📖 ~1 min read
Table of contents
Symptom & Impact
Application fails at launch with shared library errors referencing incompatible OpenSSL symbols.
Environment & Reproduction
Typically follows manual library installs or mixing vendor binaries with system package versions.
Root Cause Analysis
Runtime loader resolves wrong libssl variant that does not satisfy binary symbol expectations.
Quick Triage
Capture exact loader error and identify binary/library origin before reinstalling packages.
Step-by-Step Diagnosis
Run ldd /path/app, dpkg -l | grep -E “openssl|libssl”, and echo $LD_LIBRARY_PATH to locate conflict source.
Solution – Primary Fix
Align application with Debian-supported OpenSSL packages, remove conflicting custom libs, and rebuild or reinstall app package.
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Solution – Alternative Approaches
Containerize app with pinned dependency set when host-level library convergence is not feasible.
Verification & Acceptance Criteria
Application starts cleanly and ldd output references expected system library paths only.
Rollback Plan
Revert package version pins and restore previous app artifact if compatibility regression persists.
Prevention & Hardening
Disallow ad hoc library installs on production and enforce dependency scans in deployment pipeline.
Related Errors & Cross-Refs
Common variants include “version `OPENSSL_x.y.z’ not found” during startup.
Related tutorial: View the step-by-step tutorial for debian-11.
View all debian-11 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Use Debian package policy docs and OpenSSL compatibility notes.
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