Check_MK Werk 4465: Fixed raise condition when mulitple Check_MK helpers updated the ipaddresses.cache file

ID: 4465 Title: Fixed raise condition when mulitple Check_MK helpers updated the ipaddresses.cache file Component: Checks & agents Level: 1 Class: Bug fix Version: 1.5.0i1 Check helpers now lock the ipaddresses.cache file when they want to update an ip address. The locked file is read, updated with the new content and written afterwards. The raise condition happened when multiple check helpers tried to update the file at the same time, hereby removing some recently looked up ip addresses.