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