[GitHub] [accumulo] keith-turner commented on pull request #3091: Added code and tests to confirm ScanServers can scan offline tables

[GitBox <gi...@apache.org>]

keith-turner commented on PR #3091:
URL: https://github.com/apache/accumulo/pull/3091#issuecomment-1329783854

   > Regarding this - how would the client know whether the cache contents are correct or not if it doesn't query the metadata table each time to compare the cached data?
   
   Thinking the way it would work is that if a tablet splits and no longer exist, but is still in a clients cache, that it would eventually go to a scan server that would report the tablet does not exists and it would then clear its cache entry for that tablet.  After its cleared it would reload it eventually.   I think this is how caching works w/ tservers.  It stays in the cache until a tserver reports back it does not exists.  I think this was working for scan servers too when they were querying online tables, it would take the same code path when a scan server or tserver reported a tablet no longer existed.


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