CI-915 Progress Dialog State Loss Fix - #3881
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[AI] Guarded the progress dialog transaction against state loss so a login progress update delivered while the activity is stopped no longer crashes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
📝 WalkthroughWalkthrough
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to The change defers progress-dialog updates while fragments are paused, but an older pending request can currently replace a newer dialog after resume, showing stale progress to users. Merge should wait for the pending-request ordering issue to be corrected and for the test to verify the requested task. Sequence Diagram(s)sequenceDiagram
participant LoginActivity
participant CommCareActivity
participant ProgressDialogFragment
LoginActivity->>CommCareActivity: request progress dialog
CommCareActivity->>CommCareActivity: defer task id while fragments are paused
LoginActivity->>CommCareActivity: resume and synchronize fragments
CommCareActivity->>ProgressDialogFragment: show pending dialog
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description covers the product impact, technical changes, ticket references, safety story, and automated test coverage. The Labels and Review checklist is not included, but the description is otherwise substantially complete.
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🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Inline comments:
In `@app/src/org/commcare/activities/CommCareActivity.java`:
- Around line 394-408: The pending dialog flow involving
showPendingProgressDialog and startBlockingForTask must preserve the newest
request order: when startBlockingForTask(B) supersedes a stored request A,
either replace the pending request with B or clear taskIdForPendingShow so stale
A cannot dismiss and replace B during onResumeFragments().
In
`@app/unit-tests/src/org/commcare/android/tests/activities/LoginProgressDialogStateLossTest.kt`:
- Line 59: Strengthen the assertion in LoginProgressDialogStateLossTest by
verifying that currentProgressDialog.taskId equals
DataPullTask.DATA_PULL_TASK_ID, rather than only asserting the dialog is
non-null.
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app/src/org/commcare/activities/CommCareActivity.javaapp/unit-tests/src/org/commcare/android/tests/activities/LoginProgressDialogStateLossTest.kt
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The login engine connects its tasks to HeadlessTaskConnector, whose connectTask is a no-op, so nothing is ever registered with the activity's TaskConnectorViewModel and the inherited cancelCurrentTask() had no task to cancel. Pressing STOP disabled the button and left the dialog stuck on "Cancelling..." indefinitely. Before 2.64 both login tasks were connected to the activity, so cancellation worked. LoginActivity now retains the Job returned by LoginController.start and cancels that instead, falling through to super when no login is running so the staged-update task on the same screen still cancels the usual way. Cancellation also calls tryAbort() alongside cancel(), mirroring TaskConnectorViewModel.cancelTask. Without it the restore's HTTP request kept streaming after the user asked for it to stop.
Two refinements to the areFragmentsPaused guard: A dismissal aimed at a show that was post-poned and never committed no longer clears the pending dismissal owed to the dialog that is actually added. That mattered for the ticket's own scenario: a backgrounded login on Android 12+ is expected to fail at startForegroundService, so dismiss(DATA_PULL) -> show(KEY_EXCHANGE) -> dismiss(KEY_EXCHANGE) is the common path, and it left the sync dialog stranded on screen with nothing to dismiss it on resume. A blanket dismissal still falls through, since the added dialog has to be dealt with either way. showPendingProgressDialog is documented, since the reason it runs after the pending dismissal, and the reason a same-task dialog is left alone rather than rebuilt, are both easy to undo by accident. Tests: LoginProgressDialogStateLossTest's two cases are folded into LoginProgressDialogLifecycleTest, which covers the same two plus the sync -> signing-in swap, a login finishing while backgrounded, a blanket dismissal, a same-task show keeping its dialog instance, and the STOP button. Verified as real pins: with the production changes reverted the four dialog cases fail with the production IllegalStateException. ReflectionUtils is brought over from master unchanged so the test can reach private activity state; keeping the same path and content there means the eventual forward-merge sees an identical file rather than a conflict.
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Picking this up from @conroy-ricketts: I pushed two commits, one hardening the deferred show and one fixing the STOP button. I also updated the PR description with details about the additional fixes. |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## commcare_2.64 #3881 +/- ##
===================================================
+ Coverage 27.95% 28.30% +0.35%
- Complexity 4886 4954 +68
===================================================
Files 989 990 +1
Lines 59059 59119 +60
Branches 7041 7046 +5
===================================================
+ Hits 16512 16736 +224
+ Misses 40558 40372 -186
- Partials 1989 2011 +22 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Super-linter picks its file set with a two-dot diff against DEFAULT_BRANCH, which was hardcoded to master. For a PR based on a release branch that means the file set is the whole master-to-release-branch divergence rather than the files the PR touches: PR #3881 changes 4 Kotlin files but got 144 linted, including master-only files that don't exist on the branch and are logged as "exists in commit data, but not found on file system, skipping...". The result is that every PR based on commcare_2.64 fails the Kotlin lint job on pre-existing violations it did not introduce and cannot fix in scope. #3880 and #3877 both fail it, with passing Builds. Pointing DEFAULT_BRANCH at github.base_ref makes the diff base the branch the PR actually targets. No change for PRs into master, where base_ref is master.
