Error in kaltura_api_v3.log

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Joined: 06/28/2011
Points: 8

Hello

I was scouting around the other day at logs on my Debian 6.0 KalturaCE 4.0 setup and i noticed this error in the kaltura_api_v3.log every 15 seconds. Any ideas on what is causing it?

2011-11-11 04:30:05 [127.0.0.1] [1630642505] [API] [KalturaFrontController->errorHandler] WARN: /opt/kaltura/app/alpha/lib/kPluginableEnumsManager.php line 71 - file_put_contents(/opt/kaltura/app/alpha/config/../../cache//ApiPluginableEnums.cache): failed to open stream: Permission denied
2011-11-11 04:30:05 [127.0.0.1] [1630642505] [API] [KalturaFrontController->errorHandler] WARN: /opt/kaltura/app/alpha/lib/kPluginableEnumsManager.php line 47 - file_put_contents(/opt/kaltura/app/alpha/config/../../cache//CorePluginableEnums.cache): failed to open stream: Permission denied
2011-11-11 04:30:21 [127.0.0.1] [536794413] [API] [KalturaFrontController->errorHandler] WARN: /opt/kaltura/app/alpha/lib/kPluginableEnumsManager.php line 71 - file_put_contents(/opt/kaltura/app/alpha/config/../../cache//ApiPluginableEnums.cache): failed to open stream: Permission denied
2011-11-11 04:30:21 [127.0.0.1] [536794413] [API] [KalturaFrontController->errorHandler] WARN: /opt/kaltura/app/alpha/lib/kPluginableEnumsManager.php line 47 - file_put_contents(/opt/kaltura/app/alpha/config/../../cache//CorePluginableEnums.cache): failed to open stream: Permission denied