[INFO] Sonar server can not be reached. Please check the parameter 'sonar.host.url': http://null:9000
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Sonar server can not be reached. Please check the parameter 'sonar.host.url': http://null:9000
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:284)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
    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:597)
    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: Sonar server can not be reached. Please check the parameter 'sonar.host.url': http://null:9000
    at org.codehaus.mojo.sonar.ServerMetadata.connect(ServerMetadata.java:67)
    at org.codehaus.mojo.sonar.SonarMojo.execute(SonarMojo.java:85)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
    ... 17 more

<profile>
  <id>sonar</id>
  <activation>
  <activeByDefault>true</activeByDefault>
 </activation>
  <properties>
  <sonar.jdbc.url>jdbc:postgresql://localhost/sonar</sonar.jdbc.url>
  <sonar.jdbc.driver>org.postgresql.Driver</sonar.jdbc.driver>
  <sonar.jdbc.username>user</sonar.jdbc.username>
  <sonar.jdbc.password>password</sonar.jdbc.password>
  <!-- SERVER ON A REMOTE HOST -->
  <sonar.host.url>http://localhost:9000</sonar.host.url>
  </properties>
</profile>