@Override
  public PoolFactory setPingInterval(long pingInterval) {
    if (pingInterval <= 0) {
      throw new IllegalArgumentException("pingInterval must be greater than zero");
    }
    attributes.pingInterval = pingInterval;
    return this;
  }
The cache that created this factory
geode-core/src/main/java/org/apache/geode/internal/cache/PoolFactoryImpl.java