Configure the connection pool of the LDAP provider:
ldap.connect.pool = apache-commons
ldap.connect.pool.maxActive = 20
ldap.connect.pool.maxIdle = 20
ldap.connect.timeout = 60000
ldap.read.timeout = 60000
ldap.connect.pool.testOnBorrow = true
ldap.connect.pool.testWhileIdle = true
ldap.connect.pool.timeBetweenEvictionRunsMillis = 900000