Sonar - OutOfMemoryError: Java heap space

Question

I am deploying a large Java project on Sonar using "Findbugs" as profile and getting the error below:

Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space 

What i have tried to resolve this:

1. Replaced %SONAR_RUNNER_OPTS% with -Xms256m -Xmx1024m to increase the heap size in sonar-runner bat file.
2. Put "sonar.findbugs.effort" parameter as "Min" in Sonar global parameters.

But both of above methods didn't work for me.

Answer 1

I had the same problem and found a very different solution, perhaps because I'm having a hard time swallowing the previous answers / comments. With 10 million lines of code (that's more code than is in an F16 fighter jet), if you have a 100 characters per line (a crazy size), you could load the whole code base into 1GB of memory. I set it 8GB of memory and it still failed. Why?

Answer: Because the community Sonar C++ scanner seems to have a bug where it picks up ANY file with the letter 'c' in its extension. That includes .doc, .docx, .ipch, etc. Hence, the reason it's running out of memory is because it's trying to read some file that it thinks is 300mb of pure code but really it should be ignored.

Solution: Find the extensions used by all of the files in your project (see more here):

dir /s /b | perl -ne 'print $1 if m/\.([^^.\\\\]+)$/' | sort -u | grep c 

Then add these other extensions as exclusions in your sonar.properties file:

sonar.exclusions=**/*.doc,**/*.docx,**/*.ipch 

Then set your memory limits back to regular amounts.

%JAVA_EXEC% -Xmx1024m -XX:MaxPermSize=512m -XX:ReservedCodeCacheSize=128m %SONAR_RUNNER_OPTS% ...