Check_MK Werk 8557: Alert handling: Fixed repeating error "OSError: [Errno 9] Bad file descriptor"

ID: 8557 Title: Alert handling: Fixed repeating error "OSError: [Errno 9] Bad file descriptor" Component: cmc Level: 2 Class: Bug fix Version: 1.4.0i2 This error occured when a helper was terminated or not really started and persisted until the alert helper was restarted (e.g. with cmk -R) and prevented othr event handlers from working correctly.