Python Dash应用程序部署到Heroku:gunicorn.errors.HaltServer:<；HaltServer'；工作程序无法启动。'；3>；

我正在向Heroku部署Dash应用程序。该应用程序在本地主机上运行，但是，当尝试部署到Heroku时，我运行

gunicorn.errors.HaltServer:

我的文件结构如下所示：

app.py
index.py
Procfile
requirements.txt
-- Tabs
--- Tab1.py
--- Tab2.py 

程序文件内容：

web: gunicorn index:server --workers 4

错误回溯：

Traceback (most recent call last):
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 225, in run
       handler()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 260, in handle_term
       raise StopIteration
   StopIteration
   During handling of the above exception, another exception occurred:
   Traceback (most recent call last):
     File "/app/.heroku/python/bin/gunicorn", line 11, in <module>
       sys.exit(run())
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 61, in run
       WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 223, in run
       super(Application, self).run()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 72, in run
       Arbiter(self).run()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 228, in run
       self.halt()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 345, in halt
       self.stop()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 393, in stop
       time.sleep(0.1)
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 245, in handle_chld
       self.reap_workers()
     File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 525, in reap_workers
       raise HaltServer(reason, self.WORKER_BOOT_ERROR)
   gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

---

Procfile指出gunicorn应该在

index.py

文件中将Flask服务器作为名为

server

的变量查找（这基本上就是

gunicorn index:server

的意思）。但是，似乎您尚未定义该变量，即您应该添加一行，如

server = app.server

---

在您的

index.py

文件中（或更改您的Procfile）。

您能显示index.py的内容吗？当然。已使用index.py的内容更新@emherIt内容似乎不完整，即没有导入语句？有，对不起。我把它们加进去了。

server = app.server