Cache file could not be written on concurrent actions
I get several errors like
The cache file "htdocs/typo3temp/Cache/Data/t3lib_l10n/3e2cbbda0301cf592e5831ef26c56b7b" could not be written.
This happens while a scheduler process is running that imports data using t3lib_TCEmain/DataHandler an I'm trying to work in the backend.
I consider this kind of a race condition that e.g. in this case language caches are flushed too often if a new record gets persisted in the DataHandler.
I can reproduce this on my local machine (Mac OS X) and a staging server with Ubuntu 12.04.