Our hudson install is behind a http proxy. Therefor I have setup a HTTP proxy under the advanced settings for the plugin manager. Plugins download fine, but when using the auto download and install tools the proxy appears not to be used.

Exception when trying to auto install JDK

udson.util.IOException2: Failed to access https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewProductDetail-Start?ProductRef=jdk-6u17-oth-JPR@CDS-CDS_Developer
at hudson.tools.JDKInstaller.locateStage1(JDKInstaller.java:308)
at hudson.tools.JDKInstaller.locate(JDKInstaller.java:278)
at hudson.tools.JDKInstaller.performInstallation(JDKInstaller.java:115)
at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:61)
at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:99)
at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:155)
at hudson.model.JDK.forNode(JDK.java:121)
at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:657)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:77)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:58)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:577)
at hudson.model.Build$RunnerImpl.build(Build.java:165)
at hudson.model.Build$RunnerImpl.doRun(Build.java:133)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:417)
at hudson.model.Run.run(Run.java:1176)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:123)
Caused by: java.net.NoRouteToHostException: No route to host
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1225)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1219)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:906)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:234)
at hudson.tools.JDKInstaller.locateStage1(JDKInstaller.java:296)
... 18 more
Caused by: java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.Socket.connect(Socket.java:520)
at java.net.Socket.connect(Socket.java:470)
at sun.net.NetworkClient.doConnect(NetworkClient.java:157)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:388)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:523)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:278)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:335)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:176)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:765)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:162)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:934)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:1923)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getHeaderField(HttpsURLConnectionImpl.java:271)
at hudson.tools.JDKInstaller.locateStage1(JDKInstaller.java:290)
... 18 more

And the exception from installing maven
java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.Socket.connect(Socket.java:520)
at java.net.Socket.connect(Socket.java:470)
at sun.net.NetworkClient.doConnect(NetworkClient.java:157)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:388)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:523)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:231)
at sun.net.www.http.HttpClient.New(HttpClient.java:304)
at sun.net.www.http.HttpClient.New(HttpClient.java:321)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:813)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:765)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:690)
at hudson.FilePath.installIfNecessaryFrom(FilePath.java:537)
at hudson.tools.DownloadFromUrlInstaller.performInstallation(DownloadFromUrlInstaller.java:72)
at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:61)
at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:99)
at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:155)
at hudson.tasks.Maven$MavenInstallation.forNode(Maven.java:499)
at hudson.tasks.Maven.perform(Maven.java:239)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:577)
at hudson.model.Build$RunnerImpl.build(Build.java:165)
at hudson.model.Build$RunnerImpl.doRun(Build.java:133)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:417)
at hudson.model.Run.run(Run.java:1176)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:123)