Hello,


Recently we have been seeing 504 errors on the ELB status logs (AWS) for 
Jenkins. When investigated, we came to know that, to keep the page on 
browser in sync with latest information, the browser keeps on polling data 
using ajaxBuildQueue and ajaxExecutors endpoints. When the logs for these 
requests and their responses are observed, we saw that intermittently 504 
errors are popping up. This tripped our thresholds for 5xx errors. We want 
to know how to eradicate the 504s as it might also impacts performance if 
we start to see more of these errors.


When observed, we found 26 of the 504s on the logs over a period of 15 
mins. While many of the requests land on ELB one after the other, only one 
out of 10 subsequent requests to the mentioned endpoints produced the 504s.

 

Not sure if this is related to performance tuning where in we tune the 
thresholds in configuration somewhere or is it something to do with jenkins 
itself. Any suggestions are highly appreciated.


Regards,
Prasad Velidi

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