startBlockingForTask now clears taskIdForPendingShow when it defers, so a connected task's request supersedes an earlier direct showProgressDialog rather than losing the resume to it. Reachable only when a dismissal is also queued: that skips the blocking branch, which would otherwise have cleared the postponed show on its way past via dismissCurrentProgressDialog. The newer request still waits for a later onResumeFragments, because the else-if in syncTaskBlockingWithDialogFragment leaves triedBlockingWhilePaused set. That is pre-existing and not touched here. Also fixes the test helper: ActivityController.resume() already dispatches onResumeFragments, so calling postResume() as well dispatched it twice and hid ordering bugs between the two deferral slots. The comment claiming postResume was required was wrong. All cases still pass under one dispatch. Includes comment trims from review.
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The changes look good for the current requirement of showing the pending dialog. However, the logic is a bit complex and hard to follow because of how these cases are handled:
Do #1 and #2 overlap? Both seem to handle displaying the blocked dialog when the fragment is paused. If that's the case, I think we can simplify this further. |
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Requesting changes in PR structure before we proceed to review -
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Noting that I think this was a rather complex bug with a mixture of regressions, issues related to changing Android requirements, and even issues related to the Github CI builder. That being said:
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@OrangeAndGreen thanks, the new state looks great to me. Question on PR -
Are these both regressions of 2.64 vs existing bugs ? Also,
Does that mean the after fix video in PR description is on a device < Android 12 ? |
Correct, my understanding is that both of these were introduced by the login refactoring done for 2.64.
The video shows a device running Android 14. The crash is timing dependent (app has to go to background at the right moment in the process) and I haven't been able to reproduce it, but since it isn't the focus of this ticket anyway I figured the important thing is showing the crash went away. I updated the PR description to indicate that the Android 12+ issue is intermittent. |
Do we know how it was working pre-2.64 given we never had the code around |
Agreed that this could be cleaned up more although I think it may be worth keeping out of this ticket to keep it simpler for the hotfix. There is some overlap but the two variables are used from different places and currently the overlap doesn't hurt anything (thanks to a no-op in showProgressDialogIfNeeded). |
Yes, the issue was avoided before since LoginActivity was stopped while in background and therefore never made the call to showProgressDialog. The "headless login engine" work moved the login process from a CommCareTask in the Activity to its own standalone process, making it possible to call showProgressDialog on a stopped Activity (causing the IllegalStateException). |
Think a simpler localized and hot-fix appropriate fix in that case may just be to do something like - Do you have thoughts on implementing one vs the other here ? Also I am noticing wierd rotational behaviour on master and even with this change that I am not seeing on 2.63, If you rotate the device while the sync progress dialog is in progress, the progress dialog gets stuck mid way indefinitely. |
shubham1g5
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Nothing blocking on my side, but left an alternative suggestion which seems like would have lower blast radius.
Yeah, agreed that could address the issue also and with a smaller change, although adding the guard in CommCareActivity is in line with the other dialog-related functions in that class so seems like a consistent route to take instead of introducing a new mechanism. I'm open to going the other route though if you'd prefer the simpler change. Claude is flagging an additional risk there though where the dialog could be lost (while the sync continues) if the user sends the app to background at the right moment, so sounds like we'd want to add a little extra code to remember the pending phase and later re-show the dialog in
Ah, yup, I'm seeing it too. This is another fallout from moving the login pipeline from a Noting that changing the approach in the first point above won't have any effect on the second point. |
Yeah, think we should plan to add it to the hotfix scope and fix as part of this or another PR (not sure how overlapping the 2 changes are)
I am slightly inclined towards it given the simpler change only affects the login and not other tasks happening on top of CommCareActivity, mostly thinking it would be simpler to ask QA to test all login dialog states in comparison to all progress dialog states. I agree this PR is a better change overall though that we may want to reserve for |
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@shubham1g5 Here's my latest takeaway given the various possibilities: Looking at a possible middle ground, we could do the local guard in LoginActivity as you suggested, but then also add a temporary configChanges line to the manifest for LoginActivity preventing the activity from being destroyed and recreated on lifecycle events like screen rotation, i.e.: Then before the next release we can restore the fix as it currently is here (with guard in CommCareActivity instead) while refactoring the login pipeline to viewModelScope. It's a bit of a short-term long-term trade-off and I'm not sure if the manifest change is acceptable in the meantime... |
Definitely agree here, I didn't realise you are talking about abstracting a lot of code and just assumed that it would be abstracting the state that's breaking during rotation.
