Google AppEngine maven application update

Question

While I'm trying to upload my maven AppEngine project to the google dev console using appengine:update, I get the exception below. My proxy is properly set up in maven's settings.xml because the dependencies were downloaded succesfuly. Also the project is working fine on the local server. Any ideas what could be the cause of the problem?

    INFO: Unable to access https://appengine.google.com/api/updatecheck?runtime=java
&release=1.9.18&timestamp=1423769416&api_versions=['1.0']
java.net.ConnectException: Connection refused: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketI
mpl.java:79)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.ja
va:339)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocket
Impl.java:200)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java
:182)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:579)
        at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:625)
        at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:160
)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
        at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:275)
        at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:371)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewH
ttpClient(AbstractDelegateHttpsURLConnection.java:191)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConne
ction.java:933)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect
(AbstractDelegateHttpsURLConnection.java:177)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:1301)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Http
sURLConnectionImpl.java:254)
        at java.net.URL.openStream(URL.java:1037)
        at com.google.appengine.tools.info.RemoteVersionFactory.getVersion(Remot
eVersionFactory.java:76)
        at com.google.appengine.tools.info.UpdateCheck.getApplicationVersionInfo
(UpdateCheck.java:153)
        at com.google.appengine.tools.info.UpdateCheck.maybePrintNagScreen(Updat
eCheck.java:361)
        at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:189)
        at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:128)
        at com.google.appengine.tools.admin.AppCfg.main(AppCfg.java:124)
        at com.google.appengine.appcfg.AbstractAppCfgMojo.executeAppCfgCommand(A
bstractAppCfgMojo.java:250)
        at com.google.appengine.appcfg.Update.execute(Update.java:32)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:134)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:208)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThre
adedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
eStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun
cher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav
a:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La
uncher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:
356)

Please enter code: 4/V5TzBQzOQLxtII2MJCaA1lnE-ZVMqEcGpszvkqPWC7E.0rbx92WB4zwRyjz
_MlCJoi3gh4WrmAI
java.net.SocketTimeoutException: connect timed out

Answer 1

The problem was cause by the fact that maven was not reading my both http and https proxy entries from the settings.xml file. I putted only the http entry there and passed the https proxy trought the command line with -Dhttps.proxyHost=<host> -Dhttps.proxyPort=<port>.