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Thursday, December 1, 2016

Resolving 504 Gateway Timeout Issues

AWS ELB gives two matrix which can help in diagnosing [5XX Errors]  issue and identify the possible root cause causing the Errors:

Matrix : “Sum HTTP 5XXs”   :  5XX Reponses given by Service [Due to no availability/failure of DB, S3, MQ etc]
Matrix :  “Sum ELB 5XXs”  :  5XX Response given by ELB [when idletime out expires while waiting for response from Tej Service (504), failure in ELB itself (503) ]

                                  Common reason for idle timeout on ELB is long running DB query or some application bug, performance tuning issues with micro service.

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