On Tue, Aug 2, 2016 at 10:42 AM, Ahmet Temiz <ahmettemiz88@gmail.com> wrote:

from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target @ line 69, column 25

you have problem accessing maven central as your client (maven/java) cannot establish SSL channel as probably your client is too old and doeasn't know CA with which maven central repo certificate is made with.

I would suggest you to upgrade java 8 to latest version (currently u102) and update maven.