🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: SUSE Linux Enterprise Server 15

📖 ~1 min read

Table of contents
  1. Symptom & Impact
  2. Environment & Reproduction
  3. Root Cause Analysis
  4. Quick Triage
  5. Step-by-Step Diagnosis
  6. Solution – Primary Fix
  7. Solution – Alternative Approaches
  8. Verification & Acceptance Criteria
  9. Rollback Plan
  10. Prevention & Hardening
  11. Related Errors & Cross-Refs
  12. References & Further Reading

Symptom & Impact

A unit repeatedly enters `failed` and `auto-restart`, consuming CPU and flooding the journal.

Environment & Reproduction

Often appears after a configuration change or stale runtime state in `/run`.

Root Cause Analysis

Restart limits are too aggressive while the underlying error is unresolved, masking the real cause.

Quick Triage

Inspect `systemctl status ` and check rate limit counters with `systemctl show `.

Step-by-Step Diagnosis

Capture full context with `journalctl -u -b –no-pager` and verify ExecStart paths.

Illustrative mockup for sles-15 — systemd_service-fail-loop_terminal
Terminal diagnostics for systemd service stuck in restart loop on SLES 15 — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Fix the root error (config, permissions, port conflict), then `systemctl reset-failed` and start the unit.

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Illustrative mockup for sles-15 — systemd_service-fail-loop_logs
Logs and evidence for systemd service stuck in restart loop on SLES 15 — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Adjust `StartLimitBurst` and `RestartSec` only after the actual fault is corrected.

Verification & Acceptance Criteria

Unit reaches `active (running)` and stays up for at least 10 minutes under load.

Rollback Plan

Disable the unit and restart from a known-good config via Salt or AutoYaST.

Prevention & Hardening

Add health probes and monitor restart counts in Prometheus or SUSE Manager.

Pairs with `start request repeated too quickly` journal entries.

Related tutorial: View the step-by-step tutorial for sles-15.

View all sles-15 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

systemd.service(5) and SLES 15 systemd troubleshooting guides.

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