Error with persistence

Hi, I am using persistent point-to-point messaging with 7 senders distributed across 3 connections and 9 receivers distributed across 3 connections, and I keep getting the following message:
15:56:44.703 ERROR [Scheduler-Worker-5] - Failed to destroy persistent handle
org.exolab.jms.persistence.PersistenceException: 
org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool exhausted
	at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:103)
	at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540)
	at org.exolab.jms.persistence.DBCPConnectionManager.getConnection(DBCPConnectionManager.java:121)
	at org.exolab.jms.persistence.RDBMSAdapter.getConnection(RDBMSAdapter.java:696)
	at org.exolab.jms.persistence.DatabaseService.getConnection(DatabaseService.java:173)
	at org.exolab.jms.messagemgr.AbstractConsumerMessageHandle.destroy(AbstractConsumerMessageHandle.java:326)
	at org.exolab.jms.server.SentMessageCache.postSend(SentMessageCache.java:122)
	at org.exolab.jms.server.SessionConsumer.send(SessionConsumer.java:576)
	at org.exolab.jms.server.SessionConsumer.dispatch(SessionConsumer.java:498)
	at org.exolab.jms.server.SessionConsumer.access$000(SessionConsumer.java:78)
	at org.exolab.jms.server.SessionConsumer$1.run(SessionConsumer.java:155)
	at org.exolab.jms.scheduler.SerialTask.run(SerialTask.java:164)
	at org.exolab.jms.common.threads.ThreadPool$NotifyingRunnable.run(ThreadPool.java:211)
	at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:595)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
	at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:756)
	at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:95)
	... 14 more


Any ideas? Is the pool size configurable?

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