Topic on Project:Support desk/Flow

If file permissions in folders are not the problem, check out if SELinux is blocking apache from creating the file

Good morning. I seem to be having some issues. I get the following when trying to upload a file: Internal Error [3a9c03ba] 2015-02-15 15:37:53: Fatal exception of type MWException

Any help would be appreciated.

Please add $wgShowExceptionDetails = true; to your LocalSettings.php to see the ful error message and a stack trace. This error message and stack trace you should post here :)

I just got that enabled: [94bbdfd6] /index.php/Special:Upload Exception from line 1871 of /var/www/html/includes/filerepo/file/LocalFile.php: Could not acquire lock for 'Doink.png.'

Backtrace:

1. 0 /var/www/html/includes/filerepo/file/LocalFile.php(1174): LocalFile->lock()
2. 1 /var/www/html/includes/upload/UploadBase.php(738): LocalFile->upload(string, string, string, integer, array, boolean, User)
3. 2 /var/www/html/includes/specials/SpecialUpload.php(467): UploadBase->performUpload(string, string, boolean, User)
4. 3 /var/www/html/includes/specials/SpecialUpload.php(186): SpecialUpload->processUpload()
5. 4 /var/www/html/includes/specialpage/SpecialPage.php(363): SpecialUpload->execute(NULL)
6. 5 /var/www/html/includes/specialpage/SpecialPageFactory.php(584): SpecialPage->run(NULL)
7. 6 /var/www/html/includes/MediaWiki.php(275): SpecialPageFactory::executePath(Title, RequestContext)
8. 7 /var/www/html/includes/MediaWiki.php(584): MediaWiki->performRequest()
9. 8 /var/www/html/includes/MediaWiki.php(435): MediaWiki->main()
10. 9 /var/www/html/index.php(46): MediaWiki->run()
11. 10 {main}

See Thread:Project:Support desk/Problem With File Upload: Could not acquire lock for "mwstore://local-backend/local-public/1/1e". if that helps

This is happening to me also on a fresh install on Centos 7 (3.10.0-123.el7.x86_64)

MediaWiki 1.24.1 PHP 5.4.37 (apache2handler) MySQL 5.6.23

I set these debug options in LocalSettings.php:

# DEBUG
error_reporting( -1 );
ini_set( 'display_errors', 1 );

$wgShowSQLErrors = true;
$wgDebugDumpSql  = true;
$wgShowExceptionDetails = true;
$wgShowDBErrorBacktrace = true;

Backtrace:

#0 /var/www/html/mediawiki-1.24.1/includes/filerepo/file/LocalFile.php(1174): LocalFile->lock()
#1 /var/www/html/mediawiki-1.24.1/includes/upload/UploadBase.php(738): LocalFile->upload(string, string, string, integer, array, boolean, User)
#2 /var/www/html/mediawiki-1.24.1/includes/specials/SpecialUpload.php(467): UploadBase->performUpload(string, string, boolean, User)
#3 /var/www/html/mediawiki-1.24.1/includes/specials/SpecialUpload.php(186): SpecialUpload->processUpload()
#4 /var/www/html/mediawiki-1.24.1/includes/specialpage/SpecialPage.php(363): SpecialUpload->execute(NULL)
#5 /var/www/html/mediawiki-1.24.1/includes/specialpage/SpecialPageFactory.php(584): SpecialPage->run(NULL)
#6 /var/www/html/mediawiki-1.24.1/includes/MediaWiki.php(275): SpecialPageFactory::executePath(Title, RequestContext)
#7 /var/www/html/mediawiki-1.24.1/includes/MediaWiki.php(584): MediaWiki->performRequest()
#8 /var/www/html/mediawiki-1.24.1/includes/MediaWiki.php(435): MediaWiki->main()
#9 /var/www/html/mediawiki-1.24.1/index.php(46): MediaWiki->run()
#10 {main}

Also, this error appears on-screen after the failed upload (with the above debugging options on):

Warning: fopen(/var/www/html/mediawiki-1.24.1/images/lockdir/dmzfox3ljn7ipsdr0zlw44nwle1qlbp.lock): failed to open stream: No such file or directory in /var/www/html/mediawiki-1.24.1/includes/filebackend/lockmanager/FSLockManager.php on line 125

Warning: failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582] in /var/www/html/mediawiki-1.24.1/includes/debug/MWDebug.php on line 302

If you set a debug.log up, this seems to be the relevant tidbit:

[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[warning] failed to mkdir "/var/www/html/mediawiki-1.24.1/images/lockdir" mode 0777 [Called from wfMkdirParents in /var/www/html/mediawiki-1.24.1/includes/GlobalFunctions.php at line 2582]
[exception] [2c79a15b] /index.php/Special:Upload   Exception from line 1871 of /var/www/html/mediawiki-1.24.1/includes/filerepo/file/LocalFile.php: Could not acquire lock for 'Images_(18).jpg.'

So, I think it's a permissions thing in general and maybe an SELinux thing in particular? But I can't figure it out. I've set the images dir chmod -R 777. Any idea what's up here?

If you think it's a SELinux problem, try disabling it and see if upload works.

So, here is what finally fixed it for me:

sudo mkdir /var/www/html/mediawiki-1.24.1/images/temp
chmod -R 777 /var/www/html/mediawiki-1.24.1/images
sudo setsebool -P httpd_unified 1

The last command was suggested by the log dumped to screen when you run

audit2allow -a -w

So I guess it's SELinux. I will try to see if it stick after a reboot. I hope this helps somebody.

This worked for me, thanks!

This also worked for me. I was convince the problem was related to the $wgScriptPath.

Thanks for the tip.

worked for me! tranks

Worked for me too, many thanks!!!