问通用ocr 返回 -3 ？？

通用ocr返回 -3 异常是超时，请问下 这是怎么回事？

{"code":-3,"message":"HttpRequest:url:http://recognition.image.myqcloud.com/ocr/general, method:POST, ConentType:multipart/form-data\nHeaders:\nkey:Authorization, value:ehMtjcpbvpnFx7Tqp5x4LgSWpBhhPTEyNTE2OTcwODEmYj10ZXN0MSZrPUFLSUQ3RUF5ZDdaYWFQMlVscXNxaU90Q0tJNWg5UFVOSWN4QiZ0PTE1MzczNDQwOTcmZT0xNTM3MzQ0Mzk3\nparams:\nkey:appid, value:1251697081\nkey:bucket, value:test1\n, []\nException:java.net.SocketTimeoutException: Read timed out"}