Usually, database drivers don't like fork(), or rather, you should create the database connection after forking.

If you move creating the database connection into your fork loop (or maybe into run_on_start), maybe things start working?

In reply to Re: Can't get multiple Parallel::ForkManager threads connecting to DBD::Pg database by Corion
in thread Can't get multiple Parallel::ForkManager threads connecting to DBD::Pg database by perlygapes

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