I am getting below error while building project with Sonarqube:

The following errors occurred during analysis:
  Exception analyzing com.org.client.employee.EmployeeClient using detector com.h3xstream.findsecbugs.spring.SpringEntityLeakDetector
  java.lang.NullPointerException
  At com.h3xstream.findsecbugs.spring.SpringEntityLeakDetector.analyzeMethod(SpringEntityLeakDetector.java:107)
  At com.h3xstream.findsecbugs.spring.SpringEntityLeakDetector.visitClassContext(SpringEntityLeakDetector.java:68)
  At edu.umd.cs.findbugs.DetectorToDetector2Adapter.visitClass(DetectorToDetector2Adapter.java:76)
  At edu.umd.cs.findbugs.FindBugs2.analyzeApplication(FindBugs2.java:1080)
  At edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:281)
  At org.sonar.plugins.findbugs.FindbugsExecutor$FindbugsTask.call(FindbugsExecutor.java:235)
  At java.util.concurrent.FutureTask.run(FutureTask.java:266)
  At java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  At java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  At java.lang.Thread.run(Thread.java:748)

I am trying to exclude client directory from sonar coverage but looks like exclusion is not working:

property "sonar.coverage.exclusions", "**/client/**"

Below are the version I am using:

SonarQube - 7.9
Gradle - 4.9
Spring Boot - 2.1.3
Java - Jdk8