private Semaphore getVolunteeringSemaphore() {
    return regionAdvisor.getVolunteeringSemaphore();
  }
Returns the semaphore which controls the number of threads allowed to consume from the
{@link #getVolunteeringQueue volunteering queue}.

@return the semaphore which controls the number of volunteering threads
geode-core/src/main/java/org/apache/geode/internal/cache/BucketAdvisor.java