io.grpc.StatusRuntimeException: UNAVAILABLE: io exception [...] Caused by: javax.net.ssl.SSLHandshakeException: General OpenSslEngine problem [...] Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors [...] Caused by: java.security.cert.CertPathValidatorException: Path does not chain with any of the trust anchors [...]