Definitely an option although CommCare philosophy has been very against restricting rotation in past and I don't feel like I am in place to make that decision specially without considering alternatives. I would be surprised if there is no alternative path to this problem, but to understand it more, are you able to provide more details around the state that's getting lost in rotation and if it's not possible to abstract only that state in a view model or by using any other approaches to preserving screen rotation, To highlight, we were not using view-model before as well on LoginActivity, so it should be possible to preserve state without using a view model as well here. |
I'll look into the other points in your latest comment but just want to point out that the proposed manifest change ( |
Super-linter picks its file set with a two-dot diff against DEFAULT_BRANCH, which was hardcoded to master. For a PR based on a release branch that means the file set is the whole master-to-release-branch divergence rather than the files the PR touches: PR #3881 changes 4 Kotlin files but got 144 linted, including master-only files that don't exist on the branch and are logged as "exists in commit data, but not found on file system, skipping...". The result is that every PR based on commcare_2.64 fails the Kotlin lint job on pre-existing violations it did not introduce and cannot fix in scope. #3880 and #3877 both fail it, with passing Builds. Pointing DEFAULT_BRANCH at github.base_ref makes the diff base the branch the PR actually targets. No change for PRs into master, where base_ref is master.
Ah, I think that's incorrect, I'm looking more into the idea of creating a smaller LoginViewModel that can preserve just what we need with the login task, that may be the best way to go. |
The login pipeline ran on LoginActivity's lifecycleScope, which is cancelled at onDestroy. Rotating mid-login therefore tore it down: SyncOperations cancels DataPullTask when its continuation is cancelled, so the restore was aborted part-way, no result was ever delivered, and the progress dialog was left up for a login that was no longer running. Pre-2.64 this was handled by the task-connector framework - DataPullTask was held in TaskConnectorViewModel and re-attached to the recreated activity. The headless login engine opted out of that (HeadlessTaskConnector.connectTask is a no-op), so restore an equivalent: LoginViewModel owns the job in viewModelScope, which survives configuration changes and is cancelled only when the activity genuinely finishes. Progress and result are exposed as LiveData so the recreated activity re-subscribes instead of being handed callbacks bound to the destroyed instance. Replaying progress is what rebuilds the dialog after a rotation; currentLoginPhase deliberately stays on the activity, because it is the phase-vs-null mismatch on a fresh instance that triggers the re-show. The result is single-use so a rotation after login completes does not hand the same outcome to the next activity. LoginController.start() existed only to bridge into lifecycleScope and had a single caller, so it is removed rather than adapted; the ViewModel calls performLogin directly, as ConnectAppLauncher already does. Passing the application context also drops the activity reference the pipeline's collaborators used to hold for its whole duration. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Okay, I decided to do the additional view model work on a different PR chained to this one since it seems separate enough in focus. The quick summary here is that I created a LoginViewModel that holds the login Job as well as LiveData objects for the progress and result. See the description in that PR for more. Note that now updateLoginProgressUi gets called from the Activity's view model observer. |
The rotation and STOP tests reached into LoginViewModel to start a login, plant a job and read one back. Everything the tests actually care about is observable from the screen, so drive it that way: type credentials, press LOGIN, press STOP, rotate. The only remaining seam is the login work itself, which would otherwise talk to the server; the fake now also reports how many pipelines have started, are running and were cancelled, which is what the assertions read instead of the view model's private job. "a consumed result is not redelivered after rotation" now pins the user-visible consequence: a successful login closes the screen, so a replayed result would close the recreated one too. ReflectionUtils.writeField has no callers left, so drop it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
CI-915 Keep The Login Pipeline Alive Across Rotation
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Not a blocker for me since background show/dismiss cases look covered. Let's just make sure QA gives this edge case a proper regression pass before release. |
…ess-dialog-state-loss-fix # Conflicts: # .github/workflows/linter.yml # RELEASES.md
…s-fix' into CI-915-progress-dialog-state-loss-fix
4 participants
CI-915
Product Description
Fixes a background crash if the user sends the phone to background during the sync while logging into a traditional CommCare app.
Before:
Note that this needed to be recorded from a second device because recording a video directly on the device while testing modified timing enough to prevent me from reproducing the crash.
PXL_20260826_152729243.TS.mp4
After the fix (no crash when re-opening the app after sync completes):
PXL_20260826_153734882.TS.mp4
Technical Summary
areFragmentsPausedcheck toCommCareActivity.showProgressDialog()(fixes the initial crash)Important notes:
Safety story
Automated test coverage