Petals ESB Container

The Map 'exchangeTimeouts' is always growing.into the object org.ow2.petals.jbi.messaging.routing.module.PriorityOrdererModule. There is a issue into this code part: boolean found = false; synchronized (this.exchangePriority3) { found = this.exchangePriority3.remove(exchangeDecorator); } if (!found) { synchronized (this.exchangePriority2) { found = this.exchangePriority2.remove(exchangeDecorator); } } if (!found) { synchronized (this.exchangePriority1) { found = this.exchangePriority1.remove(exchangeDecorator); } } if (!found) { synchronized (this.exchangePriority0) { found = this.exchangePriority0.remove(exchangeDecorator); this.exchangeTimeouts.remove(exchangeDecorator); } }