[Bug 1999816] Re: Failure to get free disk space breaks "rabbitmqctl status" command

[Edward Hope-Morley]

** Also affects: rabbitmq-server (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: rabbitmq-server (Ubuntu Focal)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1999816

Title:
  Failure to get free disk space breaks "rabbitmqctl status" command

Status in rabbitmq-server package in Ubuntu:
  In Progress
Status in rabbitmq-server source package in Focal:
  New
Status in rabbitmq-server source package in Jammy:
  New

Bug description:
  When for some reason the df command fails to get the disk free space
  (for example timeout on a heavily loaded system) the result is a
  harcoded value of "unknown". As this is not a valid number this
  generates arithmetic errors when the "rabbitmqctl status" command is
  run and tries to divide that value to convert it to another unit.

  This has been fixed upstream here: 
  https://github.com/rabbitmq/rabbitmq-server/pull/4897

  [Test Plan]
  The df command can be linked to another file that just waits for a few minutes to force a timeout (I tested with 5 minutes). After the timeout occurs the "rabbitmqctl status" returns an error with the unpatched version. After the patch it shows all the information and displays unknown in the free space line.

  [Where problems could occur]
  The patch just changes the display of information, it should not break anything in the core operations of the package

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