=== Error ===
Request URL:
Request ID: `INSERT_ID`
```name=message
UploadChunkFileException: Error storing file in '/tmp/phpYHAPWZ': backend-fail-internal; local-swift-codfw
```
```name=trace,lines=10
#0 /srv/mediawiki/php-1.34.0-wmf.14/includes/upload/UploadFromChunks.php(275): UploadFromChunks->outputChunk(string)
#1 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiUpload.php(226): UploadFromChunks->addChunk(string, integer, integer)
#2 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiUpload.php(132): ApiUpload->getChunkResult(array)
#3 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiUpload.php(104): ApiUpload->getContextResult()
#4 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiMain.php(1583): ApiUpload->execute()
#5 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiMain.php(531): ApiMain->executeAction()
#6 /srv/mediawiki/php-1.34.0-wmf.14/includes/api/ApiMain.php(502): ApiMain->executeActionWithErrorHandling()
#7 /srv/mediawiki/php-1.34.0-wmf.14/api.php(86): ApiMain->execute()
#8 /srv/mediawiki/w/api.php(3): require(string)
#9 {main}
```
=== Impact ===
Unknown. [Special:NewFiles](https://commons.wikimedia.org/wiki/Special:NewFiles) still shows new files being uploaded, so at least it’s not preventing all uploads.
=== Notes ===
From logstash:
* New in 1.34-wmf.14.
* Affects commons.wikimedia.org (naturally).
* Seen several dozen times already in the short time it's been out.