Multimodule Configuration of Checkstyle-plugin errors

[Aleksandr Fedorov <al...@gmail.com>]

Hi everyone!
I added checkstyle-plugin in the project according to the site -
http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/multi-module-config.html
But I got an error:
[INFO] Scanning for projects ...
[ERROR] The projects in the reactor contain a cyclic reference: Edge
between 'Vertex {label =' eu.stratosphere: stratosphere-dist :0.5-SNAPSHOT
'}' and 'Vertex {label =' eu.stratosphere: stratosphere-core: 0.5-SNAPSHOT
'}' introduces to cycle in the graph eu.stratosphere: stratosphere-core
:0.5-SNAPSHOT -> eu.stratosphere: stratosphere-dist :0.5-SNAPSHOT ->
eu.stratosphere: stratosphere-core: 0.5- SNAPSHOT -> [Help 1]
[ERROR]
Commit with the addition of plug-in -
https://github.com/alexff91/stratosphere/commit/d57bd5df3be7d9eac0454627cb643d16003133e9
My configuration :
Maven + Version - 3.0.4
Windows 8 64 -bit
Java - 1.7.0_25
With another configurations I got:
[INFO] Scanning for projects ...
[ERROR] Internal error: java.lang.NullPointerException -> [Help 1]
org.apache.maven.InternalErrorException: Internal error:
java.lang.NullPointerException
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java: 167)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java: 584 )
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java: 213)

Console output can be found here :
https://travis-ci.org/alexff91/stratosphere/builds/24120318

-- 
With best wishes and regards,
Fedorov Aleksandr.