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Check the application log for error or warning logs in the vicinity of the 502 error.
Also, is there a heavy load or a large number of accesses to EC2 or RDS during the time period when the 502 error occurred?
Check the application log for error or warning logs in the vicinity of the 502 error.
Also, is there a heavy load or a large number of accesses to EC2 or RDS during the time period when the 502 error occurred?
looks like during the heavy load,but cpu utilization is only 25%,database connection also less than 10
What applications are you running on EC2? Please also provide information about the web server you are using and other information.