zentralopensource / zentral / 30932896477

90%

Build Type

push

github

Committed by np5

Commit Message

mdm: back off exponentially when polling for an enterprise app install

InstalledApplicationList reschedules itself while an enterprise app install is
pending, but grew the delay linearly and gave up after 10 retries: it stopped
observing the device after ~14 minutes. Any install taking longer than that was
never seen, and the target artifact stayed at AwaitingConfirmation indefinitely
even though the app had installed. Nothing ever revisits it.

Same defect as the one just fixed for ManagedApplicationList, but the schedule is
deliberately its own rather than shared. Enterprise apps are locally hosted
packages rather than App Store downloads, so there is no reason for the two to
move together, and only the install check path retries here at all: this command
also collects the app inventory, which does not reschedule.

The growth factor is 1.35, well below the doubling used for store apps, so the
curve stays dense where the linear one was: every check the previous schedule
made in its first quarter hour still happens at least as early, and 32 retries
then carry the window out to about a week. 33 checks in total, largest gap 1.9d.

Retries are cheap because the chain stops as soon as the app reports installed or
failed, so only an install that never resolves walks the whole schedule.

Both the delay and the retry cap are now named constants instead of inline TODOs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Coverage Stats

6 of 6 new or added lines in 1 file covered. (100.0%)

2 existing lines in 1 file now uncovered.

50041 of 55829 relevant lines covered (89.63%)

0.9 hits per line