Split Channel View generates Error

[rpoehlmann]

Dear OMERO Team,

our users report back to us that "split channel" view is no longer working.
The WebGUI shows an empty "loading ..." page without image.

The OMEROweb.log file as well as diagnostic output from omero.web.debug shows:

Code: Select all

Request Method:    GET
Request URL:    https://omerodev.biozentrum.unibas.ch/webclient/render_split_channel/335097/0/0/?c=1%7C0:3012$FF0013,2%7C0:7632$00A0FF&m=c&p=split&ia=0&q=0.9&maps=[%7B%22reverse%22:%7B%22enabled%22:false%7D%7D,%7B%22reverse%22:%7B%22enabled%22:false%7D%7D]
Django Version:    1.8.18
Exception Type:    IOError
Exception Value:    

cannot write mode RGBA as JPEG

Exception Location:    /home/omeronas/omeroweb/lib/python2.7/site-packages/PIL/JpegImagePlugin.py in _save, line 607
Python Executable:    /home/omeronas/omeroweb/bin/python2
Python Version:    2.7.5
Python Path:    

['/home/omeronas/OMERO.server-5.3.4-ice36-b69/lib/python/omeroweb',
'/home/omeronas/omeroweb/bin',
'/home/omeronas/OMERO.server/lib/python',
'/home/omeronas/OMERO.server/var/lib',
'/home/omeronas/OMERO.server/lib/fallback',
'/home/omeronas/omeroweb/lib64/python27.zip',
'/home/omeronas/omeroweb/lib64/python2.7',
'/home/omeronas/omeroweb/lib64/python2.7/plat-linux2',
'/home/omeronas/omeroweb/lib64/python2.7/lib-tk',
'/home/omeronas/omeroweb/lib64/python2.7/lib-old',
'/home/omeronas/omeroweb/lib64/python2.7/lib-dynload',
'/usr/lib64/python2.7',
'/usr/lib/python2.7',
'/home/omeronas/omeroweb/lib/python2.7/site-packages',
'/usr/lib64/python2.7/site-packages',
'/usr/lib64/python2.7/site-packages/gtk-2.0',
'/usr/lib/python2.7/site-packages',
'/home/omeronas/OMERO.server/lib/python/omeroweb']

Server time:    Tue, 24 Oct 2017 10:56:42 +0100


Unfortunately, our users also claime that it had been working before and started to fail out of the blue. I can confirm this since I can detect those

Code: Select all

raise IOError("cannot write mode %s as JPEG" % im.mode)


starting after a certain date.

Unfortunately, nothing was changed from our side on the system, which is OMERO.server-5.3.4-ice36-b69, Pillow (4.2.1). Upgrade to Pilliow 4.3.0 also did not change anything.

Is this the https://github.com/python-pillow/Pillow/issues/2609 kind of problem? Why did it work before?

To be honest, I am kind of lost. Any supportive input would be greatly appreciated.

Thanks & best regards,
-Rainer

[wmoore]

Hi,

It looks like you need to use a different version of Pillow since this error is from 4.2.0
https://github.com/python-pillow/Pillow/issues/2609

Our requirement for OMERO.web is for <3.4, see
https://github.com/openmicroscopy/openm ... 27-all.txt

So Pillow 3.3.0 should work fine.

Our install process should have used this requirements.txt to install the correct version.
Is this what you did or has something changed since.
Any suggestions for docs fixes / improvements are always welcome.

Regards,

Will.

[rpoehlmann]

Hi Will,

thanks a lot for the quick response. Downgrade to Pillow 3.3.3 did solve the issue, perfect!

Obviously my fault, I somehow overlooked this tiny little detail although written in the documentation albeit slightly hidden as a footnote. Most likely I also paid more attention towards "requirements-py27.txt" and kind of missed "requirements-py27-all.txt".

Regards,
Rainer