Additional info: I have an "Update contact" job in the worker queue that has been stuck for 6 days. The contact is: hexbear.net/u/Florn

As I've noticed previously, this is a contact with an animated GIF as an avatar. Every time this happened, blocking the contact, and deleting the job from the worker queue, fixes the problem.

This is happening on both 2024.03 and 2024.08

Further update: Confirmed that purging the contact makes the error go away.

Maybe this is a problem with avatar graphics that are too large, and it just keeps trying forever rather than backing off gracefully?

OK, more digging. It's failing in line 231 of /var/www/html/src/Object/Image.php.

Which is this:

} catch (\Throwable $error) {
			/** @see https://github.com/php/doc-en/commit/d09a881a8e9059d11e756ee59d75bf404d6941ed */
			if (strstr($error->getMessage(), "gd-webp cannot allocate temporary buffer")) {
				DI::logger()->notice('Image is probably animated and therefore unsupported', ['message' => $error->getMessage(), 'code' => $error->getCode(), 'trace' => $error->getTraceAsString(), 'file' => $this->filename]);
			} else {
				DI::logger()->warning('Unexpected throwable.', ['message' => $error->getMessage(), 'code' => $error->getCode(), 'trace' => $error->getTraceAsString(), 'file' => $this->filename]);
			}

So my suspicion was right: it's animated GIF avatars which are causing this. However, rather than fail gracefully, I'm left with a zombie worker job which seems to persist forever.