public static JMeterHTablePool getinstancePool(Configuration config,
			int poolSize, byte[] tableName, final boolean autoFlush,
			final long writeBufferSize) {
		if (instancePool == null) {
			synchronized (JMeterHTablePool.class) {
				if(instancePool == null ){
					System.out.println("Pool instance");
				instancePool = new JMeterHTablePool(config, poolSize, tableName, autoFlush,
						writeBufferSize);
				}
			}
		}
		return instancePool;
	}