protected CacheSerializableRunnable setStopFlag() {
    CacheSerializableRunnable setFlag = new CacheSerializableRunnable("setFlag") {
      @Override
      public void run2() throws CacheException {
        isStop = true;
      }
    };

    return setFlag;
  }
This function creates regionqueue on 4 VMs
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HAGIIBugDUnitTest.java