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• If there are any two log directories with the same UUID, the broker will fail at startup
• If there are any meta.properties file is  files missing directory.id a , a new UUID is generated, and assigned to that log directory by updating the file
• If there are no offline log directories the broker will also create or amend the directory.ids field in each meta.properties file as required
• If there are offline log directories, the broker will fail at startup if
  • There is a mismatch between the number of entries in log.dirs  and directory.ids 
  • There is a mismatch between any two directory.ids 
  • If the directory.ids  field is missing in any of the meta.properties  files.

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