PgSQL backend may terminate immediately when connection is lost
The code in pgsql_connection.cc may call exit() under certain conditions. There are couple areas for improvement here:
this was perhaps acceptable behavior when we didn't have any connection failure handling routines, but wasn't that improved in 1.3?
calling exit() explicitly is not acceptable. If we really want to shut down, we should go through a graceful shutdown (unload hooks, close connections, let HA partner know we're going down, etc.)
if somehow there are good justifications why 1 and 2 can be ignored, at the very least we need to print out an error and explain why we are terminating.
On a related note, MySQL also does have DB connection lost handling code and it doesn't call exit.
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