It's the qcamera daemon bug that plagued the Nexus 5--is that your phone? Not sure if it also affected other devices. The most recent updates were supposed to fix it, but some people still report it to be occurring. If you have a Nexus 5, try wiping the cache partition, but be aware that the process can take up to 10 minutes on this particular device: http://forums.androidcentral.com/nexus-5-rooting-roms-hacks/352008-guide-nexus-5-recovery.html