CheckForOctopusUpgrade.IsLinux fails with NullReferenceException

[NickJosevski]

The bug

Server reports errors in Diagnostics, CheckForOctopusUpgrade.IsLinux fails with NullReferenceException

Screen capture

Log exerpt

Failed checking for updates System.NullReferenceException: Object reference not set to an instance of an object.
   at Octopus.Server.Schedules.CheckForOctopusUpgrades.IsLinux(Machine machine) in C:\buildAgent\work\abb2fbfce959a439\source\Octopus.Server\Schedules\CheckForOctopusUpgrades.cs:line 294
   at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source, Func`2 predicate)
   at Octopus.Server.Schedules.CheckForOctopusUpgrades.AddSpaceMetrics(IOctopusQueryExecutor allPartitionsAsUserWithAllPermissions, Dictionary`2 jsonBuilder, String spaceId) in C:\buildAgent\work\abb2fbfce959a439\source\Octopus.Server\Schedules\CheckForOctopusUpgrades.cs:line 308
   at Octopus.Server.Schedules.CheckForOctopusUpgrades.BuildRequestPayload() in C:\buildAgent\work\abb2fbfce959a439\source\Octopus.Server\Schedules\CheckForOctopusUpgrades.cs:line 272
   at Octopus.Server.Schedules.CheckForOctopusUpgrades.CheckForUpdates() in C:\buildAgent\work\abb2fbfce959a439\source\Octopus.Server\Schedules\CheckForOctopusUpgrades.cs:line 207

Affected versions

Octopus Server: 2019.8.3, 2019.8.4

Workarounds

Wait for 2019.8.5

Links

None

[NickJosevski]

Release note: fix for NullReferenceException in CheckForOctopusUpgrade reported in server dignostic errors

[lock]

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