The `IndexDisabledException` can prevent SC from starting in maintenance mode

[ramonsmits]

A customer got an IndexDisabledException at the following location which prevented SC from starting.

at ServiceControl.Infrastructure.RavenDB.RavenBootstrapper.PurgeKnownEndpointsWithTemporaryIdsThatAreDuplicate(IDocumentStore documentStore) in C:\BuildAgent\work\7189a56f9f44affc\src\ServiceControl\Infrastructure\RavenDB\RavenBootstrapper.cs:line 103
at ServiceControl.Infrastructure.RavenDB.RavenBootstrapper.StartRaven(EmbeddableDocumentStore documentStore, Settings settings, MarkerFileService markerFileService, Boolean maintenanceMode) in C:\BuildAgent\work\7189a56f9f44affc\src\ServiceControl\Infrastructure\RavenDB\RavenBootstrapper.cs:line 97
at Particular.ServiceControl.MaintenanceBootstrapper.Run(HostArguments args) in C:\BuildAgent\work\7189a56f9f44affc\src\ServiceControl\MaintenanceBootstrapper.cs:line 20

The PurgeKnownEndpointsWithTemporaryIdsThatAreDuplicate method could fail but that should not prevent maintenance mode from launching.

Workaround

Removing the Indexes folder will ensure that maintenance mode can be launched again. It is advised to run to scan for DB consistency by running esentutl /r RVN /l logs /s system in the DB folder.

[WilliamBZA]

Fixed in #2243, released in 4.13.2.