DataTalksClub / DataTalksClub/course-management-platform
[ALERT] cmp-prod-alb-target-5xx
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 85
- Forks
- 37
- PR merge metrics
- No merged PRs in 30d
Description
This issue was opened automatically from a CloudWatch alarm notification.
Alarm
| Field | Value |
|---|---|
| Name | cmp-prod-alb-target-5xx |
| State | ALARM |
| Changed at | 2026-08-31T14:52:54.040+0000 |
| Description | ALB target 5xx responses for CMP prod. |
| Reason | Threshold Crossed: 1 datapoint [1.0 (31/08/26 14:45:00)] was greater than or equal to the threshold (1.0). |
| AWS account | 387546586013 |
| Region | eu-west-1 |
Metric
| Field | Value |
|---|---|
| Namespace | AWS/ApplicationELB |
| Metric | HTTPCode_Target_5XX_Count |
| Dimensions | TargetGroup=targetgroup/course-management-prod/164455bdbcc646d8, LoadBalancer=app/course-management-shared/bd279e4cc4f97601 |
| Statistic | SUM |
| Period | 300 seconds |
| Evaluation periods | 1 |
| Threshold | GreaterThanOrEqualToThreshold 1.0 |
Investigation
- Check application and load-balancer logs around the state-change time.
- Check the current service version at
/api/health/. - Record the cause and resolution here before closing the issue.
Application logs
| Field | Value |
|---|---|
| Log group | /ecs/course-management-prod |
| Suggested window | 2026-08-31T14:42:54.040000+00:00 to 2026-08-31T14:57:54.040000+00:00 |
| Investigator role | arn:aws:iam::387546586013:role/cmp-alert-investigator |
Open CloudWatch Logs Insights, select /ecs/course-management-prod, or use the
cmp-alert-investigator AWS CLI profile described in the infrastructure README:
aws --profile cmp-alert-investigator logs filter-log-events \
--region eu-west-1 \
--log-group-name /ecs/course-management-prod \
--start-time 1788187374040 \
--end-time 1788188274040 \
--limit 100
Review log output for sensitive information before copying any excerpt into
this public issue.
Raw CloudWatch notification
{
"AWSAccountId": "387546586013",
"ActionExecutedAfterMuteWindow": false,
"AlarmActions": [
"arn:aws:sns:eu-west-1:387546586013:course-management-operator-alerts"
],
"AlarmArn": "arn:aws:cloudwatch:eu-west-1:387546586013:alarm:cmp-prod-alb-target-5xx",
"AlarmConfigurationUpdatedTimestamp": "2026-07-08T22:06:44.752+0000",
"AlarmDescription": "ALB target 5xx responses for CMP prod.",
"AlarmName": "cmp-prod-alb-target-5xx",
"InsufficientDataActions": [],
"NewStateReason": "Threshold Crossed: 1 datapoint [1.0 (31/08/26 14:45:00)] was greater than or equal to the threshold (1.0).",
"NewStateValue": "ALARM",
"OKActions": [],
"OldStateValue": "OK",
"Region": "EU (Ireland)",
"StateChangeTime": "2026-08-31T14:52:54.040+0000",
"Trigger": {
"ComparisonOperator": "GreaterThanOrEqualToThreshold",
"Dimensions": [
{
"name": "TargetGroup",
"value": "targetgroup/course-management-prod/164455bdbcc646d8"
},
{
"name": "LoadBalancer",
"value": "app/course-management-shared/bd279e4cc4f97601"
}
],
"EvaluateLowSampleCountPercentile": "",
"EvaluationPeriods": 1,
"MetricName": "HTTPCode_Target_5XX_Count",
"Namespace": "AWS/ApplicationELB",
"Period": 300,
"Statistic": "SUM",
"StatisticType": "Statistic",
"Threshold": 1.0,
"TreatMissingData": "notBreaching",
"Unit": null
}
}
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the application and load-balancer logs for the suggested window, using the cmp-alert-investigator AWS CLI profile described in the infrastructure README. Check the current service version at /api/health/ and review the CloudWatch output for sensitive information. Done means the cause and resolution are recorded here before closing the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- aws, python
- Domain
- backend, cloud, observability
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100