title: SonarQube 5.3 Background Task Fails with No Log in Dashboard
body: <p>I know this is similar to <a href="https://stackoverflow.com/questions/34687419/sonarqube-5-2-background-tasks-sometimes-fail-with-no-log">sonarqube 5.2 background tasks sometimes fail with no log</a> - however I cannot comment (due to lack of reputation points) to add some more information, so tried adding this post as an answer, but had it deleted by the moderators...</p>
  
  <p>I was having a problem with <code>SonarQube 5.2</code>, and now 5.3 following an upgrade yesterday. I have tried upping the logging to TRACE on the server, and enabling sonar.verbose=true on the project itself.</p>
  
  <p>However, there is no extra information in the output from the maven build - just the normal:</p>
  
  <p>ANALYSIS SUCCESSFUL, you can browse xxx in the build logs.</p>
  
  <p>I do see a POST <code>/api/ce/submit?projectKey=xxxx&amp;projectName=yyyy | time=757ms</code> in the server log files - but nothing further.</p>
  
  <p>I also see a zip file in <code>data\ce\reports</code> with a name matches the id in build log (eg: AVI19fDPpe3MLWoccJn9.zip)</p>
  
  <p>However - I get intermittent failures on the background tasks screen - with no log link in the background tasks screen, and no logs in <code>data\ce\logs\reports</code> directory created.</p>
  
  <p>I resorted to re-building the sonarqube database from scratch for 5.3 (as we had no history anyway) - and the error was still happening.</p>
  
  <p>I am using:</p>
  
  <ul>
  <li>Oracle DB on a fresh <code>sonarqube 5.3</code> install</li>
  <li>Plugins:
  
  <ul>
  <li>sonar-java-plugin-3.9</li>
  <li>sonar-ldap-plugin-1.5.1</li>
  <li>sonar-scm-perforce-plugin-1.3 (although currently have <code>sonar.scm.disabled=true</code> as we had problems in the previous version)</li>
  <li>sonar-csharp-plugin-4.3 (not relevant for this java analysis)</li>
  <li>sonar-scm-git-plugin-1.1 (not relevant for this analysis)</li>
  <li>sonar-scm-svn-plugin-1.2 (not relevant for this analysis)</li>
  </ul></li>
  <li>I'm building a Maven project using <code>sonar-jacoco-listeners v 3.2</code> (have also tried 2.9.1)</li>
  </ul>