在新机器上安装jenkins后，安装插件报如下错误

  1. sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  2. 	at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
  3. 	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
  4. 	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
  5. 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
  6. Caused: sun.security.validator.ValidatorException: PKIX path building failed
  7. 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
  8. 	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
  9. 	at sun.security.validator.Validator.validate(Validator.java:260)
  10. 	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
  11. 	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
  12. 	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
  13. 	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
  14. Caused: javax.net.ssl.SSLHandshakeException
  15. 	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
  16. 	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
  17. 	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
  18. 	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
  19. 	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
  20. 	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
  21. 	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
  22. 	at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
  23. 	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
  24. 	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
  25. 	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
  26. 	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
  27. 	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
  28. 	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
  29. 	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
  30. 	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
  31. 	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
  32. 	at hudson.model.DownloadService.loadJSON(DownloadService.java:167)
  33. 	at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:190)
  34. 	at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1633)
  35. 	at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
  36. 	at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:343)
  37. 	at org.kohsuke.stapler.interceptor.RequirePOST$Processor.invoke(RequirePOST.java:52)
  38. 	at org.kohsuke.stapler.PreInvokeInterceptedFunction.invoke(PreInvokeInterceptedFunction.java:26)
  39. 	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:184)
  40. 	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:117)
  41. 	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:129)
  42. 	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
  43. 	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)
  44. 	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
  45. 	at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:186)
  46. 	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
  47. 	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)
  48. 	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
  49. 	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
  50. 	at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
  51. 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
  52. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
  53. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  54. 	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
  55. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  56. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  57. 	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
  58. 	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:138)
  59. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  60. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  61. 	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:85)
  62. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  63. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  64. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
  65. 	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
  66. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  67. 	at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
  68. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  69. 	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
  70. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  71. 	at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
  72. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  73. 	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
  74. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  75. 	at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
  76. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  77. 	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
  78. 	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
  79. 	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  80. 	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)
  81. 	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
  82. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  83. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  84. 	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
  85. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  86. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  87. 	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
  88. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  89. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  90. 	at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
  91. 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  92. 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  93. 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
  94. 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
  95. 	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:619)
  96. 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
  97. 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
  98. 	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
  99. 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
  100. 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
  101. 	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:417)
  102. 	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
  103. 	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
  104. 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
  105. 	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
  106. 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  107. 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  108. 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  109. 	at java.lang.Thread.run(Thread.java:745)

