Wikisource Export: "Unable to launch a new process"
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Authored By

	dom_walden
	Oct 30 2020, 9:14 AM

Description

What is the problem?

Some ebooks produce (intermittently) the error on wsexport-test:

Message:  Uncaught PHP Exception Symfony\Component\Process\Exception\RuntimeException: "Unable to launch a new process." at /var/www/tool/vendor/symfony/process/Process.php line 338  
Time:  2020-10-30T09:07:20.188561+00:00  
Channel:  request  
Context:   exception:  {    
         "class": "Symfony\\Component\\Process\\Exception\\RuntimeException",    
         "message": "Unable to launch a new process.",    
         "code": 0,    
         "file": "/var/www/tool/vendor/symfony/process/Process.php:338",    
         "trace": [    
             "/var/www/tool/vendor/symfony/process/Process.php:232",    
             "/var/www/tool/vendor/symfony/process/Process.php:251",    
             "/var/www/tool/src/FontProvider.php:68",    
             "/var/www/tool/vendor/symfony/cache/LockRegistry.php:99",    
             "/var/www/tool/vendor/symfony/cache/Traits/ContractsTrait.php:88",    
             "/var/www/tool/vendor/symfony/cache-contracts/CacheTrait.php:70",    
             "/var/www/tool/vendor/symfony/cache/Traits/ContractsTrait.php:95",    
             "/var/www/tool/vendor/symfony/cache-contracts/CacheTrait.php:33",    
             "/var/www/tool/src/FontProvider.php:91",    
             "/var/www/tool/src/FontProvider.php:153",    
             "/var/www/tool/src/FontProvider.php:176",    
             "/var/www/tool/src/Generator/EpubGenerator.php:406",    
             "/var/www/tool/src/Generator/EpubGenerator.php:59",    
             "/var/www/tool/src/Generator/ConvertGenerator.php:136",    
             "/var/www/tool/src/Generator/ConvertGenerator.php:121",    
             "/var/www/tool/src/BookCreator.php:52",    
             "/var/www/tool/src/Controller/ExportController.php:91",    
             "/var/www/tool/src/Controller/ExportController.php:62",    
             "/var/www/tool/vendor/symfony/http-kernel/HttpKernel.php:157",    
             "/var/www/tool/vendor/symfony/http-kernel/HttpKernel.php:79",    
             "/var/www/tool/vendor/symfony/http-kernel/Kernel.php:196",    
             "/var/www/tool/public/index.php:35"    
         ]    
     }    
Extra:   host:  wsexport-test.wmflabs.org    
   uri:  http://wsexport-test.wmflabs.org/book.php?fonts=&format=pdf-a4&lang=fr&page=Dictionnaire_infernal%2F6e_%C3%A9d.%2C_1863

Links to reproduce problem

These have reproduced the issue in the past, although now I find that 1 and 3 produce successfully, and 2 occasionally produces the error (it has happened 2 out of the last three times I tried).

Related Objects

Mentioned In: T263577: Wikisource: Implement adding Symfony 5 to WSExport

Event Timeline

dom_walden created this task.Oct 30 2020, 9:14 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptOct 30 2020, 9:14 AM

dom_walden updated the task description. (Show Details)Oct 30 2020, 9:34 AM

dom_walden updated the task description. (Show Details)Oct 30 2020, 9:48 AM

dom_walden mentioned this in T263577: Wikisource: Implement adding Symfony 5 to WSExport.Oct 30 2020, 10:08 AM

ifried moved this task from New & TBD Tickets to Needs Discussion on the Community-Tech board.Oct 30 2020, 2:17 PM

This has been seen on production 5 times since 18th Nov. Total number of downloads in November was ~65000.

Thank you for this update on how often the issue is occurring, @dom_walden!

I'm unable to reproduce this issue at this time with any of the links provided. Perhaps our recent work helped this issue? @dom_walden Are you able to reproduce it? Do you think we should close this ticket?

In T266854#6807091, @ifried wrote:

I'm unable to reproduce this issue at this time with any of the links provided. Perhaps our recent work helped this issue? @dom_walden Are you able to reproduce it? Do you think we should close this ticket?

Nor can I, on either test or prod.

We have seen a couple of these errors in the wild over the last week or so. They occured with:

But, I have not been able to reproduce the error with either of those. The first timed out. The second exported correctly.

So, I don't know what we should do :P

ifried moved this task from Needs Discussion to Older: Team Work on the Community-Tech board.May 3 2021, 10:39 PM

Wikisource Export: "Unable to launch a new process"Open, Needs TriagePublicBUG REPORTActions