Connection pool: trigger reconnection on fatal errors

boostorg / mysql

MySQL C++ client based on Boost.Asio

Boost Software License 1.0

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Open anarthal opened 4 months ago

anarthal commented 4 months ago

If a pooled connection encounters a fatal error (as per #253), we should trigger a re-connection. Currently:

If the connection gets reset (the default), the error gets detected and re-connection triggers - but we're wasting a server round-trip.
If the connection doesn't get reset (as per return_without_reset), the connection will never be reconnected, which can be problematic.