string(228) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=sap%E8%B7%9Ferp%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB => Failed to connect to 101.89.159.206 port 38087: Connection refused"
sap跟erp有什么关系
