OpenClinica connection pool problem

Dear All,
We had some connection pool problem for about 30 mins on PRODUCTION server. The users could not login or save the data. I looked at our logs. It indicated some DBCP connection problem. Does anyone have the similar problem? What was the reason to cause this DBCP connection problem? We had less than 10 users at that time. Where is the OpenClinica connection pool configuration?
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
at org.apache.commons.dbcp.PoolingDataSource.getConnection(
at org.apache.commons.dbcp.BasicDataSource.getConnection(
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(
at org.hibernate.jdbc.ConnectionManager.openConnection(
... 92 more
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(
at org.apache.commons.dbcp.AbandonedObjectPool.borrowObject(
at org.apache.commons.dbcp.PoolingDataSource.getConnection(
... 95 more
Best Regards
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