I am getting below error when I call a API using auto generated client for openapi-generator-maven-plugin.
javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target\n\tat java.base/sun.security.ssl.Alert.createSSLException(Alert.java:131)\n\tat java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:349)\n\tat java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:292)\n\tat java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:287)\n\tat java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:654)\n\tat java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(CertificateMessage.java:473)\n\tat java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(CertificateMessage.java:369)\n\tat java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392)\n\tat java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:443)\n\tat java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:421)\n\tat java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:182)\n\tat java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:171)\n\tat java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1408)\n\tat java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1314)\n\tat java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:440)\n\tat java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:411)\n\tat org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394)\n\tat org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353)\n\tat org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141)\n\tat org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)\n\tat org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)\n\tat org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)\n\tat org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)\n\tat org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)\n\tat org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)\n\tat org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)\n\tat org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)\n\tat org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)\n\tat com.amdocs.nfvo.extensions.cm.ran.restclient.RestHttpClient.getToken(RestHttpClient.java:31)\n\tat com.amdocs.nfvo.extensions.cm.ran.restclient.RestClientHelper.getAccessToken(RestClientHelper.java:73)\n\t... 22 common frames omitted\nCaused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target\n\tat java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:439)\n\tat java.base/sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:306)\n\tat java.base/sun.security.validator.Validator.validate(Validator.java:264)\n\tat java.base/sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:313)\n\tat java.base/sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:222)\n\tat java.base/sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:129)\n\tat java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:638)\n\t... 47 common frames omitted\nCaused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target\n\tat java.base/sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)\n\tat java.base/sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)\n\tat java.base/java.security.cert.CertPathBuilder.build(CertPathBuilder.java:297)\n\tat
I have also tried with below option in POM
> <environmentVariables>
> <io.swagger.parser.util.RemoteUrl.trustAll>true</io.swagger.parser.util.RemoteUrl.trustAll>
> <io.swagger.v3.parser.util.RemoteUrl.trustAll>true</io.swagger.v3.parser.util.RemoteUrl.trustAll>
> </environmentVariables>
