title: jacoco-maven-plugin/Sonar Scanner - "Coverage by Test" info not present in merged jacoco report (jacoco-overall.exec)
body: <p>I have been trying to solve an issue with combined reports coverage for some time now, and I can't seem to find any useful information that's relevant to my particular issue.</p>
  
  <p>Implementation Details:</p>
  
  <ul>
  <li>SonarQube (v5.4)</li>
  <li>jacoco-maven-plugin (v0.7.9)</li>
  <li>sonar-jacoco-listener (v2.8)</li>
  <li>SonarQube Scanner for Jenkins (v2.8)</li>
  <li>maven-surefire-plugin (v2.16) </li>
  <li>maven-failsafe-plugin (v2.18.1)</li>
  <li>junit (v4.12)</li>
  </ul>
  
  <p>I have jacoco-maven-plugin configured and properly generating both unit and integration test reports, including coverage by test via the sonar-jacoco-listener module. </p>
  
  <p>However, when the SonarQube Scanner for Jenkins (v2.8) performs its analysis, a sensor called JacocoOverallSensor checks a third file, jacoco-overall.exec, which does NOT have coverage by test information in it. </p>
  
  <p>As a result, I do not actually get any Coverage by Test information rendered in the SonarQube Coverage tab for my project at all, only lines and conditions per class.</p>
  
  <p>Example output from Scanner:</p>
  
  <pre><code>INFO: Sensor SurefireSensor
  INFO: parsing /var/lib/jenkins/workspace/evo-sonar-test/target/junit-reports
  INFO: Sensor SurefireSensor (done) | time=160ms
  INFO: Sensor JaCoCoSensor
  INFO: Analysing /var/lib/jenkins/workspace/evo-sonar-test/target/jacoco/jacoco-unit.exec
  INFO: Information about coverage per test has been collected.
  INFO: Sensor JaCoCoSensor (done) | time=887ms
  INFO: Sensor JaCoCoItSensor
  INFO: Analysing /var/lib/jenkins/workspace/evo-sonar-test/target/jacoco/jacoco-itest.exec
  INFO: Information about coverage per test has been collected.
  INFO: Sensor JaCoCoItSensor (done) | time=365ms
  INFO: Sensor JaCoCoOverallSensor
  INFO: Analysing /var/lib/jenkins/workspace/evo-sonar-test/target/jacoco/jacoco-unit.exec
  INFO: Analysing /var/lib/jenkins/workspace/evo-sonar-test/target/jacoco/jacoco-itest.exec
  INFO: Analysing /var/lib/jenkins/workspace/evo-sonar-test/.sonar/jacoco-overall.exec
  INFO: No information about coverage per test.
  INFO: Sensor JaCoCoOverallSensor (done) | time=333ms
  </code></pre>
  
  <p>Based on my understanding from looking at the package/classes for JacocoOverallSensor, this jacoco-overall.exec is supposed to be a merged copy of the integration and unit jacoco reports generated. The jacoco-overall.exec file is getting created and is populated with data, meaning a merge of my unit/integration tests is happening, but it appears that only the Coverage by Test information is missing from this file. </p>
  
  <p>At this point, I'm stumped as to why this is. I've searched and searched, but I can't seem to find anyone who ONLY has an issue with coverage by test in jacoco-overall.exec and not in the unit/integration exec files as well. </p>
  
  <p>Questions: </p>
  
  <ul>
  <li>Is there some configuration value I'm missing that allows unit/integration Coverage By Test information to be merged in the jacoco-overall.exec?</li>
  <li>Is a merge of the two reports even necessary (and can I somehow turn
  merging off in the Sonar Scanner)? All I ultimately need out of my
  setup is to be able to view coverage by test for unit and integration
  tests respectively - overall combined coverage isn't needed at this
  time.</li>
  </ul>
  
  <p>For reference, my sonar configuration (configured in Sonarqube Scanner for Jenkins):</p>
  
  <pre><code># Data locations to be analyzed
  sonar.sources=src/main
  sonar.tests=src/test
  sonar.java.binaries=target/classes
  sonar.java.libraries=target/libs
  sonar.java.test.binaries=target/test-classes
  sonar.java.test.libraries=target/libs
  sonar.junit.reportsPath=target/junit-reports
  
  # Compiler configuration
  sonar.java.source=1.7
  sonar.language=java
  sonar.sourceEncoding=UTF-8
  
  # Jacoco configuration
  sonar.java.coveragePlugin=jacoco
  sonar.jacoco.reportMissing.force.zero=true
  sonar.jacoco.reportPath=target/jacoco/jacoco-unit.exec
  sonar.jacoco.itReportPath=target/jacoco/jacoco-itest.exec
  </code></pre>
  
  <p>I'd be happy to post more information on request, but at this point I'm so lost/cross-eyed in the sea of information about this topic that I'm not sure what else would be helpful for people. Ask and you shall receive.</p>