Hi,
We have a system, where we test it with Oracle9i and Mysql5, with these 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" 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>true</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>

When we set a new node, it gets stored in database, but when we update one of the attributes of an already created node, it doesn`t get updated in database, even though there is no log indicating any problem, and JBC logs shows an update statement.

This seems to work right with MySql5, but not with Oracle9i.
Has anybody experienced an issue like this.