CertLens Blog
Practical guides for engineers debugging TLS failures, certificate chains, and PKI infrastructure in the real world.
How to Fix PKIX path building failed in Java
The most common Java TLS error, decoded. What it actually means, why it happens, and the exact commands to fix it — for JKS keystores, PKCS#12 bundles, and live TLS endpoints.
JKS vs PKCS#12 — Which Should You Use in 2026?
JKS is deprecated in modern Java. Here's what's changed, when to migrate, and the exact commands to do it safely.
Debugging SWIFT Alliance mTLS Certificate Failures
Keystores, trust stores, and the exact certificates SWIFT requires. Fix PKIX failures and client cert rejections.
The OpenSSL Commands Every Engineer Should Know
Inspect certs, verify chains, test TLS — the copy-ready commands you'll actually use in production.
TLS Certificate Debugging in Kubernetes
Ingress TLS errors, cert-manager issues, and x509 failures in pods — with kubectl commands and practical fixes.
Certificate Expiry Monitoring — A Practical Guide
Why certs expire in production and how to build a monitoring strategy that actually catches them in time.
PKIX path building failed — Complete Guide
Why verify error:num=20 happens and how to fix it in every environment.
Stop debugging certificates manually.
Try CertLens Free →CertLens Blog
Practical guides for engineers debugging TLS failures, certificate chains, and PKI infrastructure in the real world.
How to Fix PKIX path building failed in Java
The most common Java TLS error, decoded. What it actually means, why it happens, and the exact commands to fix it — for JKS keystores, PKCS#12 bundles, and live TLS endpoints.
PKIX path building failed — Complete Guide
Why verify error:num=20 happens and how to fix it in every environment.
Debugging SWIFT Alliance mTLS Certificate Failures
Keystores, trust stores, and the exact certificates SWIFT requires.
JKS vs PKCS#12 — Which Should You Use in 2026?
Comparing Java keystores — formats, compatibility, and migration commands.
The OpenSSL Commands Every Engineer Should Know
Inspect certs, verify chains, test TLS — the commands you'll actually use.
TLS Certificate Debugging in Kubernetes
Ingress TLS, cert-manager, and how to diagnose handshake failures in k8s.
Certificate Expiry Monitoring — A Practical Guide
Why certs expire in production and how to build a monitoring strategy.
Stop debugging certificates manually.
Try CertLens Free →