PKIX Path building failed - started over the weekend

[newcron]

Good Morning,

over the weekend, I’m getting this error message (Java 12) when trying to connect to a domain using a let’s encrypt certificate:

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Typically, this error message appears, when a self-signed certificate is being used - which is not the fact. I am quite certain, this started to be an issue over the last couple of days. Looking at the certificate, however I do not see a problem. It’s https://graph.homefully.tech

Does anybody have an idea what the problem could be?

Best,
Matthias

[JuergenAuer]

Hi @newcron

@newcron

I do not see a problem. It’s https://graph.homefully.tech

there is a check of your domain, ~45 minutes old - https://check-your-website.server-daten.de/?q=graph.homefully.tech

That

Domainname	Http-Status	redirect	Sec.	G
• http://graph.homefully.tech/
35.244.164.50	200		0.057	H
• https://graph.homefully.tech/
35.244.164.50	200		0.196	B

looks good, the certificate

CN=homeful.ly
	07.06.2019
	05.09.2019
expires in 80 days	*.homeful.ly, *.homefully.tech, homeful.ly - 3 entries

is new (but not created in the last days). But:

Chain - incomplete	
	1	CN=homeful.ly

Your server doesn't send the intermediate certificate. That may be the problem.

Should look like

Chain (complete)	
	1	CN=*.server-daten.de
	2	CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US

[newcron]

Hi Jürgen,

thanks for the input! Indeed that solved the problem!