title: sonar findbugs heap size
body: <p>i am new to sonar. i am running sonar from Jenkins with sonar pulgin.</p>
  
  <p>When i am running from jenkins  i am getting  out of memory exception at findbugs</p>
  
  <p>below is the error:</p>
  
  <pre><code> Out of memory
  Total memory: 1037M
   free memory: 30M
  Analyzed: D:\Victor\autocreated\webapp\WEB-INF\classes
       Aux: C:\DOCUME~1\NADBHA~1\LOCALS~1\Temp\findbugs4165854405681394173.jar
       Aux: C:\DOCUME~1\NADBHA~1\LOCALS~1\Temp\findbugs4688505485649811865.jar
  Total time: 2:04:49.155s
  Final Memory: 358M/989M
  Exception in thread "main" org.sonar.batch.bootstrapper.BootstrapException: org.sonar.api.utils.SonarException: Can not execute Findbugs
      at org.sonar.runner.Runner.delegateExecution(Runner.java:189)
      at org.sonar.runner.Runner.execute(Runner.java:78)
      at org.sonar.runner.Main.main(Main.java:61)
  Caused by: org.sonar.api.utils.SonarException: Can not execute Findbugs
      at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:120)
      at org.sonar.plugins.findbugs.FindbugsSensor.analyse(FindbugsSensor.java:58)
      at org.sonar.batch.phases.SensorsExecutor.execute(SensorsExecutor.java:64)
      at org.sonar.batch.phases.Phases.execute(Phases.java:93)
      at org.sonar.batch.bootstrap.ProjectModule.doStart(ProjectModule.java:143)
      at org.sonar.batch.bootstrap.Module.start(Module.java:83)
      at org.sonar.batch.bootstrap.BatchModule.analyze(BatchModule.java:111)
      at org.sonar.batch.bootstrap.BatchModule.doStart(BatchModule.java:101)
      at org.sonar.batch.bootstrap.Module.start(Module.java:83)
      at org.sonar.batch.bootstrap.BootstrapModule.doStart(BootstrapModule.java:102)
      at org.sonar.batch.bootstrap.Module.start(Module.java:83)
      at org.sonar.batch.Batch.execute(Batch.java:100)
      at org.sonar.runner.Launcher.executeBatch(Launcher.java:65)
      at org.sonar.runner.Launcher.execute(Launcher.java:58)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.sonar.runner.Runner.delegateExecution(Runner.java:186)
      ... 2 more
  Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
      at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at org.sonar.plugins.findbugs.FindbugsExecutor.execute(FindbugsExecutor.java:112)
      ... 20 more
  Caused by: java.lang.OutOfMemoryError: Java heap space
  </code></pre>
  
  <p>my sonar version is 2.13</p>
  
  <p>when i am increasing the jvm options in Jenkins sonar plugin  to 1280 it is shown below error:</p>
  
  <pre><code>Error occurred during initialization of VM
  Could not reserve enough space for object heap
  Error: Could not create the Java Virtual Machine.
  Error: A fatal exception has occurred. Program will exit`enter code here`
  </code></pre>