Heroku Django 应用程序错误:工作线程超时问题 (H12)



经过一段时间的战斗,我的第一个python(django)应用程序部署成功,数据库被推送并可以访问(这意味着我可以使用heroku pg:psql访问和玩它),我可以在本地作为python manage.py runserver或在heroku中运行该应用程序。但是,最终结果仍然是"应用程序错误"页面。

heroku 日志显示以下内容:

2018-01-16T18:43:18.905263+00:00 heroku[web.1]: Restarting
2018-01-16T18:43:18.906518+00:00 heroku[web.1]: State changed from up to     starting
2018-01-16T18:43:19.978422+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2018-01-16T18:43:19.998918+00:00 app[web.1]: [2018-01-16 18:43:19 +0000] [4] [INFO] Handling signal: term
2018-01-16T18:43:26.659760+00:00 heroku[web.1]: Starting process with command `gunicorn extend_sp_radii.wsgi --timeout 20 --keep-alive 5 --log-level debug --log-file -`
2018-01-16T18:43:29.067589+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [DEBUG] Current configuration:
2018-01-16T18:43:29.067608+00:00 app[web.1]:   config: None
2018-01-16T18:43:29.067609+00:00 app[web.1]:   bind: ['0.0.0.0:48177']
2018-01-16T18:43:29.067616+00:00 app[web.1]:   max_requests_jitter: 0
2018-01-16T18:43:29.067617+00:00 app[web.1]:   timeout: 20
2018-01-16T18:43:29.067618+00:00 app[web.1]:   graceful_timeout: 30
2018-01-16T18:43:29.067619+00:00 app[web.1]:   keepalive: 5
2018-01-16T18:43:29.067620+00:00 app[web.1]:   limit_request_line: 4094
2018-01-16T18:43:29.067621+00:00 app[web.1]:   limit_request_fields: 100
2018-01-16T18:43:29.067624+00:00 app[web.1]:   reload: False
2018-01-16T18:43:29.067623+00:00 app[web.1]:   limit_request_field_size: 8190
2018-01-16T18:43:29.067625+00:00 app[web.1]:   reload_engine: auto
2018-01-16T18:43:29.067626+00:00 app[web.1]:   spew: False
2018-01-16T18:43:29.067627+00:00 app[web.1]:   check_config: False
2018-01-16T18:43:29.067628+00:00 app[web.1]:   preload_app: False
2018-01-16T18:43:29.067629+00:00 app[web.1]:   sendfile: None
2018-01-16T18:43:29.067630+00:00 app[web.1]:   chdir: /app
2018-01-16T18:43:29.067631+00:00 app[web.1]:   daemon: False
2018-01-16T18:43:29.067633+00:00 app[web.1]:   pidfile: None
2018-01-16T18:43:29.067632+00:00 app[web.1]:   raw_env: []
2018-01-16T18:43:29.067634+00:00 app[web.1]:   worker_tmp_dir: None
2018-01-16T18:43:29.067635+00:00 app[web.1]:   user: 55457
2018-01-16T18:43:29.067636+00:00 app[web.1]:   group: 55457
2018-01-16T18:43:29.067637+00:00 app[web.1]:   umask: 0
2018-01-16T18:43:29.067638+00:00 app[web.1]:   initgroups: False
2018-01-16T18:43:29.067639+00:00 app[web.1]:   tmp_upload_dir: None
2018-01-16T18:43:29.067640+00:00 app[web.1]:   secure_scheme_headers: {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-SSL': 'on'}
2018-01-16T18:43:29.067641+00:00 app[web.1]:   forwarded_allow_ips: ['*']
2018-01-16T18:43:29.067642+00:00 app[web.1]:   accesslog: -
2018-01-16T18:43:29.067644+00:00 app[web.1]:   access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s"
2018-01-16T18:43:29.067644+00:00 app[web.1]:   errorlog: -
2018-01-16T18:43:29.067645+00:00 app[web.1]:   loglevel: debug
2018-01-16T18:43:29.067646+00:00 app[web.1]:   capture_output: False
2018-01-16T18:43:29.067647+00:00 app[web.1]:   logger_class: gunicorn.glogging.Logger
2018-01-16T18:43:29.067648+00:00 app[web.1]:   logconfig: None
2018-01-16T18:43:29.067649+00:00 app[web.1]:   syslog_addr: udp://localhost:514
2018-01-16T18:43:29.067650+00:00 app[web.1]:   syslog: False
2018-01-16T18:43:29.067651+00:00 app[web.1]:   syslog_prefix: None
2018-01-16T18:43:29.067652+00:00 app[web.1]:   syslog_facility: user
2018-01-16T18:43:29.067654+00:00 app[web.1]:   statsd_host: None
2018-01-16T18:43:29.067655+00:00 app[web.1]:   statsd_prefix:
2018-01-16T18:43:29.067653+00:00 app[web.1]:   enable_stdio_inheritance: False
2018-01-16T18:43:29.067658+00:00 app[web.1]:   pythonpath: None
2018-01-16T18:43:29.067656+00:00 app[web.1]:   proc_name: None
2018-01-16T18:43:29.067659+00:00 app[web.1]:   paste: None
2018-01-16T18:43:29.067657+00:00 app[web.1]:   default_proc_name: extend_sp_radii.wsgi
2018-01-16T18:43:29.067660+00:00 app[web.1]:   on_starting: <function OnStarting.on_starting at 0x7fe971d827b8>
2018-01-16T18:43:29.067661+00:00 app[web.1]:   on_reload: <function OnReload.on_reload at 0x7fe971d82950>
2018-01-16T18:43:29.067662+00:00 app[web.1]:   when_ready: <function WhenReady.when_ready at 0x7fe971d82ae8>
2018-01-16T18:43:29.067663+00:00 app[web.1]:   pre_fork: <function Prefork.pre_fork at 0x7fe971d82c80>
2018-01-16T18:43:29.067664+00:00 app[web.1]:   post_fork: <function Postfork.post_fork at 0x7fe971d82e18>
2018-01-16T18:43:29.067665+00:00 app[web.1]:   post_worker_init: <function PostWorkerInit.post_worker_init at 0x7fe971d8b048>
2018-01-16T18:43:29.067667+00:00 app[web.1]:   worker_abort: <function WorkerAbort.worker_abort at 0x7fe971d8b378>
2018-01-16T18:43:29.067666+00:00 app[web.1]:   worker_int: <function WorkerInt.worker_int at 0x7fe971d8b1e0>
2018-01-16T18:43:29.067668+00:00 app[web.1]:   pre_exec: <function PreExec.pre_exec at 0x7fe971d8b510>
