HTTP 500 Internal Server Error indicates a server-side problem preventing request processing. It's one of the most critical errors as it signals a backend malfunction.
Actively monitor your APIs to detect 500 errors before they impact your users.
Symptoms
Signs of 500 errors on an API:
- HTTP 500 code: explicit Internal Server Error response in headers.
- Intermittent errors: some requests succeed, others fail.
- Generic messages: the body often contains a generic error message without details.
Common Causes
Frequent origins of 500 errors:
- Unhandled exception: application code error that isn't caught.
- Failed DB connection: database unreachable or saturated.
- Server configuration: PHP error, file permissions, missing modules.
- Exhausted resources: insufficient memory, timeout exceeded, disk full.
Automate with MoniTao
Detect 500 errors automatically:
- HTTP monitoring: configure an alert on HTTP code >= 500.
- Smart thresholds: alert on N errors in X minutes to avoid false positives.
- Escalation: send SMS if the error persists after 5 minutes.
Frequently Asked Questions
Is an isolated 500 error serious?
An isolated error can be a glitch. Multiple consecutive errors indicate a real problem.
How to distinguish 500 from 502/503?
500 = error in your code. 502 = proxy/load balancer. 503 = service temporarily unavailable.
Where to find error details?
In server logs (error.log) or application logs. Enable debug mode in dev.
Can MoniTao capture the error message?
Yes, you can configure content validation to detect error patterns.
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