@Override
      public Object call() throws Exception {
        getCache().getLogger().fine(addExpectedExString);
        getCache().getInternalResourceManager().getHeapMonitor()
            .updateStateAndSendEvent(950, "test");
        HeapMemoryMonitor.setTestBytesUsedForThresholdSet(950);
        getCache().getLogger().fine(removeExpectedExString);
        return null;
      }
Starts up a CacheServer.

@return a {@link ServerPorts} containing the CacheServer ports.
geode-core/src/distributedTest/java/org/apache/geode/cache/management/MemoryThresholdsDUnitTest.java