2018-01-16T18:43:29.067669+00:00 app[web.1]:   pre_request: <function PreRequest.pre_request at 0x7fe971d8b6a8>
2018-01-16T18:43:29.067670+00:00 app[web.1]:   post_request: <function PostRequest.post_request at 0x7fe971d8b7b8>
2018-01-16T18:43:29.067671+00:00 app[web.1]:   child_exit: <function ChildExit.child_exit at 0x7fe971d8b950>
2018-01-16T18:43:29.067672+00:00 app[web.1]:   worker_exit: <function WorkerExit.worker_exit at 0x7fe971d8bae8>
2018-01-16T18:43:29.067673+00:00 app[web.1]:   nworkers_changed: <function NumWorkersChanged.nworkers_changed at 0x7fe971d8bc80>
2018-01-16T18:43:29.067674+00:00 app[web.1]:   on_exit: <function OnExit.on_exit at 0x7fe971d8be18>
2018-01-16T18:43:29.067675+00:00 app[web.1]:   proxy_protocol: False
2018-01-16T18:43:29.067676+00:00 app[web.1]:   proxy_allow_ips: ['127.0.0.1']
2018-01-16T18:43:29.067677+00:00 app[web.1]:   keyfile: None
2018-01-16T18:43:29.067678+00:00 app[web.1]:   certfile: None
2018-01-16T18:43:29.067679+00:00 app[web.1]:   ssl_version: 2
2018-01-16T18:43:29.067680+00:00 app[web.1]:   cert_reqs: 0
2018-01-16T18:43:29.067681+00:00 app[web.1]:   ca_certs: None
2018-01-16T18:43:29.067682+00:00 app[web.1]:   suppress_ragged_eofs: True
2018-01-16T18:43:29.067683+00:00 app[web.1]:   do_handshake_on_connect: False
2018-01-16T18:43:29.067684+00:00 app[web.1]:   ciphers: TLSv1
2018-01-16T18:43:29.067741+00:00 app[web.1]:   raw_paste_global_conf: []
2018-01-16T18:43:29.068476+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [INFO] Starting gunicorn 19.7.1
2018-01-16T18:43:29.069362+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [DEBUG] Arbiter booted
2018-01-16T18:43:29.069534+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [INFO] Listening at: http://0.0.0.0:48177 (4)
2018-01-16T18:43:29.069693+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [INFO] Using worker: sync
2018-01-16T18:43:29.073666+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [8] [INFO] Booting worker with pid: 8
2018-01-16T18:43:29.078910+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [4] [DEBUG] 2 workers
2018-01-16T18:43:29.079662+00:00 app[web.1]: [2018-01-16 18:43:29 +0000] [9] [INFO] Booting worker with pid: 9
2018-01-16T18:43:30.447420+00:00 heroku[web.1]: State changed from starting to up
2018-01-16T18:43:49.109780+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:8)
2018-01-16T18:43:49.109987+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:9)
2018-01-16T18:43:49.110840+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [9] [INFO] Worker exiting (pid: 9)
2018-01-16T18:43:49.110842+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [8] [INFO] Worker exiting (pid: 8)
2018-01-16T18:43:49.281692+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [30] [INFO] Booting worker with pid: 30
2018-01-16T18:43:49.380464+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [32] [INFO] Booting worker with pid: 32
2018-01-16T18:43:49.377014+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [4] [DEBUG] 1 workers
2018-01-16T18:43:49.448823+00:00 app[web.1]: [2018-01-16 18:43:49 +0000] [4] [DEBUG] 2 workers
2018-01-16T18:43:50.022770+00:00 app[web.1]: [2018-01-16 18:43:50 +0000] [4] [INFO] Shutting down: Master
2018-01-16T18:43:50.127138+00:00 heroku[web.1]: Process exited with status 0
2018-01-16T18:44:09.485886+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:30)
2018-01-16T18:44:09.486055+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:32)
2018-01-16T18:44:09.486851+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [30] [INFO] Worker exiting (pid: 30)
2018-01-16T18:44:09.487248+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [32] [INFO] Worker exiting (pid: 32)
2018-01-16T18:44:09.668483+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [48] [INFO] Booting worker with pid: 48
2018-01-16T18:44:09.714502+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [4] [DEBUG] 1 workers
2018-01-16T18:44:09.717941+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [49] [INFO] Booting worker with pid: 49
2018-01-16T18:44:09.730783+00:00 app[web.1]: [2018-01-16 18:44:09 +0000] [4] [DEBUG] 2 workers
2018-01-16T18:44:29.767004+00:00 app[web.1]: [2018-01-16 18:44:29 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:48)
2018-01-16T18:44:29.767176+00:00 app[web.1]: [2018-01-16 18:44:29 +0000] [4] [CRITICAL] WORKER TIMEOUT (pid:49)
2018-01-16T18:44:29.767790+00:00 app[web.1]: [2018-01-16 18:44:29 +0000] [49] [INFO] Worker exiting (pid: 49)
2018-01-16T18:44:29.773510+00:00 app[web.1]: [2018-01-16 18:44:29 +0000] [48] [INFO] Worker exiting (pid: 48)
2018-01-16T18:44:30.021919+00:00 app[web.1]: [2018-01-16 18:44:30 +0000] [66] [INFO] Booting worker with pid: 66
2018-01-16T18:44:30.029798+00:00 app[web.1]: [2018-01-16 18:44:30 +0000] [67] [INFO] Booting worker with pid: 67 

