private PoolFactory createPoolFactory() {
    return PoolManager.createFactory().setMinConnections(3)
        .setSubscriptionEnabled(true).setSubscriptionRedundancy(0).setReadTimeout(10000)
        .setSocketBufferSize(32768);
  }
Create client cache and return the client connection pool's primary server port
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/ClientWithInterestFailoverDistributedTest.java