[jboss-user] [JBoss Cache: Core Edition] - very strange behaviour of jboss cache 1.4.1

[bobbiee]

Hello.

  I am experiencing really strange problem here. When I start jboss, some entites are pre-loaded into cache. Then, if I load more and more entities in there, suddenly cache become empty and start all over - this causes dbs traffic of course.

On my local pc, if there are some nodes in the cache (sometimes 275, sometimes 900 it depends which operation I run), then cache gets suddenly clean, and when operation finish, the number of nodes in cache is 10 - and its only directories.

On production server this process repeats and repeats.

Could somebody help me to keep the nodes inside the cache bit longer??

Here is my configuration

<?xml version="1.0" encoding="UTF-8"?>
  | <server>
  | 
  |   <!--  ====================================================================  -->
  |   <!--  Defines TreeCache configuration                                       -->
  |   <!--  ====================================================================  -->
  |   <mbean code="org.jboss.cache.TreeCache" name="jboss.cache:service=EJB3EntityTreeCache">
  |     <depends>jboss:service=Naming</depends>
  |     <depends>jboss:service=TransactionManager</depends>
  | 
  |     <!-- Configure the TransactionManager -->
  |     <attribute name="TransactionManagerLookupClass">org.jboss.cache.JBossTransactionManagerLookup</attribute>
  | 
  |     <!--
  |             Node locking level : SERIALIZABLE
  |                                  REPEATABLE_READ (default)
  |                                  READ_COMMITTED
  |                                  READ_UNCOMMITTED
  |                                  NONE
  |     -->
  |     <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
  | 
  |     <!--     Valid modes are LOCAL
  |                              REPL_ASYNC
  |                              REPL_SYNC
  |     -->
  |     <attribute name="CacheMode">REPL_SYNC</attribute>
  | 
  |     <!-- Name of cluster. Needs to be the same for all clusters, in order
  |              to find each other -->
  |     <attribute name="ClusterName">EJB3-entity-cache</attribute>
  | 
  |     <attribute name="ClusterConfig">
  |       <config>
  |         <!-- UDP: if you have a multihomed machine,
  |                 set the bind_addr attribute to the appropriate NIC IP address
  |         -->
  |         <!-- 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.partition.udpGroup:228.1.2.3}" mcast_port="43333" ip_ttl="2" 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" />
  |         <VERIFY_SUSPECT timeout="1500" up_thread="false" down_thread="false" />
  |         <pbcast.NAKACK gc_lag="50" max_xmit_size="8192" retransmit_timeout="600,1200,2400,4800" 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="false" down_thread="false" />
  |       </config>
  |     </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">5000</attribute>
  | 
  |     <!--    Number of milliseconds to wait until all responses for a
  |             synchronous call have been received.
  |     -->
  |     <attribute name="SyncReplTimeout">10000</attribute>
  | 
  |     <!--  Max number of milliseconds to wait for a lock acquisition -->
  |     <attribute name="LockAcquisitionTimeout">15000</attribute>
  | 
  |     <!--  Name of the eviction policy class. -->
  |     <attribute name="EvictionPolicyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
  | 
  |     <!--  Specific eviction policy configurations. This is LRU -->
  |     <attribute name="EvictionPolicyConfig">
  |       <config>
  |         <attribute name="wakeUpIntervalSeconds">5</attribute>
  |         <!--  Cache wide default -->
  |         <region name="/_default_">
  |          <attribute name="maxNodes">5000</attribute>
  |          <attribute name="timeToLiveSeconds">1000</attribute>
  |        </region>
  | <region name="/aRegion">
  | <attribute name="maxNodes">15000</attribute>
  | <attribute name="timeToLiveSeconds">1000</attribute>
  | </region>
  |       </config>
  |     </attribute>
  | 
  |   </mbean>
  | 
  | </server>
  | 

Many thanks for your help.

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