我部署了函数，用的 boostrap 文件，指定了端口，报下面这个错，请问是什么问题？

我部署了函数，用的 boostrap 文件，指定了端口，报下面这个错，请问是什么问题？

FC Invoke Start RequestId: 42234cb8-a672-4bf8-b265-4b986d13af52 [2022-09-06 10:49:02 +0000] [5] [INFO] Worker exiting (pid: 5)

[2022-09-06 10:49:02 +0000] [6] [INFO] Booting worker with pid: 6

[2022-09-06 10:49:02 +0000] [7] [INFO] Booting worker with pid: 7

• Serving Flask app 'server'

• Debug mode: on

• Serving Flask app 'server'

• Debug mode: on

Address already in use

Port 9000 is in use by another program. Either identify and stop that program, or start the server with a different port.

[2022-09-06 10:49:04 +0000] [6] [INFO] Worker exiting (pid: 6)

Address already in use

Port 9000 is in use by another program. Either identify and stop that program, or start the server with a different port.

[2022-09-06 10:49:04 +0000] [7] [INFO] Worker exiting (pid: 7)

[2022-09-06 10:49:04 +0000] [8] [INFO] Booting worker with pid: 8

[2022-09-06 10:49:04 +0000] [9] [INFO] Booting worker with pid: 9

• Serving Flask app 'server'

• Debug mode: on

• Serving Flask app 'server'

• Debug mode: on

Address already in use

Port 9000 is in use by another program. Either identify and stop that program, or start the server with a different port.