Image Transformations Failing With Empty TransformationError exception

[PandaSuit]

This appears to have been an issue in March and then it just went
away. It is back now:
http://code.google.com/p/googleappengine/issues/detail?id=4775

Is anyone else having an issue where large (> 4MB) images
inconsistently fail to transform using the images API?

My snipped of code (which has been working perfectly with images up to
20MB before last week) is;

def loadImage(image_data=None, blob_key=None):
image = images.Image(image_data=image_data, blob_key=blob_key)
image.rotate(degrees=90)
image =
images.Image(image_data=image.execute_transforms(output_encoding=images.JPEG))
return image

I always call this function using a blob_key and the part that is
throwing the exception is the "image.execute_transforms()" function.
It does not seem to matter whether I give it a JPG or a PNG.

The traceback:

Traceback (most recent call last):
File "/base/data/home/apps/s~mediacooler-app/1-28.350162602241030413/
article/upload.py", line 39, in post
img = article.funcs.loadImage(blob_key=str(blob_info.key()))
File "/base/data/home/apps/s~mediacooler-app/1-28.350162602241030413/
article/funcs.py", line 213, in loadImage
image =
images.Image(image_data=image.execute_transforms(output_encoding=images.JPEG))
File "/base/python_runtime/python_lib/versions/1/google/appengine/
api/images/__init__.py", line 673, in execute_transforms
raise TransformationError()
TransformationError

According to the images API code in the SDK execute_transforms raises
a "TransformtionError when something errors during image
manipulation." In the code this happens only when the images service
returns an ImagesServiceError.UNSPECIFIED_ERROR.

It is really disturbing to have a piece of code be rock solid for
months (under load) and then start throwing exceptions out of the
blue. Real customers are using my service so this is a critical issue
for me.

- Bryce

[Johan Euphrosine]

Hi Bryce,

Sorry for the late followup,

It seems that you got many errors when trying to upload the same large
image on 2011/05/06 around 09:34.

I can you share this image with us (privately if needed), that might
help to narrow it down further.

Thanks in advance.

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Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

[dala...@googlemail.com]

Hello. Please help if possible! We are having a similar issue now with www.historypin.com. Images pulled from the blobstore are not loading at all. We have over 50k images in the blobstore 
Code that hasn't been changed for quite some time seems to be throwing TransformationError. I did attempt to do a bulk upload in the morning but I can't see how that would have broken the  image serving across the entire site.

Error below:

Exception in request:
Traceback (most recent call last):
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/core/handlers/base.py", line 92, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/application/urls.py", line 72, in free_pattern
    return view_fn(request, **paramArray)
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/application/controllers/services.py", line 51, in thumb
    contents_to_use = photo.getThumb(dimensions, quality, crop, nc)
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/application/models/photos.py", line 535, in getThumb
    dimension_image = dimension_image.execute_transforms(quality = 1, output_encoding = images.JPEG)
  File "/base/python_runtime/python_lib/versions/1/google/appengine/api/images/__init__.py", line 763, in execute_transforms
    raise TransformationError()
TransformationError
<type 'exceptions.KeyError'>: 'request'
Traceback (most recent call last):
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/appenginepatch/main.py", line 36, in real_main
    util.run_wsgi_app(application)
  File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/util.py", line 98, in run_wsgi_app
    run_bare_wsgi_app(add_wsgi_middleware(application))
  File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/util.py", line 116, in run_bare_wsgi_app
    result = application(env, _start_response)
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/core/handlers/wsgi.py", line 241, in __call__
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/core/handlers/base.py", line 134, in get_response
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/core/handlers/base.py", line 166, in handle_uncaught_exception
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/views/defaults.py", line 24, in server_error
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 178, in render
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 779, in render
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 792, in render_node
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/template/loader_tags.py", line 97, in render
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 178, in render
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 779, in render
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/__init__.py", line 792, in render_node
    
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/application/templatetags/fragments.py", line 38, in render
    if context['request']:
  File "/base/data/home/apps/historypin/vs3-12.357532709011180491/common/zip-packages/django-1.1.zip/django/template/context.py", line 44, in __getitem__

Thanks

Michael

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