Outage in One Signal
Email deliveries are experiencing delays and potential failures
Resolved Major
March 20, 2026 - Started 9 days ago
- Lasted about 3 hours
Incident Report
Summary AI Generated
OneSignal experienced email delivery delays and failures for 3.1 hours due to an unhealthy notifications API instance that caused 27 delivery jobs to become stuck in a terminating state. The incident began with increased lag in email deliveries around 9am and escalated to completely stuck delivery jobs that were not processing. The team identified the root cause, worked to retry the failed deliveries, and restored normal email delivery functionality.
We are still investigating the issue. Around 9am this morning, we noticed an increase in lag on email deliveries. That has now transitioned into stuck delivery jobs that are not processing.
The team is investigating a way to get the delivery jobs to continue, but until then expect potential delays and a potential need to resend emails.
We will provide another update in 30 minutes.
Need to monitor One Signal outages?
- Monitor all your external dependencies in one place
- Get instant alerts when outages are detected
- Be the first to know if service is down
- Show real-time status on private or public status page
- Keep your team informed
Latest Updates ( sorted recent to last )
MONITORING
9 days ago - at 03/20/2026 06:27PM
We have identified a small number of notifications that have been impacted and the delivery jobs have failed. The team is working on retrying those deliveries.
The source of the incident is from one of our notifications api instances became unhealthy, causing 27 jobs to remain in a terminating state, and thus they were not able to retry.
The incident status is being updated to monitoring, and any new deliveries going out should succeed.
INVESTIGATING
9 days ago - at 03/20/2026 06:07PM
The investigation is still ongoing. So far we have 27 delivery jobs that we know are stuck, but we are still still determining the scope of the delays.
INVESTIGATING
9 days ago - at 03/20/2026 05:25PM
We are still investigating the issue. Around 9am this morning, we noticed an increase in lag on email deliveries. That has now transitioned into stuck delivery jobs that are not processing.
The team is investigating a way to get the delivery jobs to continue, but until then expect potential delays and a potential need to resend emails.
We will provide another update in 30 minutes.
Latest One Signal outages
Data feeds - Processing delays - 16 days ago
Some apps may have experienced - about 1 month ago
Email & Scheduled Messages - Degraded Performance - about 1 month ago
Message Delivery - Delayed Message Processing - about 1 month ago
The Status Page Aggregator with Early Outage Detection
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6020 services available
Integrations with
