Resolved after 10 hours 58 minutes, affecting Piano Data Collection - Crawler, on December 2, 2025.
RCA report for the incident can be found at [**this link**](https://docs.piano.io/wp-content/uploads/2025/12/2025-12-02-RCA-Piano-Content_-Crawling-delay.pdf).
Affected components
Update timeline
- identified Dec 02, 2025, 09:02 AM UTC
We are currently experiencing an incident where newly published articles are not crawled immediately due to an accumulated event lag. Our engineers identified the issue and promptly applied a fix. The system is clearing the processing backlog, and normal crawling should resume within a few hours.
- monitoring Dec 02, 2025, 01:02 PM UTC
Crawler processing is now functioning normally. However, we are still observing an approximate 4-hour delay. We are closely monitoring the situation and will update once the lag has been fully resolved.
- resolved Dec 02, 2025, 08:01 PM UTC
The issue has been resolved, and crawling services are operating normally.
- postmortem Dec 09, 2025, 07:27 AM UTC
RCA report for the incident can be found at [**this link**](https://docs.piano.io/wp-content/uploads/2025/12/2025-12-02-RCA-Piano-Content_-Crawling-delay.pdf).
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