Commits on Aug 11, 2022

1. proxycfg: terminate stream on irrecoverable errors …

   This is the OSS portion of enterprise PR 2339.
   
   It improves our handling of "irrecoverable" errors in proxycfg data sources.
   
   The canonical example of this is what happens when the ACL token presented by
   Envoy is deleted/revoked. Previously, the stream would get "stuck" until the
   xDS server re-checked the token (after 5 minutes) and terminated the stream.
   
   Materializers would also sit burning resources retrying something that could
   never succeed.
   
   Now, it is possible for data sources to mark errors as "terminal" which causes
   the xDS stream to be closed immediately. Similarly, the submatview.Store will
   evict materializers when it observes they have encountered such an error.

   

   boxofrad committed Aug 11, 2022
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