item variable not defined loop does not work well with stdout_lines

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The inconsistencies in your indentation lead me to suspect you are withholding evidence. :slight_smile: Assuming your code is this:

<b>- name: check previous kafka broker server.properties
  shell: "ps -ef | grep -i kafka | grep -i server.properties | awk '{print $NF}'"
  register: serverfile
  tags:
    - upgrade
    - upgrade12

- name: debug grepout
  set_fact:
    srvfilepath: "{{ item }}"
  loop: "{{ serverfile.stdout_lines }}"
  when: "'server' in  item"
  tags:
    - upgrade
    - upgrade12

- name: get the interbroker and messge format version details if set
  shell: 'grep -e inter.broker.protocol.version -e log.message.format.version {{srvfilepath}}'
  register: regintbrkpt
  tags:
    - upgrade12

- name: display interbroker version
  debug:
    msg: "{{ item }}"
  loop:
    - "{{regintbrkpt.stdout_lines}}"
  tags:
    - upgrade12</b>

Because the “display interbroker version” task is claiming item is undefined, then the previous task is not registering anything containing stdout_lines. I would not be surprised to find the poorly named “debug grepout” task is not finding ‘server’ in the expected output from the first task, possibly because the shell pipeline isn’t producing what you expect.

Suggestions:

  • Run with -vv until this is working reliably.
  • Insert debug tasks after every task that registers to ensure the data you are passing to subsequent tasks is what you expect.
  • Consider using pgrep -f -a kafka and grep -o with to extract relevant data from existing processes command lines.

Good luck; let us know what you find.