P: SDK: waitForRender() returnes error in "Publish" (regression)

[BigRedler]

calling waitForRender() in postProcessRenderedPhotos generates an error ("An unknown error occurred. This photo was not rendered") when called in a "Publish" setting. The same code works just fine in "Export" setting. The same code used to run just fine in the past for several years, this issue is new, a regression.

I also was able to reproduce the issue using the creatorfilter.lrdevplugin sample plug-in that is supplied with the SDK.

You can download a sample plugin demonstrating the issue from here: http://eyalredler.com/stuff/lightroom_bug.lrplugin.zip

To reproduce:

1. Add the plugin in "Plugin Manager"

2. Add the plugin (named "Publish Bug Demo") to an export and export - all should be well

3. Add the plugin to a publish and publish - "An unknown error occurred. This photo was not rendered" is presented for each image

Here's the plugin code (2 files):

--[[----------------------------------------------------------------------------
DemoFilterProvider.lua
------------------------------------------------------------------------------]]

-- Lightroom SDK

local LrLogger = import 'LrLogger'
local myLogger = LrLogger( 'libraryLogger' )


myLogger:enable( "print" ) -- or "logfile"


--============================================================================--

local DemoFilterProvider = {}

function DemoFilterProvider.sectionForFilterInDialog(f, p)
	return {
		title = 'Demo Plugin',
		f:row {
			place = "overlapping",
			f:static_text {
						width = leftSideWidth,
						alignment = "center",
						size = 24,
						title = "Demo Plugin"
					}
		}
	}
end

-------------------------------------------------------------------------------

function DemoFilterProvider.postProcessRenderedPhotos( functionContext, filterContext )
	local renditionOptions = {
		plugin = _PLUGIN,
		renditionsToSatisfy = filterContext.renditionsToSatisfy,
		filterSettings = function( renditionToSatisfy, exportSettings )
		end,
	}
			
	
	for sourceRendition, renditionToSatisfy in filterContext:renditions(renditionOptions) do
		local success, pathOrMessage = sourceRendition:waitForRender()

		if success then
-- 		perform some magic
		end
	end
end


function DemoFilterProvider.shouldRenderPhoto( exportSettings, photo )
	return true
end



-------------------------------------------------------------------------------

return DemoFilterProvider
​

--[[----------------------------------------------------------------------------

Info.lua

--------------------------------------------------------------------------------



------------------------------------------------------------------------------]]

return {

	LrSdkVersion = 3.0,
	
	LrSdkMinimumVersion = 2.0,

	LrPluginName = "Publish Bug Demo",
	
	LrToolkitIdentifier = 'com.yourcompany.yourproduct.lrpi',
	
	LrExportFilterProvider = {
		title = "Publish Bug Demo",
		file = 'DemoFilterProvider.lua',
	},
	
	LrPluginInfoUrl = "http://www.yourcompany.com",
	VERSION = { major=1, minor=2, revision=3, build=4, },
}

[John R Ellis]

I see the error too. I'm unfamiliar with publish services so don't have much insight.  When I started LR with the -tracebacks command line switch, I saw these errors appear:

2022-11-29 13:51:11.714 Adobe Lightroom Classic[37140:3253401] 
AgExportRendition:recordRemotePhotoId: can not be called by an export filter
    0: global   assert              - C
    1: method   recordRemotePhotoId - 1692336380:2886+12
    2: method   renditionIsDone     - 1692336380:632+191
    3:          [unnamed]           - 1692336380:2826+6
    4:          [unnamed]           - 179812414:2266+12

Maybe that will give a clue as to the source of the problem or a workaround.

[BigRedler]

Thanks for replying, I'm not familiar with the feature you used to get the log lines, how did you do it?

[John R Ellis]

I saved a copy of Adobe engineer Dan Tull's post from a decade ago (long-since deleted) describing -tracebacks:

dantull

Employee  • 166 Messages  • 3K Points  10 years ago

The "unknown error occurred." message is typically something that can be diagnosed with a logging switch I added in 3.0 for just this purpose. Another example issue that tracebacks is good at diagnosing is the dreaded error switching modules message.

You need to pass -tracebacks to the executable as a command line argument. On windows, you can tweak the shortcut to pass this parameter. On the Mac, you could either make a .command which passes the extra parameter or run LR from Terminal.app directly.

On Windows, these messages can be viewed if you attach WinDbg or run DebugView (note these need to be running _before_ you elicit the error to capture the messages). On the Mac, Console.app can be used to view the traceback output.

Note that not all output from this command corresponds to a bug. It logs each time a Lua "throw". Some of these are errors, but some are throws used to cancel an operation and unroll the call stack.

I've used it enough at this point that I'm thinking I may try to make it easier to use this mode in some future version.

There's additional logging that can be enabled, but it's noisier and more subsystem specific in terms of its use.

https://docs.microsoft.com/en-us/sysinternals/downloads/debugview

[Rikk Flohr: Photography]

adding missing status

[Rikk Flohr: Photography]

Greetings all,

Updates for Adobe Photography products have been released.  The February 2023  updates contain a fix for this issue. 

If you do not see the update in your Creative Cloud Application, you can refresh it by hitting [Ctrl/Cmd]+[Alt/Opt]+[ R ].

Note: It may take up to 24 hours for your update to be available in your Creative Cloud app.

Thank you for your patience.

[John R Ellis]

I confirmed that the test plugin above now executes without error when used with the Hard Drive publishing service.