Hi all,
I'm running a test program with a simple loop that writes an object to the cache and then removes it.
As I monitor with JConsole, the heap usage grows and grows and can't be reclaimed with a garbage collection. Eventually it crashes with an OutOfMemoryError.

Below is my code.
MemoryLeakTest.java:

package test;

import static java.lang.System.out;

import org.jboss.cache.PropertyConfigurator;
import org.jboss.cache.aop.PojoCache;

public class MemoryLeakTest {

 static PojoCache cache;

 public static void cacheInit() throws Exception {
 cache = new PojoCache();
 PropertyConfigurator config = new PropertyConfigurator();
 config.configure(cache, "replSync-service.xml");
 cache.start();
 }


 public static void main(String[] args) throws Exception {
 cacheInit();

 final int MAX = 1000000;
 final int INNER_MAX = 2;
 final int DEPTH = 0;

 out.println("Adding to cache...");
 for (Integer i=0; i<MAX; i++) {
 String fqn = "/" + i;
 if (i % 100 == 0) out.println(" putting at: " + fqn);

 for (int j=0; j<INNER_MAX; j++) {
 cache.putObject(fqn+"/"+j, new DummyObject(DEPTH));
 }

 for (int j=0; j<INNER_MAX; j++) {
 cache.removeObject(fqn+"/"+j);
 cache.remove(fqn+"/"+j);
 }

 }

 cacheStop();
 }

 public static void cacheStop() {
 cache.stop();
 cache.destroy();
 }
}

package test;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class DummyObject {
 static Random random = new Random();

 byte[] data;
 List<DummyObject> children = new ArrayList<DummyObject>();


 public DummyObject(int depth) {
 this.data = new byte[100];

 if (depth > 0) {
 int nextDepth = depth - 1;
 children.add(new DummyObject(nextDepth));
 children.add(new DummyObject(nextDepth));
 }
 }

 private String generateRandomData() {
 StringBuilder sb = new StringBuilder();
 for (int i=0; i<1000; i++)
 sb.append(random.nextLong());

 return sb.toString();
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<server>
 <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar"/>
 <mbean code="org.jboss.cache.TreeCache" name="jboss.cache:service=TreeCache">

 <depends>jboss:service=Naming</depends>
 <depends>jboss:service=TransactionManager</depends>

 <attribute name="TransactionManagerLookupClass">org.jboss.cache.DummyTransactionManagerLookup</attribute>
 <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
 <attribute name="CacheMode">REPL_SYNC</attribute>
 <attribute name="UseReplQueue">false</attribute>
 <attribute name="ReplQueueInterval">0</attribute>
 <attribute name="ReplQueueMaxElements">0</attribute>
 <attribute name="ClusterName">TreeCache-Cluster</attribute>

 <attribute name="ClusterConfig">
 <config>
 <UDP mcast_addr="228.1.2.3" mcast_port="58866"
 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_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>

 <attribute name="FetchInMemoryState">true</attribute>
 <attribute name="InitialStateRetrievalTimeout">15000</attribute>
 <attribute name="SyncReplTimeout">15000</attribute>
 <attribute name="LockAcquisitionTimeout">10000</attribute>
 <attribute name="EvictionPolicyClass"></attribute>
 <attribute name="UseRegionBasedMarshalling">true</attribute>
 </mbean>

</server>

<?xml version="1.0" encoding="UTF-8"?>
<aop>
 <prepare expr="field(* test.DummyObject->*)" />
</aop>

-Dcom.sun.management.jmxremote -javaagent:.\lib\jboss-aop-jdk50.jar -Djboss.aop.path=.\resources\pojocache-aop.xml -Djboss.aop.path=.\resources\jboss-aop.xml -Xms128M -Xmx128M