid modes are LOCAL
  |                     REPL_ASYNC
  |                     REPL_SYNC
  |                     INVALIDATION_ASYNC
  |                     INVALIDATION_SYNC
  |             -->
  |             <attribute name="CacheMode">REPL_SYNC</attribute>
  | 
  |             <!-- Just used for async repl: use a replication queue -->
  |             <attribute name="UseReplQueue">false</attribute>
  |             <!-- Replication interval for replication queue (in ms) -->
  |             <attribute name="ReplQueueInterval">0</attribute>
  |             <!-- Max number of elements which trigger replication -->
  |             <attribute name="ReplQueueMaxElements">0</attribute>
  | 
  |             <!-- Name of cluster. Needs to be the same for all clusters, in 
order
  |                     to find each other -->
  |             <attribute name="ClusterName">
  |                     SOMServicesProvisioning-Cluster
  |             </attribute>
  | 
  |             <!-- JGroups protocol stack properties. Can also be a URL,
  |                     e.g. file:/home/bela/default.xml
  |                     <attribute name="ClusterProperties"></attribute>
  |             -->
  | 
  |             <attribute name="ClusterConfig">
  |                     <config>
  |                             <!-- UDP: if you have a multihomed machine,
  |                                     set the bind_addr attribute to the 
appropriate NIC IP address, e.g bind_addr="192.168.0.2" -->
  |                             <!-- UDP: On Windows machines, because of the 
media sense feature
  |                                     being broken with multicast (even after 
disabling media sense)
  |                                     set the loopback attribute to true -->
  |                             <UDP
  |                                     
mcast_addr="${jboss.cache.SOMServicesProvisioningCache.addr:228.1.2.3}"
  |                                     
mcast_port="${jboss.cache.SOMServicesProvisioningCache.port:48866}"
  |                                     ip_ttl="64" ip_mcast="true" 
mcast_send_buf_size="150000"
  |                                     mcast_recv_buf_size="80000" 
ucast_send_buf_size="150000"
  |                                     ucast_recv_buf_size="80000" 
loopback="false" />
  |                             <PING timeout="2000" num_initial_members="3"
  |                                     up_thread="false" down_thread="false" />
  |                             <MERGE2 min_interval="10000" 
max_interval="20000" />
  |                             <!--        <FD shun="true" up_thread="true" 
down_thread="true" />-->
  |                             <FD_SOCK />
  |                             <VERIFY_SUSPECT timeout="1500" up_thread="false"
  |                                     down_thread="false" />
  |                             <pbcast.NAKACK gc_lag="50"
  |                                     retransmit_timeout="600,1200,2400,4800" 
max_xmit_size="8192"
  |                                     up_thread="false" down_thread="false" />
  |                             <UNICAST timeout="600,1200,2400" 
window_size="100"
  |                                     min_threshold="10" down_thread="false" 
/>
  |                             <pbcast.STABLE desired_avg_gossip="20000"
  |                                     up_thread="false" down_thread="false" />
  |                             <FRAG frag_size="8192" down_thread="false"
  |                                     up_thread="false" />
  |                             <pbcast.GMS join_timeout="5000"
  |                                     join_retry_timeout="2000" shun="true" 
print_local_addr="true" />
  |                             <pbcast.STATE_TRANSFER up_thread="true"
  |                                     down_thread="true" />
  |                     </config>
  |             </attribute>
  | 
  | 
  |             <!-- Whether or not to fetch state on joining a cluster -->
  |             <attribute name="FetchInMemoryState">true</attribute>
  | 
  |             <!-- The max amount of time (in milliseconds) we wait until the
  |                     initial state (ie. the contents of the cache) are 
retrieved from
  |                     existing members in a clustered environment -->
  |             <attribute name="InitialStateRetrievalTimeout">15000</attribute>
  | 
  |             <!-- Number of milliseconds to wait until all responses for a
  |                     synchronous call have been received. -->
  |             <attribute name="SyncReplTimeout">15000</attribute>
  | 
  |             <!-- Max number of milliseconds to wait for a lock acquisition 
-->
  |             <attribute name="LockAcquisitionTimeout">10000</attribute>
  | 
  |             <!-- Indicate whether to use region based marshalling or not. 
