TYPO3 Core

Really randomly, I get the following warning and fatal error message:

Warning: require_once(/www/typo3.mda.ch/doc/t3lib/class.t3lib_treeview.php) [function.require-once]: failed to open stream: No such file or directory in /data/opt/apps/typo3_src-4.1/t3lib/class.t3lib_browsetree.php on line 52

Fatal error: require_once() [function.require]: Failed opening required '/www/typo3.xxx.ch/doc/t3lib/class.t3lib_treeview.php' (include_path='.:/usr/share/php:/usr/share/pear') in /data/opt/apps/typo3_src-4.1/t3lib/class.t3lib_browsetree.php on line 52

The file /data/opt/apps/typo3_src-4.1/t3lib/class.t3lib_browsetree.php is there of course. It happens about 1 out of three or four reloads of the page tree. Sometimes this also happens also with frames that also need the browsetree class. This problem happens with all sorts of browsers on all sorts of operating systems.

On the very same server, I am also running a Typo3 4.0 and a 3.8 installation which all do not behave that way and are working perfectly well. These Installations are managed in the same way (souce in /data/opt/apps/typo3SomeVersion/).

Most of the time, I can get the pagetree back with randomly clicking on the Media->File or Media->List Module and than clicking on the page module again. Sometimes, I have to clear the cache in typo3conf/ and do the same again.

Webserver: Apache2
OS of Server: Debian GNU Linux Sarge
PHP Version 5.2.0-0.dotdeb.3

Sometimes the DAM Module shoes a similar error but not as often:

Warning: require_once(/www/typo3.mda.ch/doc/t3lib/class.t3lib_foldertree.php) [function.require-once]: failed to open stream: No such file or directory in /data/www/typo3.mda.ch/doc/typo3conf/ext/dam/components/class.tx_dam_selectionFolder.php on line 67

Fatal error: require_once() [function.require]: Failed opening required '/www/typo3.mda.ch/doc/t3lib/class.t3lib_foldertree.php' (include_path='.:/usr/share/php:/usr/share/pear') in /data/www/typo3.mda.ch/doc/typo3conf/ext/dam/components/class.tx_dam_selectionFolder.php on line 67
(issue imported from #M5319)