AWS Elastic Beanstalk-脚本在返回标头之前超时：application.py

我在AWS上有一个现有的Elastic Beanstalk flask应用程序，该应用程序有时不会初始化并给出以下错误：

[Mon Jan 23 10:06:51.550205 2017] [core:error] [pid 7331] [client  127.0.0.1:43790] script timed out before returning headers: application.py
[Mon Jan 23 10:10:43.910014 2017] [core:error] [pid 7329] [client 127.0.0.1:43782] End of script output before headers: application.py

任何想法为什么会这样？最近，我改变了项目的requirements.txt包括pandas==0.19.2。在进行此更改之前，该程序将运行几天，然后返回相同的错误。更多日志/程序详细信息：

[Mon Jan 23 10:05:36.877664 2017] [suexec:notice] [pid 7323] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexeC)
[Mon Jan 23 10:05:36.886151 2017] [so:warn] [pid 7323] AH01574: module wsgi_module is already loaded,skipping
AH00557: httpd: apr_sockaddr_info_get() failed for ip-10-55-254-33
AH00558: httpd: Could not reliably determine the server's fully qualified domain name,using 127.0.0.1. Set the 'ServerName' directive globally to suppress this message
[Mon Jan 23 10:05:36.887302 2017] [auth_digest:notice] [pid 7323] AH01757: generaTing secret for digest authentication ...
[Mon Jan 23 10:05:36.887797 2017] [lbmethod_heartbeat:notice] [pid 7323] AH02282: No slotmem from mod_heartmonitor
[Mon Jan 23 10:05:36.887828 2017] [:warn] [pid 7323] mod_wsgi: Compiled for Python/2.7.10.
[Mon Jan 23 10:05:36.887832 2017] [:warn] [pid 7323] mod_wsgi: Runtime using Python/2.7.12.
[Mon Jan 23 10:05:36.889729 2017] [mpm_prefork:notice] [pid 7323] AH00163: Apache/2.4.23 (Amazon) mod_wsgi/3.5 Python/2.7.12 configured -- resuming normal operations
[Mon Jan 23 10:05:36.889744 2017] [core:notice] [pid 7323] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Mon Jan 23 10:06:43.542607 2017] [core:error] [pid 7328] [client 127.0.0.1:43786] Script timed out before returning headers: application.py
[Mon Jan 23 10:06:47.548360 2017] [core:error] [pid 7330] [client 127.0.0.1:43788] Script timed out before returning headers: application.py
[Mon Jan 23 10:06:51.550205 2017] [core:error] [pid 7331] [client 127.0.0.1:43790] Script timed out before returning headers: application.py
[Mon Jan 23 10:10:43.910014 2017] [core:error] [pid 7329] [client 127.0.0.1:43782] End of script output before headers: application.py

application.py

import flask
from flask import request,Response
import logging
import json
import JobType1
import JobType2
import sys


application = flask.Flask(__name__)
application.config.from_object('default_config')
application.debug = application.config['FLASK_DEBUG'] in ['true','True']`

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


@application.route('/',methods=['GET'])
def index():
  logger.info("The message received was '/',no action taken")
  response = Response("success",status=200)
  return response


@application.route('/StartJob',methods=['POST'])
def StartJob():
  logger.info("!!start_job message received! This is the start job logger")
  print("!!start_job message received! This is the start job printer")
  response = None

if request.json is None:
    response = Response("Error,no job specified.",status=400)
else:
    message = Dict()

    try:
        if request.json.has_key('TopicArn') and request.json.has_key('message'):
            message = json.loads(request.json['message'])
            job = message['job']
        else:
            message = request.json
            job = message['job']
        date_key = None
        try:
            date_key = message['runkey']
        except Exception as e:
            print "prinTing Exception:"
            print e
            pass
        start_job(job,date_key)
        response = Response("Called Job",status=200)
    except Exception as ex:
        logging.exception("There was an error processing this message: %s" % request.json)
        response = Response("Error processing message",status=400)
return response


@application.route('/Cronmessage',methods=['POST'])
def cron_message():
  logger.info("!!Cron message received! This is the Cron Start Logger")
  response = None
  logger.info("About to print headers of CRON***")
  job = request.headers.get('X-Aws-Sqsd-Taskname')
  start_job(job,NonE)
  response = Response("Called Job",status=200)
  return response


def start_job(job_name,date_key):
  logger.info("JOB NAME SUBMITTED IS:")
  logger.info(job_Name)
  if job_name == 'JobType1':
      start_job_if_not_running(job_name,JobType1.main,True,date_key)
  if job_name == 'JobType2':
    start_job_if_not_running(job_name,JobType2.main,date_key)
  else:
    print "Submitted job nome is invalid,no job started. The invalid submitted job name was %s" % job_name


def start_job_if_not_running(job_name,program_to_execute,uses_date_key_flag,date_key):
  global running_jobs
  logger.info("running_jobs are:")
  logger.info(running_jobs)

  if job_name in running_jobs:
    logger.info("Currently running job " + job_name + ",will not start again.")
    return false
else:
    try:
        running_jobs.append(job_Name)
        if uses_date_key_flag:
            logger.info("")
            program_to_execute(date_key)
        else:
            program_to_execute()
    except Exception as e:
        handle_job_end(job_Name)
        print "Error in " + job_name
        error_message = str(E) + "-" + str(sys.exc_info()[0])
        print error_message
        EmailUsers.main(subject="Error in " + job_name,message=error_message,message_type='error',date_key=date_key,job_name=job_name,process_name='application.py',notification_group='bp_only')
    handle_job_end(job_Name)


def handle_job_end(job_Name):
  while job_name in running_jobs:
    running_jobs.remove(job_Name)

logger.info("Process Complete")

if __name__ == '__main__':
  application.run(host='0.0.0.0',threaded=TruE)

感谢您的帮助，我可以根据需要共享其他文件中的更多代码。

此外，如果我导航到，则会/etc/httpd/conf.d/wsgi.conf看到：

LoadModule wsgi_module modules/mod_wsgi.so
WSGIPythonHome /opt/python/run/baselinenv
WSGISocketPrefix run/wsgi
WSGIReStrictEmbedded On

<VirtualHost *:80>

Alias /static/ /opt/python/current/app/static/
<Directory /opt/python/current/app/static/>
Order allow,deny
Allow from all
</Directory>


WSGIScriptAlias / /opt/python/current/app/application.py


<Directory /opt/python/current/app/>
  require all granted
</Directory>

WSGIDaemonProcess wsgi processes=1 threads=15 display-name=%{GROUP} \
  python-path=/opt/python/current/app:/opt/python/run/venv/lib64/python2.7/site-packages:/opt/python/run/venv/lib/python2.7/site-packages user=wsgi group=wsgi \
  home=/opt/python/current/app
WSGIProcessGroup wsgi
</VirtualHost>

LogFormat "%h (%{X-ForWARDed-For}i) %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined