[ome-users] Server error (500). Why is this displayed

Mon Jun 9 10:52:34 BST 2014

Hi John

It sounds like you stopped OMERO.web successfully, I can't think of anything else that would be running other than django. The traceback error is occurring in the OMERO.web 404 error handler- it looks like the logging module in Python 2.4 doesn't support the additional 'extra' parameter used in omeroweb/feedback/views.py:160. Unfortunately this makes it difficult to figure out what the exact error is!

Could you check your Apache logs for clues?
/var/log/httpd/access_log and particularly /var/log/httpd/error_log

One other thing you could try is enabling debug mode in OMERO.web to see if that gives any additional information:
omero config set omero.web.debug True
but remember to disable it once the problem is fixed

Cheers

Simon

On 6 Jun 2014, at 16:20, John Webber (NBI) <John.Webber at nbi.ac.uk<mailto:John.Webber at nbi.ac.uk>> wrote:

Hi Simon,

Thanks for your quick response (as normal!) ;-)

I have stopped and restarted OMERO.web, as requested, using “<omero>/bin/omero web stop” and “<omero>/bin/omero web start”.  Once I had stopped OMERO.web, all of the “django” processes did stop correctly.  Are there any other processes that I should check as well?

OMERO.web stopped and restarted successfully, but the “/opt/Omero/var/log/OMEROweb.log” log file is STILL not being written to.  There are also no other OMEROweb.log files on the system.

The “Server Error (500)” message that I am seeing includes the following error message:

Traceback (most recent call last):

  File "/opt/OMERO.server-4.4.8p1-ice33-b304/lib/python/django/core/handlers/base.py", line 150, in get_response
    response = callback(request, **param_dict)

  File "/opt/OMERO.server-4.4.8p1-ice33-b304/lib/python/omeroweb/feedback/views.py", line 160, in handler404
   extra={

  File "/usr/lib64/python2.4/logging/__init__.py", line 983, in warning
    apply(self._log, (WARNING, msg, args), kwargs)

TypeError: _log() got an unexpected keyword argument 'extra'

<WSGIRequest
GET:<QueryDict: {}>,
POST:<QueryDict: {}>,
COOKIES:{'sessionid': '249cf076455eda32b05b4212a84d86eb'},
META:{'DOCUMENT_ROOT': '/var/www/html',
'GATEWAY_INTERFACE': 'CGI/1.1',
'HTTPS': 'on',
'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch',
'HTTP_ACCEPT_LANGUAGE': 'en-US,en;q=0.8',
'HTTP_CACHE_CONTROL': 'max-age=0',
'HTTP_CONNECTION': 'keep-alive',
'HTTP_COOKIE': 'sessionid=249cf076455eda32b05b4212a84d86eb',
'HTTP_HOST': 'open-omero.nbi.ac.uk<http://open-omero.nbi.ac.uk/>',
'HTTP_REFERER': 'https://open-omero.nbi.ac.uk/webclient/login/?url=FwebclientF',
'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36',
'PATH': '/sbin:/usr/sbin:/bin:/usr/bin',
'PATH_INFO': u'/webclient/login/FwebclientF',
'PATH_TRANSLATED': '/opt/OMERO.server-4.4.8p1-ice33-b304/var/omero.fcgi/webclient/login/FwebclientF',
'QUERY_STRING': '',
'REMOTE_ADDR': '149.155.213.117',
'REMOTE_PORT': '61082',
'REQUEST_METHOD': 'GET',
'REQUEST_URI': '/webclient/login/FwebclientF',
'SCRIPT_FILENAME': '/opt/OMERO.server-4.4.8p1-ice33-b304/var/omero.fcgi',
'SCRIPT_NAME': u'',
'SERVER_ADDR': '149.155.214.217',
'SERVER_ADMIN': 'root at localhost',
'SERVER_NAME': 'open-omero.nbi.ac.uk<http://open-omero.nbi.ac.uk/>',
'SERVER_PORT': '443',
'SERVER_PROTOCOL': 'HTTP/1.1',
'SERVER_SIGNATURE': '<address>Apache/2.2.3 (CentOS) Server at open-omero.nbi.ac.uk<http://open-omero.nbi.ac.uk/> Port 443</address>\n',
'SERVER_SOFTWARE': 'Apache/2.2.3 (CentOS)',
'wsgi.errors': <flup.server.fcgi_base.TeeOutputStream object at 0x10548090>,
'wsgi.input': <flup.server.fcgi_base.InputStream object at 0x10548510>,
'wsgi.multiprocess': True,
'wsgi.multithread': False,
'wsgi.run_once': False,
'wsgi.url_scheme': 'https',
'wsgi.version': (1, 0)}>”

Please can you advise how it is best to proceed with this issue?

Thanks
John

From: Simon Li [mailto:s.p.li at dundee.ac.uk<http://dundee.ac.uk>]
Sent: 06 June 2014 15:06
To: John Webber (NBI)
Subject: Re: [ome-users] Server error (500). Why is this displayed

Hi John

You're right, I should've said OMEROweb.log. The fact that it's empty is a bit strange though. Is it possible you've got an old OMERO.web running from a previous server upgrade? Could you run `omero web stop`, then verify all relevant processes are killed (you can use something like `ps -ef | grep django` to check). If there are any still present you can try killing them manually, then restart OMERO.web?

If that doesn't work then could you copy and paste the error message from the dialog- if there's no private information it would be helpful if you could CC the ome-users list, so that people don't see a hanging conversation. If we still can't figure out the problem then server credentials could be useful.

Hope this helps,

Simon

On 6 Jun 2014, at 11:45, "John Webber (NBI)" <John.Webber at nbi.ac.uk<mailto:John.Webber at nbi.ac.uk>>
 wrote:

Hi Simon,

I’m afraid I am not able to find a log file called  OMERO_web.log!  Where should this be located?

There is a logfile in <omero>/var/log called “OMEROweb.log”, but the date on this file is September, and the file is empty!  There is also a file called “OMEROweb_request.log”, which the same date which is also empty!

I have looked through the blitz log, but this does not seem to contain any errors or warnings at the time when I see this message.  Would you like me to send you a copy of that?

The server is actually available through our firewall, so I can give you credentials on the server for you to see the error occur, if you would like!

Thanks
John

From: Simon Li [mailto:s.p.li at dundee.ac.uk<http://dundee.ac.uk/>]
Sent: 06 June 2014 10:21
To: John Webber (NBI)
Cc: ome-users at lists.openmicroscopy.org.uk<mailto:ome-users at lists.openmicroscopy.org.uk>
Subject: Re: [ome-users] Server error (500). Why is this displayed

Hi John

You should be able to login from multiple browsers/locations without errors. Could you send us your OMERO_web.log?

Thanks

Simon

On 6 Jun 2014, at 10:34, John Webber (NBI) <John.Webber at nbi.ac.uk<mailto:John.Webber at nbi.ac.uk>> wrote:

Hi,

I have built a new omero server, but during testing I sometimes see the following “Server Error (500)” screen when I log in.  I am using Omero 4.4.8 with ice 3.3.

I notice that this seems to occur when I access the same user account from different computers or browsers.  Is this because I have not logged out correctly from another sessions?  Is there a way to remove the likelihood of users seeing this screen?

Thanks
John

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