第一次遇到这种问题，百度了下找到如下解决方案

原方案地址：

http://blog.csdn.net/faye0412/article/details/6883879

简要摘录如下

新建一个java文件，代码如下

  1.  /*
  2.   * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
  3.   *
  4.   * Redistribution and use in source and binary forms, with or without
  5.   * modification, are permitted provided that the following conditions
  6.   * are met:
  7.   *
  8.   *   - Redistributions of source code must retain the above copyright
  9.   *     notice, this list of conditions and the following disclaimer.
  10.   *
  11.   *   - Redistributions in binary form must reproduce the above copyright
  12.   *     notice, this list of conditions and the following disclaimer in the
  13.   *     documentation and/or other materials provided with the distribution.
  14.   *
  15.   *   - Neither the name of Sun Microsystems nor the names of its
  16.   *     contributors may be used to endorse or promote products derived
  17.   *     from this software without specific prior written permission.
  18.   *
  19.   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20.   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21.   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22.   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23.   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24.   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25.   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26.   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27.   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28.   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29.   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30.   */
  31.  
  32.  import java.io.BufferedReader;
  33.  import java.io.File;
  34.  import java.io.FileInputStream;
  35.  import java.io.FileOutputStream;
  36.  import java.io.InputStream;
  37.  import java.io.InputStreamReader;
  38.  import java.io.OutputStream;
  39.  import java.security.KeyStore;
  40.  import java.security.MessageDigest;
  41.  import java.security.cert.CertificateException;
  42.  import java.security.cert.X509Certificate;
  43.  
  44.  import javax.net.ssl.SSLContext;
  45.  import javax.net.ssl.SSLException;
  46.  import javax.net.ssl.SSLSocket;
  47.  import javax.net.ssl.SSLSocketFactory;
  48.  import javax.net.ssl.TrustManager;
  49.  import javax.net.ssl.TrustManagerFactory;
  50.  import javax.net.ssl.X509TrustManager;
  51.  
  52.  public class InstallCert {
  53.  
  54.      public static void main(String[] args) throws Exception {
  55.          String host;
  56.          int port;
  57.          char[] passphrase;
  58.          if ((args.length == 1) || (args.length == 2)) {
  59.              String[] c = args[0].split(":");
  60.              host = c[0];
  61.              port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
  62.              String p = (args.length == 1) ? "changeit" : args[1];
  63.              passphrase = p.toCharArray();
  64.          } else {
  65.              System.out
  66.                      .println("Usage: java InstallCert <host>[:port] [passphrase]");
  67.              return;
  68.          }
  69.  
  70.          File file = new File("jssecacerts");
  71.          if (file.isFile() == false) {
  72.              char SEP = File.separatorChar;
  73.              File dir = new File(System.getProperty("java.home") + SEP + "lib"
  74.                      + SEP + "security");
  75.              file = new File(dir, "jssecacerts");
  76.              if (file.isFile() == false) {
  77.                  file = new File(dir, "cacerts");
  78.              }
  79.          }
  80.          System.out.println("Loading KeyStore " + file + "...");
  81.          InputStream in = new FileInputStream(file);
  82.          KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
  83.          ks.load(in, passphrase);
  84.          in.close();
  85.  
  86.          SSLContext context = SSLContext.getInstance("TLS");
  87.          TrustManagerFactory tmf = TrustManagerFactory
  88.                  .getInstance(TrustManagerFactory.getDefaultAlgorithm());
  89.          tmf.init(ks);
  90.          X509TrustManager defaultTrustManager = (X509TrustManager) tmf
  91.                  .getTrustManagers()[0];
  92.          SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
  93.          context.init(null, new TrustManager[] { tm }, null);
  94.          SSLSocketFactory factory = context.getSocketFactory();
  95.  
  96.          System.out
  97.                  .println("Opening connection to " + host + ":" + port + "...");
  98.          SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
  99.          socket.setSoTimeout(10000);
  100.          try {
  101.              System.out.println("Starting SSL handshake...");
  102.              socket.startHandshake();
  103.              socket.close();
  104.              System.out.println();
  105.              System.out.println("No errors, certificate is already trusted");
  106.          } catch (SSLException e) {
  107.              System.out.println();
  108.              e.printStackTrace(System.out);
  109.          }
  110.  
  111.          X509Certificate[] chain = tm.chain;
  112.          if (chain == null) {
  113.              System.out.println("Could not obtain server certificate chain");
  114.              return;
  115.          }
  116.  
  117.          BufferedReader reader = new BufferedReader(new InputStreamReader(
  118.                  System.in));
  119.  
  120.          System.out.println();
  121.          System.out.println("Server sent " + chain.length + " certificate(s):");
  122.          System.out.println();
  123.          MessageDigest sha1 = MessageDigest.getInstance("SHA1");
  124.          MessageDigest md5 = MessageDigest.getInstance("MD5");
  125.          for (int i = 0; i < chain.length; i++) {
  126.              X509Certificate cert = chain[i];
  127.              System.out.println(" " + (i + 1) + " Subject "
  128.                      + cert.getSubjectDN());
  129.              System.out.println("   Issuer  " + cert.getIssuerDN());
  130.              sha1.update(cert.getEncoded());
  131.              System.out.println("   sha1    " + toHexString(sha1.digest()));
  132.              md5.update(cert.getEncoded());
  133.              System.out.println("   md5     " + toHexString(md5.digest()));
  134.              System.out.println();
  135.          }
  136.  
  137.          System.out
  138.                  .println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
  139.          String line = reader.readLine().trim();
  140.          int k;
  141.          try {
  142.              k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
  143.          } catch (NumberFormatException e) {
  144.              System.out.println("KeyStore not changed");
  145.              return;
  146.          }
  147.  
  148.          X509Certificate cert = chain[k];
  149.          String alias = host + "-" + (k + 1);
  150.          ks.setCertificateEntry(alias, cert);
  151.  
  152.          OutputStream out = new FileOutputStream("jssecacerts");
  153.          ks.store(out, passphrase);
  154.          out.close();
  155.  
  156.          System.out.println();
  157.          System.out.println(cert);
  158.          System.out.println();
  159.          System.out
  160.                  .println("Added certificate to keystore 'jssecacerts' using alias '"
  161.                          + alias + "'");
  162.      }
  163.  
  164.      private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
  165.  
  166.      private static String toHexString(byte[] bytes) {
  167.          StringBuilder sb = new StringBuilder(bytes.length * 3);
  168.          for (int b : bytes) {
  169.              b &= 0xff;
  170.              sb.append(HEXDIGITS[b >> 4]);
  171.              sb.append(HEXDIGITS[b & 15]);
  172.              sb.append(' ');
  173.          }
  174.          return sb.toString();
  175.      }
  176.  
  177.      private static class SavingTrustManager implements X509TrustManager {
  178.  
  179.          private final X509TrustManager tm;
  180.          private X509Certificate[] chain;
  181.  
  182.          SavingTrustManager(X509TrustManager tm) {
  183.              this.tm = tm;
  184.          }
  185.  
  186.          public X509Certificate[] getAcceptedIssuers() {
  187.              throw new UnsupportedOperationException();
  188.          }
  189.  
  190.          public void checkClientTrusted(X509Certificate[] chain, String authType)
  191.                  throws CertificateException {
  192.              throw new UnsupportedOperationException();
  193.          }
  194.  
  195.          public void checkServerTrusted(X509Certificate[] chain, String authType)
  196.                  throws CertificateException {
  197.              this.chain = chain;
  198.              tm.checkServerTrusted(chain, authType);
  199.          }
  200.      }
  201.  
  202.  }

编译InstallCert.java，然后执行：java InstallCert updates.jenkins.io

将证书jssecacerts拷贝到$JAVA_HOME/jre/lib/security目录下，重启tomcat即可

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