Caused by: org.apache.maven.plugin.PluginContainerException: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.2' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: Cannot access defaults field of Properties
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realm =    plugin>org.apache.maven.plugins:maven-war-plugin:2.2
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/home/jenkins/.m2/repository/org/apache/maven/plugins/maven-war-plugin/2.2/maven-war-plugin-2.2.jar
urls[1] = file:/home/jenkins/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
urls[2] = file:/home/jenkins/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
urls[3] = file:/home/jenkins/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
urls[4] = file:/home/jenkins/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
urls[5] = file:/home/jenkins/.m2/repository/org/apache/maven/maven-archiver/2.5/maven-archiver-2.5.jar
urls[6] = file:/home/jenkins/.m2/repository/org/codehaus/plexus/plexus-io/2.0.2/plexus-io-2.0.2.jar
urls[7] = file:/home/jenkins/.m2/repository/org/codehaus/plexus/plexus-archiver/2.1/plexus-archiver-2.1.jar
urls[8] = file:/home/jenkins/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.15/plexus-interpolation-1.15.jar
urls[9] = file:/home/jenkins/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
urls[10] = file:/home/jenkins/.m2/repository/com/thoughtworks/xstream/xstream/1.3.1/xstream-1.3.1.jar
urls[11] = file:/home/jenkins/.m2/repository/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar
urls[12] = file:/home/jenkins/.m2/repository/org/codehaus/plexus/plexus-utils/3.0/plexus-utils-3.0.jar
urls[13] = file:/home/jenkins/.m2/repository/org/apache/maven/shared/maven-filtering/1.0-beta-2/maven-filtering-1.0-beta-2.jar
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]