private void rebalance(final Cache cache) {
    if (isRebalancing()) {
      cache.getResourceManager().createRebalanceFactory().start();
    }
  }
Causes a rebalance operation to occur on the given Cache.

@param cache the reference to the Cache to rebalance.
@see ResourceManager#createRebalanceFactory()
geode-core/src/main/java/org/apache/geode/distributed/ServerLauncher.java