一段时间后或尝试访问页面时,我收到 H12 错误:

2018-01-16T18:37:51.863461+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=GET path="/admin" host=extend-sp-radii-new.herokuapp.com request_id=a709bf23-e1f8-42c9-9e7e-3aeb0eeccf58 fwd="130.91.250.209" dyno=web.1 connect=0ms service=30001ms status=503 bytes=0 protocol=https

不幸的是,我不认为这些很能说明问题,除了 heroku 似乎不允许任何超过 30 秒的内容

https://devcenter.heroku.com/articles/error-codes#h12-request-timeout

https://devcenter.heroku.com/articles/request-timeout

事实上,我通过使用 Procfile 中的以下行将超时设置为仅 20 秒(如日志输出所示)

web: gunicorn extend_sp_radii.wsgi --timeout 20 --keep-alive 5 --log-level debug --log-file -

但是,这只是尝试获取更多信息,使用(最大值)30秒时会出现相同的问题。我现在面临的问题是弄清楚问题到底是什么以及该怎么做。我看到了以下可能性:

  1. 这真的是一个错误吗,因为我的应用程序在 太慢了?可以测试/预防吗?
  2. 是一些可以在不更改应用程序的情况下修复的英雄/古尼角兽问题吗?
  3. heroku(至少它的免费计划)根本无法托管我的应用程序,我应该开始哭泣吗?

如果这可能有所帮助,我很乐意提供任何其他信息,包括完整的应用程序。希望任何人都有想法。

(我从Windows运行,数据库是postgresql)

好的,我想我可以给出一个半途而废的答案。

我认为这确实是一个限制,即如果 heroku 允许以更大的限制运行 gunicorn,则不会发生此错误。简而言之,在我的主要 python model.py 中,我正在初始化数据库(我需要能够更新它,所以这只是一种方便的方法)。但是,此步骤当然也可以分开处理。我现在这样做了,应用程序像魅力一样运行。我仍然需要仔细检查我是否可以以我想要的方式更新我的数据库,但无论如何,删除数据库(重新)初始化,这似乎需要超过 30 秒的时间(尽管它不是本地),解决了我的问题。

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