[Bug 1973589] Re: Restart loop when using PathExistsGlob

[Nick Rosbrook]

I think this is to be expected since your service just does one thing
and exits immediately -- when the service exists, the PathExistsGlob
condition is still true, and so the service is activated again by
test.path.

If you had a long running service, or another condition to say "we
already ran test.service, no need to run again", you would avoid this.

** Changed in: systemd (Ubuntu)
       Status: Confirmed => Invalid

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Title:
  Restart loop when using PathExistsGlob

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  When using PathExistsGlob in a path unit, systemd starts the
  corresponding service unit in an infinite loop. We have observed this
  problem only under Jammy.

  --------------
  [Unit]
  Description=Test

  [Path]
  PathExistsGlob=/home/www-data/test/*.so
  Unit=test.service

  [Install]
  WantedBy=multi-user.target

  --------------
  [Unit]
  Description=Test

  [Service]
  Type=simple
  ExecStart=echo test
  StartLimitBurst=1000

  [Install]
  WantedBy=multi-user.target

  -------------
  www-data at josi-test-jammy03:~ $ systemctl --user status test.path
  × test.path - Test
       Loaded: loaded (/home/www-data/.config/systemd/user/test.path; disabled; vendor preset: enabled)
       Active: failed (Result: unit-start-limit-hit) since Mon 2022-05-16 17:08:08 CEST; 121ms ago
     Triggers: ● test.service

  May 16 17:08:04 josi-test-jammy03 systemd[24979]: Started Test
  May 16 17:08:08 josi-test-jammy03 systemd[24979]: test.path: Failed with result 'unit-start-limit-hit'.

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