- 中文版
- Release Notes
- 产品介绍
- 使用指南
- 指标说明
- 脚本录制器
- 常见问题
- 功能分析
- 错误分析
- 服务器连接被重置
- 打开流媒体失败
- 404 - Not Found错误
- 页面任务元素出现阻塞时间的分析思路
- 无法解析域名和服务器地址
- 无法解析服务器名称或地址
- 无法解析服务器名称或地址
- 无法解析服务器名称或地址
- 无法解析服务器名称或地址
- 无法与服务器建立连接
- 无法与服务器建立连接
- 无法与服务器建立连接
- 无法与服务器建联连接
- 操作超时
- 操作超时之Chrome90
- 任务超时
- 私有化平台页面访问报-100错误
- 与服务器连接被重置
- 与服务器连接被重置
- 应用的证书无效
- 应用证书无效
- 安全频道支持出错
- 安全频道支持出错
- 打开流媒体失败
- 打开流媒体失败
- 证书错误
- 安全频道支持出错
- HTTP/1.1 403 Forbidden
- 与服务器建立连接失败
- HTTP412错误
- 应用证书无效
- 任务超时
- 元素报表数值对不上
- 数据分析
- 如何区分HLS格式是直播还是点播
- 报表数据与客户服务器端统计不一致
- DNS时间过长的分析思路
- 绑定对比任务的消耗点数不同
- 4G真机监测下客户反馈http via不正确
- 节点IP定位不准确
- 私有化平台任务无数据
- CDN厂商CNAME无响应问题
- 单文件下载任务， 创建后无数据
- SSL握手时间长
- 监控数据量少，和节点组频率对应不上
- 跨省跨运营商现象分析
- 流媒体任务，三个任务数据量相差较大
- 相同文件下载，不同厂商字节数下载不同
- 单文件下载，配置MD5，下载不全未报错。
- DNS时间较长问题分析
- PING任务警告，Request timed out
- PING任务丢包百分之百
- 元素瀑布图中有重复元素加载
- 散点数据和抓包数据对不上
- 抓包中如何查看传输的内容
- 任务无数据/数据少
- 相同URL，额外等待时间影响onload时间
- 听云监测数据和浏览器访问数据总下载字节数相差较大
- DNS时间较长
- 跨运营商访问
- 页面任务元素出现阻塞时间
- 抓包中出现TCP ZERO window
- 报表权限
- 节点分析
- 告警分析
- 问题百问
- English
- Release-Notes
- Product-Introduction
- Working-Principle
- Typical-Use-Cases
- IPv6 Support Rate Monitoring
- Website Performance Evaluation and Optimization
- Website Application Pressure Testing Analysis
- SMS Service Quality Monitoring
- WHOIS Domain Monitoring
- VPN Quality Monitoring
- Enterprise Business Quality Monitoring
- WiFi Quality Monitoring
- End-to-End Scenario Monitoring
- MTR Network Link Monitoring
- Website Benchmarking Analysis
- API Active Monitoring
- Certificate Monitoring
- CDN Acceleration Evaluation and Selection
- Observable Hybrid Pressure Testing
- DNS Hijacking Monitoring - CNAME Monitoring
- Product-Overview
- Product-Architecture
- Core-Advantages
- Feature-Modules
- Metrics-Reference
- User-Guide
- Script-Recorder
- FAQ
- Error-Analysis
- 404 - Not Found Error
- Open Streaming Media Failed
- Application Certificate Invalid (Additional Scenarios)
- Certificate Error (Additional Scenarios)
- Cannot Resolve Server Name or Address (Additional Scenarios)
- Element Report Value Mismatch
- Server Connection Reset (Additional Scenarios)
- Secure Channel Support Error (Advanced Troubleshooting)
- HTTP 403 Forbidden
- Open Streaming Media Failed (Additional Scenarios)
- Cannot Resolve Server Name or Address
- Secure Channel Support Error (Additional Scenarios)
- Certificate Error
- Cannot Resolve Server Name (Additional Scenarios)
- HTTP 403 Forbidden (Additional Scenarios)
- Application Certificate Invalid
- Private Platform Page Access Error -100
- Private Platform Page Access Error -100 (Additional Scenarios)
- Operation Timeout - Chrome 90 Specific
- Task Timeout
- Task Timeout (Additional Scenarios)
- Application Certificate Invalid (Additional Scenarios)
- Connection Reset by Server
- Server Connection Reset
- Cannot Establish Connection (Additional Scenarios)
- Secure Channel Support Error
- Element Report Value Mismatch (Additional Scenarios)
