Immediately release invalid connections in getValidManaged
#7218
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Fixes #7216.
Previously, if an invalid connection was obtained from the pool, instead of returning it back to the pool so that it could dispose/recycle it, we would continue
flatMap
ping resources until we could obtain a valid connection. Thus we'd retain leases to the invalid connections much longer than necessary, which is problematic when the pool itself has a limited number of slots.By using a
Hotswap
we can release the invalid connection immediately before attempting to obtain a new one.