[tribe29/checkmk] 0b3cc3: 13431 FIX Fix async checks blocked by realtime checks - Checkmk git commits

4 Oct 2022

  Branch: refs/heads/master
  Home:   https://github.com/tribe29/checkmk
  Commit: 0b3cc306df6745024c8da9e79ae1d389f46c0a56
      https://github.com/tribe29/checkmk/commit/0b3cc306df6745024c8da9e79ae1d389f…
  Author: Benedikt Seidl &lt;benedikt.seidl(a)tribe29.com&gt;
  Date:   2022-10-04 (Tue, 04 Oct 2022)

  Changed paths:
    A .werks/13431
    M agents/check_mk_agent.linux

  Log Message:
  -----------
  13431 FIX Fix async checks blocked by realtime checks

When realtime checks were configured, async checks were not executed.

The problem (and the fix) can be reproduced by the following test script:

  fork_away() {
    echo "start" >> /tmp/testing
    date >> /tmp/testing
    sleep 2
    date >> /tmp/testing
    echo "end" >> /tmp/testing
  }

  main_1_fine() {
    fork_away &
  }

  main_2_broken() {
    (
    fork_away &
    ) | cat
  }

  main_3_fine() {
    (
    fork_away > /dev/null &
    ) | cat
  }

  main_4_broken() {
    (
    true && fork_away > /dev/null &
    ) | cat
  }

  main_5_fine() {
    (
    { true && fork_away; } > /dev/null &
    ) | cat
  }

  main_6_fine() {
    (
    true && { fork_away > /dev/null & }
    ) | cat
  }

  main() {
    # uncomment the one you want to test
    # the bash script is expected to exit immediately
    # a log line should be printed in /tmp/log after the script finished.
    # main_1_fine
    # main_2_broken
    # main_3_fine
    # main_4_broken
    # main_5_fine
    # main_6_fine
    echo "done!"
  }

  main

Change-Id: I2c4be030bbd0768d39c6e8f6ac88d2ac36bdff41