The boat calls at the main port to load its regular cargo of bananas.
船停泊在那个大港，装载其常规货物香蕉。
《柯林斯英汉双解大词典》
2
But on an outing earlier this month Mr Rolston appeared flummoxed by news that the queue of ships waiting to enter the port and load coal had stretched that morning to a record 70 vessels.
The MessageListener thread pool should be larger than any of the listener port Maximum Session values; how much larger depends on how you want the system to behave under load.