调用短信接口报错

本地开发环境调用短信接口，可以正常发送。
部署到ECS服务器则报错：
com.aliyuncs.exceptions.ClientException: SDK.ServerUnreachable : SocketTimeoutException has occurred on a socket read or accept.

at com.aliyuncs.DefaultAcsClient.doAction(DefaultAcsClient.java:221)
at com.aliyuncs.DefaultAcsClient.doAction(DefaultAcsClient.java:169)
at com.aliyuncs.DefaultAcsClient.doAction(DefaultAcsClient.java:60)
at com.aliyuncs.DefaultAcsClient.getAcsResponse(DefaultAcsClient.java:104)