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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.
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