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More informative error messages and logs for book creation failures
Open, Needs TriagePublic


We should display and collect information on the book creation failures, so that the users can act on them either by working around them or by reporting the most important and recurring failures. Statistics on the logs will also allow us to monitor the trend and gauge whether things are getting any better/worse (logging success would help monitor the usage trends as well).

Currently, the many reports on "Rendering process died with non zero code: 1" are hard to debug or work around, because they require someone to install OCG locally and test the wikitext against it.

Collection already has some log channels, which are enabled on Wikimedia wikis (6c8d2d4b (C. Scott Ananian 2014-10-22 11:52:05 -0400 4242) 'collection' => "udp://$wmfUdp2logDest/collection", // -cscott for bug 71675):

305:                    wfDebugLog( 'collection', "Request to $serveURL resulted in error" );
329:                            wfDebugLog( 'collection', "Server returned bogus data: $data" );
333:                            wfDebugLog( 'collection', "Server returned error: {$this->getError()}" );

It's possible that additional logging is needed and/or that some conversion to other logging systems is desired.

To be clear, it would be nice if output such as was relayed to the user.

Event Timeline

Nemo_bis created this task.Aug 14 2016, 4:05 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 14 2016, 4:05 PM
Nemo_bis updated the task description. (Show Details)Aug 14 2016, 4:45 PM
Nemo_bis updated the task description. (Show Details)Aug 14 2016, 5:56 PM

As already announced in Tech News, OfflineContentGenerator (OCG) will not be used anymore after October 1st, 2017 on Wikimedia sites. OCG will be replaced by Electron. You can read more on

mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:11 PM