com.mojang.authlib.exceptions.AuthenticationUnavailableException: Cannot contact authentication server

Ask Ubuntu | 075 | 1 year ago
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Root Cause Analysis

  1. sun.security.provider.certpath.SunCertPathBuilderException

    unable to find valid certification path to requested target

    at sun.security.provider.certpath.SunCertPathBuilder.build()
  2. Java RT
    Validator.validate
    1. sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:146)[?:1.8.0_66-internal]
    2. sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)[?:1.8.0_66-internal]
    3. java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)[?:1.8.0_66-internal]
    4. sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)[?:1.8.0_66-internal]
    5. sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)[?:1.8.0_66-internal]
    6. sun.security.validator.Validator.validate(Validator.java:260)[?:1.8.0_66-internal]
    6 frames
  3. Java JSSE
    SSLSocketImpl.startHandshake
    1. sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)[?:1.8.0_66-internal]
    2. sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)[?:1.8.0_66-internal]
    3. sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)[?:1.8.0_66-internal]
    4. sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)[?:1.8.0_66-internal]
    5. sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)[?:1.8.0_66-internal]
    6. sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)[?:1.8.0_66-internal]
    7. sun.security.ssl.Handshaker.process_record(Handshaker.java:914)[?:1.8.0_66-internal]
    8. sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)[?:1.8.0_66-internal]
    9. sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)[?:1.8.0_66-internal]
    10. sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)[?:1.8.0_66-internal]
    11. sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)[?:1.8.0_66-internal]
    11 frames
  4. Java RT
    HttpsURLConnectionImpl.getOutputStream
    1. sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)[?:1.8.0_66-internal]
    2. sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)[?:1.8.0_66-internal]
    3. sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1283)[?:1.8.0_66-internal]
    4. sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1258)[?:1.8.0_66-internal]
    5. sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)[?:1.8.0_66-internal]
    5 frames
  5. com.mojang.authlib
    YggdrasilUserAuthentication.logIn
    1. com.mojang.authlib.HttpAuthenticationService.performPostRequest(HttpAuthenticationService.java:73)[launcher.jar:1.6.44]
    2. com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:54)[launcher.jar:1.6.44]
    3. com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logInWithPassword(YggdrasilUserAuthentication.java:74)[launcher.jar:1.6.44]
    4. com.mojang.authlib.yggdrasil.YggdrasilUserAuthentication.logIn(YggdrasilUserAuthentication.java:57)[launcher.jar:1.6.44]
    4 frames
  6. net.minecraft.launcher
    LogInForm$4.run
    1. net.minecraft.launcher.ui.popups.login.LogInForm$4.run(LogInForm.java:171)[launcher.jar:1.6.44]
    1 frame
  7. Java RT
    Thread.run
    1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[?:1.8.0_66-internal]
    2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[?:1.8.0_66-internal]
    3. java.lang.Thread.run(Thread.java:745)[?:1.8.0_66-internal]
    3 frames