Don't display "deleted" shards in SHOW SHARDS output #4725
Merged
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If a shard's "owning" shard group has been marked as deleted, the shard is, or soon will be, deleted. So don't list shards that are effectively deleted.
The constant for minimum retention policy was also duplicated in the code, and this was a mistake. This PR also fixes that, setting the constant in one place. It also enhances logging, as requested by @beckettsean
Fixes issue #4709.