DB pool timeout error reproducer

lib/dynflow/executors.rb

@@ -5,19 +5,13 @@ module Executors
     require 'dynflow/executors/parallel'
 
     class << self
-      # Every time we run a code that can be defined outside of Dynflow,
-      # we should wrap it with this method, and we can ensure here to do
-      # necessary cleanup, such as cleaning ActiveRecord connections
       def run_user_code
-        # Here we cover a case where the connection was already checked out from
-        # the pool and had opened transactions. In that case, we should leave the
-        # cleanup to the other runtime unit which opened the transaction. If the
-        # connection was checked out or there are no opened transactions, we can
-        # safely perform the cleanup.
-        no_previously_opened_transactions = active_record_open_transactions.zero?
-        yield
+        # Always acquire a connection from the DB pool, even if it may not be
+        # needed
+        ::ActiveRecord::Base.connection_pool.with_connection do |_conn|
+          yield
+        end
       ensure
-        ::ActiveRecord::Base.clear_active_connections! if no_previously_opened_transactions && active_record_connected?
         ::Logging.mdc.clear if defined? ::Logging
       end