jenkins에서 There were errors checking the update sites: SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 에러발생시

• Dashboard > Jenkins 관리 > Plugin Manager > 고급 > https://updates.jenkins.io/update-center.json => http://updates.jenkins.io/update-center.json 로 변경