[Opensim-dev] Fixing "Unknown User" problems using the database

[Oren Hurvitz]

I started using Hypergrid recently, and came across the "Unknown User"
problem. So far I've seen UserUMMAU4 and UserUMMTGUN9. I poked around to see
if I can do anything about this, and it seems that the mapping of UUID ->
Name is stored in memory only (UserManagementModule.m_UserCache). This has
the following consequences:

1. Simulators don't share what they know.
2. When a simulator is restarted, it forgets even those bindings that it did
know before.

The simulators do attempt to rebuild their cache on startup, by examining
all the prims in the scene. But this is insufficient. E.g., inventory items
also have creators.

I think we should create a table in Robust, similar to UserAccounts (or
perhaps in UserAccounts itself), which stores these name mappings.
Simulators would use this table as a fallback if they don't find a mapping
in their own cache. This will solve all (or at least most) of the "Unknown
User" problems.

What do you think? Am I missing something?

Oren



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