Reader studies do not load
- Viewers
Incident Summary
A problem with the grand-challenge backend prevents reader study cases to load in common scenarios for some users.
Friday evening: After an initial analysis of the issue it seems that it is contained to only a few users of the platform. However, for those users it seems to be a persistent problem which needs further investigation. Right now, as evident from the application log files, only developers seem to have observed the problem. Therefore, we lowered the severity from major to minor because it does not seem that users are directly affected at this moment.
Monday: We have fully tracked down the issue to a code change that added an alternative way of counting cases in a reader study. The issue affected users for grand-challenge who:
- are editors of a reader study,
- are readers of that same reader study,
- had saved annotations,
- and were using regular, non-admin accounts.
We reverted the change which resolved the issue. Reader studies are fully operational again.
Timeline
19 June 2025 14:52 | Incident started |
20 June 2025 16:00 | Issue identified |
20 June 2025 18:00 | Severity lowered to minor |
23 June 2025 15:15 | Issue resolved |