Provisional Headers are shown in all browsers of clients:
Check the page triggered by the request to see if there is a form submission and Ajax request triggered at the same time, for example: define a button, type is submit, and define an Ajax event for the button; This scenario is one that has occurred in our previous development process
2. The browser of some clients is displayed
// Net_internals /#events // Net_internals /#events // net_internals /#events Check to see if the delegate_BlocKED_BY keyword exists; This is usually due to browser-side plug-ins or client-side software blocking the request; In our case, we are blocked by the WebSense endpoint; If this is the case, you can basically ignore the problems of the client itself; Consider uninstalling the plug-in or software and trying again to see if it still appears. If it still occurs, please see if it belongs to the following situation
3. All clients occasionally have this error
If this is the case, it is often a server-side problem
Processing method: Check based on the deployment architecture; Such as: Nginx —-> gateway application —-> F5 load balancer —-> Application server (Docker) Call the lowest level application server first (if you are afraid of insufficient pressure, you can multithreaded pressure); Press up in turn; In the process of pressure measurement, you can see in real time, whether there will be a request stuck; If found, it is most likely to be the problem at this layer: at present, we encounter two cases, one is the F5 layer, some requests fail to load balance to the application server; There is also a situation where the Nginx level is stuck;
Solution: The load balancing policy at F5 layer is changed from Performance L4 to Standard. Nginx layer stuck situation solution: this situation has not actually participated in, understand the situation is to modify a lot of nginx configuration is not effective, finally directly kill reinstall good, so also did not find the key point ———————
Author: Starsnow123 original address
Reference: blog.csdn.net/xinshangsha…