Need an iRule for monitoring the pool health or active member status ---URGENT

Will it select the pool member despite of priority groups in place because the member that I need to choose is in the lowest priority amongst the other ones.

i understand there is no issue because you are using node command.

e.g.

when CLIENT_ACCEPTED {
  if { [llength [active_members -list db_pool]] < 1 } {
    node app_pool_member_3
  } else {
    pool app_pool
  }
}