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  1. ,
    Expert tip

    If you're using wiremock, configure your code to accept wiremock self-signed certificate or create a keystore and certificate that are trusted by your HTTP client and configure wiremock to use that

  2. ,
    via Stack Overflow by carlos

    Set the mail.smtp.ssl.trust system property to an smtp host, like smtp.gmail.com.

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via Google Groups by Royal Gaming, 1 year ago
Cannot contact authentication server
via Ask Ubuntu by 075
, 1 year ago
Cannot contact authentication server
via GitHub by l89669
, 1 year ago
Cannot contact authentication server
com.mojang.authlib.exceptions.AuthenticationUnavailableException: Cannot contact authentication server at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:71)[launcher.jar:1.6.44] at com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logInWithPassword(YggdrasilUserAuthentication.java:74)[launcher.jar:1.6.44] at com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logIn(YggdrasilUserAuthentication.java:57)[launcher.jar:1.6.44] at net.minecraft.launcher.ui.popups.login.LogInForm$4.run(LogInForm.java:171)[launcher.jar:1.6.44] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[?:1.8.0_66-internal] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[?:1.8.0_66-internal] at java.lang.Thread.run(Thread.java:745)[?:1.8.0_66-internal]Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)[?:1.8.0_66-internal] at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)[?:1.8.0_66-internal] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)[?:1.8.0_66-internal] at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)[?:1.8.0_66-internal] at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)[?:1.8.0_66-internal] at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)[?:1.8.0_66-internal] at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)[?:1.8.0_66-internal] at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)[?:1.8.0_66-internal] at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)[?:1.8.0_66-internal] at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)[?:1.8.0_66-internal] at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)[?:1.8.0_66-internal] at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)[?:1.8.0_66-internal] at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)[?:1.8.0_66-internal] at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)[?:1.8.0_66-internal] at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1283)[?:1.8.0_66-internal] at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1258)[?:1.8.0_66-internal] at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)[?:1.8.0_66-internal] at com.mojang.authlib.HttpAuthenticationService.performPostRequest(HttpAuthenticationService.java:73)[launcher.jar:1.6.44] at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:54)[launcher.jar:1.6.44] ... 6 moreCaused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)[?:1.8.0_66-internal] at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)[?:1.8.0_66-internal] at sun.security.validator.Validator.validate(Validator.java:260)[?:1.8.0_66-internal] at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)[?:1.8.0_66-internal] at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)[?:1.8.0_66-internal] at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)[?:1.8.0_66-internal] at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)[?:1.8.0_66-internal] ... 20 moreCaused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:146)[?:1.8.0_66-internal] at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)[?:1.8.0_66-internal] at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)[?:1.8.0_66-internal] at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)[?:1.8.0_66-internal] ... 26 more