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https://jira.codehaus.org/browse/MNG-5682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=351861#comment-351861
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Brian Brooks commented on MNG-5682:
-----------------------------------
I've encountered this error before and it was a copy-paste mistake when setting
up a new project.
My project layout looked like
\---super
\---thirdparty
+---mod1-root
| +---mod1-linux32
| \---mod1-win32
\---mod2-root
+---mod2-linux32
\---mod2-win32
In my case, I had a mistake in my pom.xmls at the modX-root-level. I had copied
the mod1-root tree and named it mod2-root. I thought I had updated all the
pom.xmls appropriately. In fact, mod2-root/pom.xml had the same group and
artifact ids as mod1-root/pom.xml. After correcting mod2-root's pom.xml to have
mod2-root specific maven coordinates my issue was resolved.
This info was originally posted by me here:
http://stackoverflow.com/a/23201278/110126
> Parent POMs not resolved in multi-module project
> ------------------------------------------------
>
> Key: MNG-5682
> URL: https://jira.codehaus.org/browse/MNG-5682
> Project: Maven
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 3.0.4, 3.1.1, 3.2.3
> Environment: Apache Maven 3.2.3
> (33f8c3e1027c3ddde99d3cdebad2656a31e8fdf4; 2014-08-11T22:58:10+02:00)
> Java version: 1.7.0_67, vendor: Oracle Corporation
> Default locale: en_US, platform encoding: Cp1250
> OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"
> Reporter: Kek
> Priority: Critical
> Attachments: test-project.zip
>
>
> I have multi-module project - I attach the similar simple project structure
> to this issue, to simulate the problem => !test-project.zip!.
> The structure is:
> {noformat}
> A - aggregating project, parent for "parent"
> |_parent - parent for B and C
> |_B
> |_C
> {noformat}
> In reality we have more parents under A for diferent types of A-submodules,
> but now it does not matter.
> When we run build under maven 2.2.1 - everything is OK, the reactor sorts
> the projects like A, PARENT, B,C and build success.
> When we run the same build under maven 3.x (3.0.4, 3.1.1, 3.2.3 was tested),
> the build fails with following errors:
> a>mvn clean
> [INFO] Scanning for projects...
> [ERROR] The build could not read 2 projects -> [Help 1]
> [ERROR]
> [ERROR] The project a:b:[unknown-version] (\a\b\pom.xml) has 1 error
> [ERROR] Non-resolvable parent POM: Could not find artifact
> a:parent:pom:0.0.1-SNAPSHOT and 'parent.relativePath' points at wrong local
> POM @ line 6, column 10 -> [Help 2]
> [ERROR]
> [ERROR] The project a:c:[unknown-version] (\a\c\pom.xml) has 1 error
> [ERROR] Non-resolvable parent POM: Could not find artifact
> a:parent:pom:0.0.1-SNAPSHOT and 'parent.relativePath' points at wrong local
> POM @ line 6, column 10 -> [Help 2]
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e
> switch.
> [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
> read the following articles:
> [ERROR] [Help 1]
> http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
> [ERROR] [Help 2]
> http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException
> There is no explicit "relativePath" set in project POMs.
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