Fix poller to maintain previous blocklist results on tenant error #3860
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What this PR does:
Here we fix a bug where a single tenant experiences an error during polling,
which is not enough to trip the max error threshold. In this case, the tenant
which experienced the error would be removed from the blocklist, and would not
be re-added until the next time the poller runs. Inconsistent results in the
blocklist can cause issues on the query path for this tenant.
Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.md
updated - the order of entries should be[CHANGE]
,[FEATURE]
,[ENHANCEMENT]
,[BUGFIX]