The OP appears to be using MySQL, as in:
$connectionInfo="dbi:mysql:$db;$host";

[download]
but I can't see where the fork or threading is done.

In reply to Re^4: The pain of DBI !!! Lost connection from forked or threaded children by Anonymous Monk
in thread The pain of DBI !!! Lost connection from forked or threaded children by expresspotato

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