P: Random white images when exporting or publishing

Group:

I spent a large part of yesterday trying to duplicate this condition. I now have over 5000 JPEGs in the trash created while trying to duplicate the White - Watermark only JPEG file. I have, thus far, been unsuccessful.

I have tried batches from 50 to 750 images with Graphical watermarks (PNG and JPEG), Font-based and Simple watermarks. I have tried resizing the images and not resizing the images. I have run the groups on Win 7 SP1 and Win 8.1. So far, I have yet to see a single White JPEG as described here.

There is either a subtle point of export settings I am missing that is causing this or a system specific configuration.

If anyone wants to share with me via Email the following for testing:
1. Your Export Preset Used
2. Your Watermark Preset Used
3. The graphic used in creating your watermark
I will try and duplicate this again.

My email is flohr **at** adobe **dot** com

As a long shot, has anyone in this thread attempted to create a new preference file?
Close Lightroom - Hold down [Shift][Alt/Opt] while Restarting Lightroom. Overwrite the preferences when prompted?

Win 7 x64
JPEG
Graphical watermark
Not sure if small number of exports exhibits problem since almost always exporting large number.

David - if exporting to JPEG, an easy way to check whether the image is OK is to sort by file-size. The faulty images are a lot smaller.

I have 8 cores on my CPU as well - and the problem only started after replacing the CPU / motherboard.

My test was a brand-new JPG watermark preset. I didn't have any watermark presets, prior.

My raw files are on a USB-attached drive, my watermark JPG is on my C: drive and my export folder was also on the C: drive.

My WM 's have not changed from old version to this some are png some are jpg

Hi Rikk for some reason when I started using LR CC this year before I was previously using a older version from a disc load and this had all my watermarks on presets when the new version was used some presets and transferred others had not 😞 so I had to start afresh with new watermarks .They still do not work sometimes blank file with just the wm on

For me the watermark needs to be graphical. I was using a 1012x789 JPG and see about a 1% white export rate.

I have 8 cores on my CPU... it does looks like a racing condition, you may be on something!

There is clearly some kind of timing-dependent race condition here. I tried reproducing the problem with 1, 2, 4, and 8 CPUs active, and it only occurs for me with 8 CPUs active, with 1 or 2 blanks out of 125 exported. This suggests it's a classic concurrent-programming bug introduced in LR 6 when Adobe made the export pipeline more aggressively parallel.