Find out specific files in sub directories using Ansible Playbook

See my coments marked with #

Playbook1

- hosts: YOURHOST1
  remote_user: "YOURUSER"
  become: True

  tasks:

  #Instead using shell, use find module... It will check if there are 10 files created before 1 minute in folder, otherwise playbook fails
  - name: Check all files
    find: paths=/var/lib/jenkins/jobs/processdata/workspace/files
          file_type=file
          age=-1m
          age_stamp=mtime
    register: files
    failed_when: files.matched < 10

  - name: Number of files
    debug: msg="Total files {{ files.matched }}"

  #Check for SUCCESS file, I didn't add an action to delete SUCCESS file... Hope you have any other script to do it
  - name: Check Success File
    find: paths=/var/lib/jenkins/jobs/processdata/workspace/files
          file_type=file
          patterns=SUCCESS
    register: success_file
    failed_when: success_file.matched < 1

  - name: Success file
    debug: msg='Success file is {{ success_file.files.0.path }}'

  - name: Remove previous tarFile
    file: path=/tmp/process.tar.gz
          state=absent

  #I've found a way to make it work
  - name: compress all the files in tar.gz
    archive: path="{{ files_to_archive }}"
             dest=/tmp/test.tar.gz
             format=gz
    vars:
        files_to_archive: "{{ files.files | map(attribute='path') | list }}"

- include: PLAYBOOK2.yml 

Playbook2 If one of the previous actions fails, Ansible stops and won't run any other action.

- hosts: YOURHOST2
  remote_user: "YOURUSER"
  become: True

  tasks:

  - name: creates directory
    file: path=/data/taks/files/
          state=directory

  - name: Copy tar file
    copy: src=/tmp/test.tar.gz
          dest=/tmp/process.tar.gz
          owner=root
          group=root
          mode=0744

  - name: copy and untar process.tar.gz file
    unarchive: src=/tmp/process.tar.gz
               dest=/data/taks/files/

  - name: Remove SUCCESS File
    file: path=/data/taks/files/SUCCESS
          state=absent

#I don't know why you'll need this:
  - name: sleep for few seconds
    pause: seconds=20

Please consider that one of the features of ansible is idempotency, you should write your scripts to run and continue from previous actions (if they have failed in a previous launch). Neither yours nor mine scripts are idempotent, because you need to find files newer than a minute before, hence during next launch (if something fails) your script discards files older than a minute.

Same happens with SUCCESS file, if you have a platform/script that is continue deleting it, is possible that Ansible script fails when running.

Your playbook is syntactically wrong. fetch is an module and needs to be called in its own task.

Also there is not too much sense in looping and writing in the same file. Probably you want to include {{ item }} in the dest parameter as well.

This should do the trick:

- name: 'register files'
  shell: "ls /tmp/test_Prereq_*"
  register: path_files
- name: fetch
  fetch:
    src: '/tmp/"{{ item }}"'
    dest: '/home/vj/testout-{{ item }}'
  with_items: '{{ path_files.stdout }}'