Set this to true if you are running under a scoped
  |                     class loader, e.g., inside an application server. 
Default is "false". -->
  |             <attribute name="UseRegionBasedMarshalling">true</attribute>
  | 
  |             <attribute name="CacheLoaderConfiguration">
  |                     <config>
  |                             <passivation>false</passivation>
  |                             <preload>/</preload>
  |                             <shared>true</shared>
  |                             <cacheloader>
  |                                     <class>
  |                                             
org.jboss.cache.loader.ClusteredCacheLoader
  |                                     </class>
  |                                     <properties>timeout=1000</properties>
  |                                     <async>true</async>
  |                                     
<fetchPersistentState>false</fetchPersistentState>
  |                                     
<ignoreModifications>false</ignoreModifications>
  | 
  |                             </cacheloader>
  |                             <!--
  |                                     som.cache.driver=${db.som.driver}
  |                                     som.cache.url=${db.som.url}
  |                                     som.cache.user=${db.som.user}
  |                                     som.cache.password=${db.som.password}
  |                             -->
  |                             <cacheloader>
  |                                     <class>
  |                                             
org.jboss.cache.loader.JDBCCacheLoader
  |                                     </class>
  |                                     <properties>
  |                                             
cache.jdbc.datasource=java:jdbc/somservices
  |                                             
cache.jdbc.table.name=services_provisioning
  |                                             cache.jdbc.table.create=true
  |                                             cache.jdbc.table.drop=false
  |                                             
cache.jdbc.table.primarykey=jbosscache_pk
  |                                             cache.jdbc.fqn.column=fqn
  |                                             cache.jdbc.fqn.type=varchar(255)
  |                                             cache.jdbc.node.column=node
  |                                             cache.jdbc.node.type=blob
  |                                             cache.jdbc.parent.column=parent
  |                                     </properties>
  |                                     <async>false</async>
  |                                     
<fetchPersistentState>true</fetchPersistentState>
  |                                     
<ignoreModifications>false</ignoreModifications>
  |                             </cacheloader>
  |                     </config>
  |             </attribute>
  | 
  | 
  |     </mbean>
  | 
  | 
  |     <!--  Uncomment to get a graphical view of the TreeCache MBean above -->
  |     <!--   <mbean code="org.jboss.cache.TreeCacheView" 
name="jboss.cache:service=TreeCacheView">-->
  |     <!--      <depends>jboss.cache:service=TreeCache</depends>-->
  |     <!--      <attribute 
name="CacheService">jboss.cache:service=TreeCache</attribute>-->
  |     <!--   </mbean>-->
  | 
  | 
  | </server>
  | 

We are experiencing this behaviour (in a two node cluster (ClusterA-ClusterB):
We put a value on ClusterA.
  | Value is stored on cache and DB
  | Modify an attribute of the node in clusterA
  | Value is changed in clusterB
  | It seems value is not changed in DB
  | After some time, initial value (the value in DB) is retrieved in clusterB
  | 
  | How can this be possible??? How can I avoid this?
  | Reading 
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=124722&start=10&postdays=postDays&postorder=postOrder&highlight=highlight
 it seems like ClusteredCacheLoader is not for what it seems to be. Do I need a 
ChainingCacheLoader??? Do I need a ClusteredCacheLoader if I dont have 
Evictions??? Would it load a value first from the other node of the cluster, 
and if not found from DB? Why is not storing correct value in DB?
  | 
  | I`m getting really mad, because this is already in production and we`re 
wasting to much time with unexpected behaviour that I can`t expect from reading 
documentation. Although I'm also reading JBC2x docs.
  | 
  | Thanks,

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