编译Maven时出错

Question

I am trying to use Jangaroo to convert FLEX to HTML 5 and JavaScript. In order to do so I need to use Maven, and when compiling Maven (mvn compile), I get a couple errors. The errors are displayed below. Can anoyone help me out???

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[INFO] Scanning for projects...
Downloading: http://repo.maven.apache.org/maven2/net/jangaroo/jangaroo-maven-plu
gin/0.8.3/jangaroo-maven-plugin-0.8.3.pom
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR]   The project net.jangaroo.examples:hello-world:0.1.0-SNAPSHOT (F:\PROJE
CT_HOME\pom.xml) has 1 error
[ERROR]     Unresolveable build extension: Plugin net.jangaroo:jangaroo-maven-pl
ugin:0.8.3 or one of its dependencies could not be resolved: Failed to read arti
fact descriptor for net.jangaroo:jangaroo-maven-plugin:jar:0.8.3: Could not tran
sfer artifact net.jangaroo:jangaroo-maven-plugin:pom:0.8.3 from/to central (http
://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:80 [repo.mave
n.apache.org/199.27.74.192, repo.maven.apache.org/199.27.74.129] failed: Connect
ion timed out: connect -> [Help 2]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildin
gException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/PluginResoluti
onException

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Answer 1

Maven tries to download everything it needs for your build from its central Maven repository (or any other repository you specify in your Maven settings or pom.xml ). The error "Connection timed out" means that repo.maven.apache.org is (currently) not reachable from your machine under IP address 199.27.74.129. Either you have a network (configuration) problem, or the server was really down when you tried to compile. What is the output when you execute the following command?

ping repo.maven.apache.org

After you have compiled your project once, it can be re-compiled offline using the Maven command line switch -o (unless you add new dependencies that need to be downloaded).

Btw., you should really update to a more recent Jangaroo version. As of now, this would be 1.0.2 for jangaroo-maven-plugin and jangaroo-runtime and 1.0.3 for all other jangaroo-libs ( jangaroo-browser , jooflash , etc.).