RetryError using batch() on App Engine Flex

Hi,
I get the following exception using the batch() api on AppEngine Flex.

    batch = vision_client.batch()
    for blob in blobs:
            content = blob.download_as_string()
            image = vision_client.image(content=content)
            batch.add_image(image, FEATURES)
    results = batch.detect()

DEBUG:google_auth_httplib2:Making request: POST https://accounts.google.com/o/oauth2/token
ERROR:root:Exception occurred in retry method that was not classified as transient
<class 'google.gax.errors.RetryError'>

Package:
google-cloud-vision (0.23.2)

[theacodes]

@sprakash3 do you have any other logs? The RetryError seems to be obscuring the real error.

/cc @lukesneeringer

[lukesneeringer]

I will look into changing this to raise the actual error.

@jonparrott @lukesneeringer Some of the images in the batch request exceeded the resource limit for the vision api. I'll have to figure out a way to get around them.
Thanks

[daspecster]

@sprakash3 do you have an example I could use to reproduce the same error that you were getting?

@daspecster Any image greater than 4 MB in size would result in this error. I'm sorry i cant share the image.

[daspecster]

Thanks @sprakash3! That information is what I needed.

[engelke]

Closing this issue as dealt with above.