Maven error on the XWiki project

[INFO] [sonar-core:batch]
[ERROR] Cannot execute the command org.codehaus.sonar:sonar-core-maven-plugin:1.3-SNAPSHOT:batch
org.apache.maven.lifecycle.LifecycleExecutionException: Error occured when triggering measures calculation job on remote server
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:564)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:493)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:463)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:224)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
at ch.hortis.sonar.mvn.SonarMavenEmbedder.execute(SonarMavenEmbedder.java:151)
at ch.hortis.sonar.mvn.SonarMojo.executeMaven(SonarMojo.java:242)
at ch.hortis.sonar.mvn.SonarMojo.executeGoals(SonarMojo.java:225)
at ch.hortis.sonar.mvn.SonarMojo.execute(SonarMojo.java:110)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:447)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:493)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:463)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:224)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error occured when triggering measures calculation job on remote server
at ch.hortis.sonar.mvn.BatchLaunchMojo.doExecute(BatchLaunchMojo.java:80)
at ch.hortis.sonar.mvn.CoreMojo.execute(CoreMojo.java:121)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:447)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
... 27 more
Caused by: org.apache.maven.plugin.MojoExecutionException: Unable to find module hsqldb in reactor projects
at ch.hortis.sonar.mvn.BatchLaunchMojo.saveSnapshotHierarchyModules(BatchLaunchMojo.java:144)
at ch.hortis.sonar.mvn.BatchLaunchMojo.processSnapshot(BatchLaunchMojo.java:123)
at ch.hortis.sonar.mvn.BatchLaunchMojo.saveSnapshotHierarchyModules(BatchLaunchMojo.java:146)
at ch.hortis.sonar.mvn.BatchLaunchMojo.processSnapshot(BatchLaunchMojo.java:123)
at ch.hortis.sonar.mvn.BatchLaunchMojo.processSnapshots(BatchLaunchMojo.java:105)
at ch.hortis.sonar.mvn.BatchLaunchMojo.doExecute(BatchLaunchMojo.java:68)
... 30 more
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Cannot execute the command org.codehaus.sonar:sonar-core-maven-plugin:1.3-SNAPSHOT:batch