- Cannot Establish Connection with Server (Additional Scenarios)
- HTTP 412 Error
- Task Timeout (Additional Scenarios)
- Operation Timeout
- Connection with Server Failed
- Cannot Resolve Domain Name and Server Address
- Cannot Establish Connection with Server
- Element Report Value Mismatch (Additional Scenarios)
- Node-Analysis
- Alert-Analysis
- Feature-Analysis
- Streaming Media Task - No Data After Configuration
- Platform Support for Checking "Whether Specified CNAME is Effective"
- Copy Task - Binding Cannot Be Done
- Bind Host Not Effective - Host IP Outside List Appears (Additional Scenarios)
- Advanced Parameters - End Conditions
- Private Protocol Socket (TCP/UDP)
- Different Task Types, Same IP, Different Resolution Results
- Create Task - Detailed Guide
- Advanced Parameters - Diagnostics
- TingYun Monitoring vs Browser Access Data Mismatch
- Create Node Group - Troubleshooting
- Report No Data - Verify Node DNS Function
- Create Task
- Physical Device Task Download Crash
- Instant Monitoring IPv6 Page Level Explanation
- Monitoring Address Incomplete Error
- Bind Host Not Effective - Host IP Outside List Appears
- Problem-QA
- Data-Analysis
- Element Blocking Time in Page Task
- Node IP Geolocation Inaccurate
- Long SSL Handshake Time
- Repeated Element Loading in Waterfall Chart
- How to Distinguish HLS Live vs VOD
- Low Monitoring Data Volume - Doesn't Match Node Group Frequency
- Cross-ISP Access Analysis
- Long DNS Time Analysis
- Task No Data / Less Data
- CDN Provider CNAME No Response
- Single File Download Task - No Data After Creation
- DNS Time Long
- Report Data vs Server Statistics Mismatch
- Long DNS Time Troubleshooting Guide
- 4G Physical Device Monitoring - HTTP Via Incorrect
- DNS Time Long Troubleshooting Guide
- How to View Transferred Content in Packet Capture
- Bound Task Point Consumption Difference
- Cross-Province Cross-ISP Phenomenon Analysis
- TCP Zero Window in Packet Capture
- Same File Download - Different Vendors Different Byte Count
- TingYun Monitoring Data vs Browser Download Bytes Difference
- Single File Download - MD5 Configured but Download Incomplete No Error
- DNS Time Long
- Task No Data / Less Data
- Single File Download Task - No Data After Creation
- Ping Task 100% Packet Loss
- Same URL, Extra Wait Time Affects Onload Time
- Private Platform Task No Data
- Streaming Media Task - Three Tasks Data Variance
- Ping Task Alert: Request Timed Out
- Scatter Data vs Packet Capture Mismatch
- Error-Analysis
DNS时间较长
问题描述#
线上任务
排查思路#
1.客户任务中URL，节点复现
复现，指定了202.138.120.86 发现DNS时间依旧很长。
2.通过抓包来查看该地区DNS的任务数据
从测www.google.com，www.facebook.com 抓包的解析情况来看dns服务器“103.253.154.74”完全处于不可用的状态，没响应过任何A记录解析的请求
通过上述的数据，DNS时间依旧很慢，说明该地区的DNS解析确实很慢，并不是客户的问题，即便是更换该地区其他DNS也是相同的问题
问题总结#
1.更换节点DNS是否可以？
如果有问题，可以反馈个节点组更换节点的DNS，但是不能指定，只能节点组评估该地区可用性较高的DNS，因为该节点不只为一个任务服务。
在和客户沟通这个问题的时候，客户希望指定8.8.8.8或者8.8.4.4，这种是不行的，不能使用。
2.是否可以在持续监测中指定DNS
这个是需求问题，已在排期处理