Back to All Scenarios
PASSEDqueue / fd_exhaustion
Apache Kafka 3.7 File Descriptor Limit Reached on Debian 12 Bookworm
Apache Kafka 3.7 has exhausted its file descriptor limit. Cannot accept new connections or open new files. Service functionality severely degraded.
Pattern
CONNECTION_REFUSED
Severity
CRITICAL
Confidence
68%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | CONNECTION_REFUSED | CONNECTION_REFUSED | |
| Severity Assessment | HIGH | CRITICAL | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Debian 12 Bookworm. Apache Kafka 3.7 at 23306/23309 file descriptors. Connection leak detected. ulimit -n set to 23309 (default, not tuned for production).
Injected Error Messages (1)
Apache Kafka 3.7 on Debian 12 Bookworm — 23306/23309 FDs used, 'Too many open files', connection refused on new requests, kafka leaking file descriptors at 41/min
Neural Engine Root Cause Analysis
Connection refused — service is likely crashed or not listening on the expected port.
Remediation Plan
Restart the target service. If recurring, check for memory leaks or crash loops.
Improvements Applied
- Severity: CRITICAL (expected HIGH)
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnpydb04kylig7pk4my3un