Update poolboy.md (#2538)
Update poolboy.md (#2538)

* Update poolboy.md

Catching an exception thrown by GenServer.call in the transaction function. If we don't do this, a timeout de-commisions that specific worker and pretty soon the system stops responding since no workers are around

* Update poolboy.md
doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school