sometimes a sosreport isn't found though it's present

[nkshirsagar]

eg case - 00335429

https://files.support.canonical.com/files/customers/foo/00335429/sosreport-juju-a9d6f4-25-lxd-2-00335429-2022-04-27-cchvwkw.tar.xz exists and can be downloaded,

but when athena ran hotsos, we got an empty output,

2022-04-27 00:41 UTC-
-Athena processor: 23af8d3c4d2b subscriber: sosreports has run the following reports.

Summary for report: hotsos - filepath: uploads/sosreport-juju-a9d6f4-25-lxd-2-00335429-2022-04-27-cchvwkw.tar.xz
-------------------------------------------------------------------------
{}


Full hotsos output can be found at: https://files.support.canonical.com/files/customers/athena-reports/sosreport-juju-a9d6f4-25-lxd-2-00335429-2022-04-27-cchvwkw.tar.xz.athena-hotsos.hotsos-full

The full output has just,

ERROR: invalid path or option '/tmp/athena/athena-report-sosreports911261865/00322012_sosreport-sna2r03c010-2021-11-28-ffopvto/'
No full sosreport generated.