Error in resolving buildtime dependencies while installing CloudStack on ubuntu.
I am installing cloudstack on ubuntu and it uses maven to resolve its dependencies. I am getting the following errors when am running the command mvn -P deps
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project org.apache.cloudstack:cloudstack:4.2.0 (/home/cloud/apache-cloudstack-4.2.0-src/pom.xml) has 1 error
[ERROR] Non-resolvable parent POM: Could not transfer artifact org.apache:apache:pom:11 from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org: Name or service not known and 'parent.relativePath' points at wrong local POM @ line 14, column 11: Unknown host repo.maven.apache.org: Name or service not known -> [Help 2]
[ERROR]
I have searched the error and tried a number of changes in pom.xml but i am not getting the solution. I dont know whats causing the error.
any suggestion or slightest help will be acknowledged. Thank you.
Answer
This is a networking issue:
Your build machine cannot access http://repo.maven.apache.org/maven2
Use wget at command line to check if you can access the website. E.g.
root@mgmtserver:~/cm# wget http://repo.maven.apache.org/maven2
--2013-10-14 16:33:24-- http://repo.maven.apache.org/maven2
Resolving repo.maven.apache.org (repo.maven.apache.org)... 185.31.19.184, 185.31.19.185
Connecting to repo.maven.apache.org (repo.maven.apache.org)|185.31.19.184|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://central.maven.org/maven2/ [following]
--2013-10-14 16:33:24-- http://central.maven.org/maven2/
Resolving central.maven.org (central.maven.org)... 185.31.19.184, 185.31.19.185
Reusing existing connection to repo.maven.apache.org:80.
HTTP request sent, awaiting response... 200 OK
Length: 967 [text/html]
Saving to: `maven2'
100%[=====================================================>] 967 --.-K/s in 0s
2013-10-14 16:33:24 (74.4 MB/s) - `maven2' saved [967/967]
Reasons why wget might fail:
- the Maven repo is temporarily down. Wait until it works.
- no network adapter on your build machine. Check that it has network access.
- your proxy settings are incorrect. Try this solution, or the Maven mini-guide proxy settings
Background:
Apache CloudStack's POM.xml inherits predefined values from the Apache Software Foundation Parent POM. As a result, a Maven build first downloads the required POM from a network location, and Maven stores it locally in the Maven repository, which is a kind of local cache.
Final remarks:
If you're curious, the source for the POM being download is here.