migration form 2.x to 3.0-betax wasn't much of a problem, but since then, I
had to release components and fix version.

Now with maven-site-plugin:3.0, I have a recurring error and can't find any
information on it. It basically looks like this, happens on 'mvn site' goal.

Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

        at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:139)
        at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        ... 19 more
Caused by: org.apache.maven.plugin.PluginContainerException: An API
incompatibility was encountered while executing
org.apache.maven.plugins:maven-site-plugin:3.0:site:
java.lang.AbstractMethodError: null

I still have a couple of small components which can successfully pass the
'site' goal, but they don't seem to have anything different from the others.
Can't figure anything form those, site.xml is identical in every project.

See end of post for complete debug stack trace.

Thanks for any help or pointer.



realm =    plugin>org.apache.maven.plugins:maven-site-plugin:3.0
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] =
file:/Users/nodje/.m2/repository/org/apache/maven/plugins/maven-site-plugin/3.0/maven-site-plugin-3.0.jar
urls[1] =
file:/Users/nodje/.m2/repository/org/apache/maven/reporting/maven-reporting-exec/1.0.1/maven-reporting-exec-1.0.1.jar
urls[2] =
file:/Users/nodje/.m2/repository/org/apache/maven/reporting/maven-reporting-api/3.0/maven-reporting-api-3.0.jar
urls[3] =
file:/Users/nodje/.m2/repository/org/apache/velocity/velocity/1.5/velocity-1.5.jar
urls[4] = file:/Users/nodje/.m2/repository/oro/oro/2.0.8/oro-2.0.8.jar
urls[5] =
file:/Users/nodje/.m2/repository/velocity/velocity/1.5/velocity-1.5.jar
urls[6] =
file:/Users/nodje/.m2/repository/org/sonatype/aether/aether-util/1.7/aether-util-1.7.jar
urls[7] =
file:/Users/nodje/.m2/repository/org/sonatype/sisu/sisu-inject-bean/1.4.2/sisu-inject-bean-1.4.2.jar
urls[8] =
file:/Users/nodje/.m2/repository/org/sonatype/sisu/sisu-guice/2.1.7/sisu-guice-2.1.7-noaop.jar
urls[9] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.14/plexus-interpolation-1.14.jar
urls[10] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar
urls[11] =
file:/Users/nodje/.m2/repository/org/sonatype/plexus/plexus-sec-dispatcher/1.3/plexus-sec-dispatcher-1.3.jar
urls[12] =
file:/Users/nodje/.m2/repository/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar
urls[13] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.2/doxia-sink-api-1.2.jar
urls[14] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-logging-api/1.2/doxia-logging-api-1.2.jar
urls[15] =
file:/Users/nodje/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
urls[16] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-core/1.2/doxia-core-1.2.jar
urls[17] =
file:/Users/nodje/.m2/repository/xerces/xercesImpl/2.9.1/xercesImpl-2.9.1.jar
urls[18] =
file:/Users/nodje/.m2/repository/xml-apis/xml-apis/1.3.04/xml-apis-1.3.04.jar
urls[19] =
file:/Users/nodje/.m2/repository/org/apache/httpcomponents/httpclient/4.0.2/httpclient-4.0.2.jar
urls[20] =
file:/Users/nodje/.m2/repository/org/apache/httpcomponents/httpcore/4.0.1/httpcore-4.0.1.jar
urls[21] =
file:/Users/nodje/.m2/repository/commons-codec/commons-codec/1.3/commons-codec-1.3.jar
urls[22] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-module-xhtml/1.2/doxia-module-xhtml-1.2.jar
urls[23] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-module-apt/1.2/doxia-module-apt-1.2.jar
urls[24] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-module-xdoc/1.2/doxia-module-xdoc-1.2.jar
urls[25] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-module-fml/1.2/doxia-module-fml-1.2.jar
urls[26] =
file:/Users/nodje/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar
urls[27] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-decoration-model/1.2/doxia-decoration-model-1.2.jar
urls[28] =
file:/Users/nodje/.m2/repository/org/apache/maven/doxia/doxia-site-renderer/1.2/doxia-site-renderer-1.2.jar
urls[29] =
file:/Users/nodje/.m2/repository/commons-collections/commons-collections/3.2.1/commons-collections-3.2.1.jar
urls[30] =
file:/Users/nodje/.m2/repository/org/apache/maven/shared/maven-doxia-tools/1.4/maven-doxia-tools-1.4.jar
urls[31] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-archiver/1.0/plexus-archiver-1.0.jar
urls[32] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-io/1.0/plexus-io-1.0.jar
urls[33] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-i18n/1.0-beta-7/plexus-i18n-1.0-beta-7.jar
urls[34] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-velocity/1.1.8/plexus-velocity-1.1.8.jar
urls[35] =
file:/Users/nodje/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.10/plexus-utils-1.5.10.jar
urls[36] =
file:/Users/nodje/.m2/repository/org/mortbay/jetty/jetty/6.1.25/jetty-6.1.25.jar
urls[37] =
file:/Users/nodje/.m2/repository/org/mortbay/jetty/servlet-api/2.5-20081211/servlet-api-2.5-20081211.jar
urls[38] =
file:/Users/nodje/.m2/repository/org/mortbay/jetty/jetty-util/6.1.25/jetty-util-6.1.25.jar
urls[39] =
file:/Users/nodje/.m2/repository/commons-lang/commons-lang/2.5/commons-lang-2.5.jar
urls[40] =
file:/Users/nodje/.m2/repository/commons-io/commons-io/1.4/commons-io-1.4.jar
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

        at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:139)
        at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        ... 19 more
Caused by: org.apache.maven.plugin.PluginContainerException: An API
incompatibility was encountered while executing
org.apache.maven.plugins:maven-site-plugin:3.0:site:
java.lang.AbstractMethodError: null

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