Failed to establish connection with server

Problem description

The customer page tasks started to drop at 13:00 Availability. Please check the reason.

Problem analysis

(1) View the impact AvailabilityError, the main Error is: Unable to establish connection with the server (page)

(2) Instant Testing reappeared and found that there were still errors.

(3) Check the packet capture data. The client has been sending TCP connection establishment packets, but the server has not responded. As for whether the server has not sent it or has sent it and lost it on the road, the client does not know.

(4) Check the corresponding trace information and find that problems occur on the link 221.131.196.186. This IP is found to be from Huzhou, Zhejiang, and is biased towards Network over Host.

(5) In summary, the problem is the HostNetwork problem of 111.X.X.201

Problem feedback

There was a problem with the Host at 111.

Judging from the packet capture, the client sent it, but it is unclear whether the server did not send it or sent it and lost it on the road;

Judging from the trace, it is all a problem with the intermediate link 221.131.196.186. This IP is found to be from Huzhou, Zhejiang, and it is biased towards Network on the Host side;

In summary, the problem is the HostNetwork problem of 111.X.X.201;
Summarize the above phenomenon and feedback it to the customer, and check the HostNetwork situation within the corresponding time period.

Failed to establish connection with server

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Problem description

Problem analysis

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