title: Gradle + FindBugs, ignore "missing classes"
body: <p>I am using a Gradle script to build my Java project. I have the FindBugs plugin added.</p>
  
  <p>I often get errors such as "The following classes needed for analysis were missing" for Java internal classes. I'm fine with them missing, since they are not what I want to test anyway.</p>
  
  <p>The problem is that this is qualified as an error, which breaks Arcanist (and therefore breaks CI tests). I want to ignore this error.</p>
  
  <p>Based on the <a href="https://docs.gradle.org/current/dsl/org.gradle.api.plugins.quality.FindBugs.html" rel="nofollow noreferrer">Gradle FindBugs plugin manual</a> I see the <code>excludeFilter</code> parameter which led me to <a href="http://findbugs.sourceforge.net/manual/filter.html#d0e1930" rel="nofollow noreferrer">the FindBugs manual on filters</a>, which led me to <a href="http://findbugs.sourceforge.net/bugDescriptions.html" rel="nofollow noreferrer">the list of bugs</a> but I cannot find the "missing classes" on the list...</p>
  
  <p>Simply put, I'm searching for a way to ignore the "The following classes needed for analysis were missing".</p>
  
  <p>As a bonus, I would like to hide only the error for JDK classes and not for my own. This part was already asked by <a href="https://stackoverflow.com/questions/26149462/findbugs-ignore-some-missing-classes-but-report-others">this question</a>, but it is unanswered as of now.</p>