capistrant opened a new issue, #13322:
URL: https://github.com/apache/druid/issues/13322

   ### Affected Version
   
   0.23.X (likely exists in all prior releases, but I haven't validated)
   
   ### Description
   
   Nothing stops me from creating a groupMapping with an arbitrary and always 
invalid groupPattern, such as - `fajfkdjaf`. The `POST` to create the pattern 
will work just fine. However, the `LDAP` authorizer is now broken at this 
point. `LDAPRoleProvider#getRoles` will throw a `RuntimeException`. And worse 
yet, I cannot correct my mistake by executing `DELETE` on the groupMapping. 
Doing so just says the mapping doesn't exist. This leaves me with the option of 
doing manual surgery on the metastore entry for the groupMappings, or using a 
sledgehammer and just deleting the row in the druid_config table and 
re-building my mappings (both very unfriendly to the operator and cluster 
users).
   
   ### Fix Ideas
   
   #### operator specified groupPattern regex
   
   Allow the operator to specify a regex for the authorizer that restricts what 
kinds of groupPatterns can be used. This can help prevent us from getting to 
this point in the first place.
   
   #### less punitive behavior in `LDAPRoleProvider#getRoles` 
   
   I think it makes much more sense to log and skip a mapping that results in 
an `InvalidNameException`. Completely breaking the authorizer over what was 
likely a mistake by the operator seems like an unnecessary reaction to the 
problem that will cause the cluster to be degraded or down depending on who is 
using the authorizer (internal user or just clients, etc.)


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