maven unable to download artifacts

[Pradeep Kumar]

Hi All,
I have written a build script using maven. the maven is running behind our company's proxy so i have entered the proxy information correctly in the settings.xml file. Its a linux machine. For some dependency like below when i try running maven i am getting Connection timeout exception hence the build is failing. below is the settings from the settings.xml

<settings>
  <proxies>
   <proxy>
      <active>true</active>
      <protocol>http</protocol>
      <host>hostname</host>
      <port>80</port>
      <nonProxyHosts>*companyname.net</nonProxyHosts>
    </proxy>
  </proxies> 
</settings>

http://fpdownload.adobe.com/pub/swz/flex/4.6.0.23201/framework_4.6.0.23201.swz

Below is the trace of the exception

java.net.ConnectException: Connection timed out
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
	at java.net.Socket.connect(Socket.java:529)
	at java.net.Socket.connect(Socket.java:478)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
	at sun.net.www.http.HttpClient.New(HttpClient.java:306)
	at sun.net.www.http.HttpClient.New(HttpClient.java:323)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1172)
	at java.net.URL.openStream(URL.java:1010)

All other artifacts are being fetched properly and i can ping fpdownload.adobe.com from the machine. I have no clue as of how to fix this.

[Peter Johnson]

I assume that the URL you provide to the flex framework is the artifact that would not download. How are you declaring the http://fpdownload.adobe.com repository? Also there is usually additional information about the download attempts right before the stack trace, it would be helpful to see those also.

[Pradeep Kumar]

I could resolve it by temporarily uploading the artifact to the internal repository. The reason I was not able to download the artifact behind the proxy is that I was using the maven-external-dependency plugin to download from n external url and the plugin is not connection the url through the proxy setting. I guess its a bug in the plugin.

<plugin>
                <groupId>com.savage7.maven.plugins</groupId>
                <artifactId>maven-external-dependency-plugin</artifactId>
                <version>0.4</version>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>resolve-external</goal>
                            <goal>install-external</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <createChecksum>true</createChecksum>
                    <skipChecksumVerification>false</skipChecksumVerification>
                    <artifactItems>
                        <artifactItem>
                            <groupId>com.adobe.flex.framework</groupId>
                            <artifactId>framework</artifactId>
                            <version>${flex.sdk.version}</version>
                            <packaging>swz</packaging>
                            <downloadUrl>http://fpdownload.adobe.com/pub/swz/flex/${flex.sdk.version}/{artifactId}_{version}.{packaging}</downloadUrl>
                        </artifactItem>
                        <artifactItem>
                            <groupId>com.adobe.flex.framework</groupId>
                            <artifactId>textLayout</artifactId>
                            <version>${flex.tlf.version}</version>
                            <packaging>swz</packaging>
                            <downloadUrl>http://fpdownload.adobe.com/pub/swz/tlf/${flex.tlf.version}/{artifactId}_{version}.{packaging}</downloadUrl>
                        </artifactItem>
                        <artifactItem>
                            <groupId>com.adobe.flex.framework</groupId>
                            <artifactId>osmf</artifactId>
                            <version>${flex.osmf.version}</version>
                            <packaging>swz</packaging>
                            <downloadUrl>http://fpdownload.adobe.com/pub/swz/flex/${flex.sdk.version}/{artifactId}_{version}.{packaging}</downloadUrl>
                        </artifactItem>
 . . . . .