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The users list might be also useful in understanding what has happened.Stack tracesun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target	at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)Caused: sun.security.validator.ValidatorException: PKIX path building failed	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)	at sun.security.validator.Validator.validate(Validator.java:260)	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1460)Caused: javax.net.ssl.SSLHandshakeException	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1937)	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1478)	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212)	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:957)	at sun.security.ssl.Handshaker.process_record(Handshaker.java:892)	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1050)	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1363)	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1391)	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1375)	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1512)	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440)	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)	at hudson.model.DownloadService.loadJSON(DownloadService.java:167)	at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:190)	at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1624)	at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:636)	at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:343)	at org.kohsuke.stapler.interceptor.RequirePOST$Processor.invoke(RequirePOST.java:52)	at org.kohsuke.stapler.PreInvokeInterceptedFunction.invoke(PreInvokeInterceptedFunction.java:26)	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:184)	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:117)	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:129)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)	at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:186)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)	at org.kohsuke.stapler.Stapler.service(Stapler.java:238)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:138)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:85)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2555)	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2544)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)

编译

javac InstallCert.java

生成证书

java InstallCert updates.jenkins.io

出现提示，输入1

将生成的证书jssecacerts放到jre\lib\security\

重启jenkins即可

引用

http://blog.csdn.net/jiang1986829/article/details/50955359