private int createServerCache() throws IOException {
    cacheRule.createCache();

    RegionFactory<String, String> rf = cacheRule.getCache().createRegionFactory(REPLICATE);
    rf.setConcurrencyChecksEnabled(false);
    rf.create(regionName);

    CacheServer server1 = cacheRule.getCache().addCacheServer();
    server1.setPort(0);
    server1.start();
    return server1.getPort();
  }
Client queue size statistic should not go negative when client goes offline.

<p>
TRAC #48571: CacheClientProxy.getQueueSizeStat() gives negative numbers when client goes down.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HARegionQueueSizeRegressionTest.java