task not running further after "Failed to connect to the host via ssh"

hello,
I am running task on multiple nodes and task fails, when any one of the node is unreachable.

Any idea, how to overcome it.

here is my Ansible Script.

  • hosts:
  • all
    name: Search APPID
    gather_facts: false
    serial: 1
    become: no
    any_errors_fatal: false

tasks:

  • set_fact: env_var=“{{ lookup(‘env’,‘HOME’) }}”

  • command: python “{{env_var}}/script/searchapp.py”
    register: ps

  • debug: var=ps

  • hosts:

  • localhost
    name: Merge APPID
    gather_facts: false
    serial: 1
    become: no

I am using ansible 2.1.0.0