5 Replies Latest reply on Jul 10, 2006 2:26 AM by jaikiran pai

    Eviction not working in JBossCache-1.2.4SP2

    jaikiran pai Master

      I am trying out a simple standalone app where i, put in 50 elements in the cache at a given fqn. I have enabled EvictionPolicy and set the maxNodes as 5. However none of the nodes are getting evicted. Here's the code and the config file:

      package org.myapp;
      import org.jboss.cache.Fqn;
      import org.jboss.cache.PropertyConfigurator;
      import org.jboss.cache.TreeCache;
      import org.w3c.dom.Element;
      public class TestEviction {
       public static void main(String arg[])
       try {
       TreeCache treeCache = new TreeCache();
       PropertyConfigurator config = new PropertyConfigurator(); // configure tree cache. Needs to be in the classpath
       config.configure(treeCache, "D:\\local-eviction-service.xml");
       System.out.println("Eviction policy class name: " +treeCache.getEvictionPolicyClass());
       System.out.println("Revisit time: " + treeCache.getEvictionThreadWakeupIntervalSeconds());
       Fqn fqn = new Fqn("a/b/c");
       for(int i=0;i<50;i++)
       System.out.println("Put#"+ (i+1));
       treeCache.put(fqn, new Integer(i), "Put#" + i);
       System.out.println("Exists fqn: " + treeCache.exists(fqn));
       System.out.println("Exists object: " + treeCache.exists(fqn,new Integer(i)));
       * Check the contents of FQN
       System.out.println("Contents of FQN: " + treeCache._print(fqn));
       * Just verify whether eviction policy config was picked up
       Element ele = treeCache.getEvictionPolicyConfig();
       System.out.println("Before EXPLICITLY Calling evict of FQN, Obj 1: " + treeCache.get(fqn,new Integer("1")));
       System.out.println("Before EXPLICITLY Calling evict of FQN, Obj 48: " + treeCache.get(fqn,new Integer("48")));
       * manually evict
       System.out.println("After EXPLICITLY Calling evict of FQN, Obj 1: " + treeCache.get(fqn,new Integer("1")));
       System.out.println("After EXPLICITLY Calling evict of FQN, Obj 48: " + treeCache.get(fqn,new Integer("48")));
       } catch (Exception e) {
       // TODO Auto-generated catch block

      Config file:

      <?xml version="1.0" encoding="UTF-8"?>
      <!-- ===================================================================== -->
      <!-- -->
      <!-- Sample TreeCache Service Configuration -->
      <!-- -->
      <!-- ===================================================================== -->
       <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar"/>
       <!-- ==================================================================== -->
       <!-- Defines TreeCache configuration -->
       <!-- ==================================================================== -->
       <mbean code="org.jboss.cache.TreeCache"
       Configure the TransactionManager
      <!-- <attribute name="TransactionManagerLookupClass">org.jboss.cache.JBossTransactionManagerLookup</attribute> -->
       Node locking level : SERIALIZABLE
       REPEATABLE_READ (default)
       <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
       Valid modes are LOCAL
       <attribute name="CacheMode">LOCAL</attribute>
       <!-- Name of cluster. Needs to be the same for all clusters, in order
       to find each other
       <attribute name="ClusterName">TreeCache-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">
       <!-- 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="" mcast_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"
       <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" 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"
       <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"/>
       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">20000</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">
       <attribute name="wakeUpIntervalSeconds">2</attribute>
       <!-- Cache wide default -->
       <region name="/_default_">
       <attribute name="maxNodes">5</attribute>
       <attribute name="timeToLiveSeconds">0</attribute>
       <region name="/a/b/c">
       <attribute name="maxNodes">5</attribute>
       <attribute name="timeToLiveSeconds">0</attribute>

      Any idea why this is not working?