TCP socket timeout












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I'm using Ubuntu 18.04.2LTS. I make a HTTP request to the unavailable service, and it waits exactly 130s to timeout.



I searched a bit and if I understand correctly the only parameter controlling this timeout (from the system/Ubuntu/linux level, thus not accounting for any possible application defined HTTP timeout) is: tcp_syn_retries (http://manpages.ubuntu.com/manpages/bionic/man7/tcp.7.html).



If this is correct, what is the algorithm on how this setting defines the timeout? (As I found different resources online with different answers, if possible back up answer by some official Linux/Ubuntu documentation)



NOTE: tcp_syn_retries was 6 by default on my PC, which is different default than written in the above document stating that the default is 5 giving the timeout of around 180 seconds.










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    0















    I'm using Ubuntu 18.04.2LTS. I make a HTTP request to the unavailable service, and it waits exactly 130s to timeout.



    I searched a bit and if I understand correctly the only parameter controlling this timeout (from the system/Ubuntu/linux level, thus not accounting for any possible application defined HTTP timeout) is: tcp_syn_retries (http://manpages.ubuntu.com/manpages/bionic/man7/tcp.7.html).



    If this is correct, what is the algorithm on how this setting defines the timeout? (As I found different resources online with different answers, if possible back up answer by some official Linux/Ubuntu documentation)



    NOTE: tcp_syn_retries was 6 by default on my PC, which is different default than written in the above document stating that the default is 5 giving the timeout of around 180 seconds.










    share|improve this question



























      0












      0








      0








      I'm using Ubuntu 18.04.2LTS. I make a HTTP request to the unavailable service, and it waits exactly 130s to timeout.



      I searched a bit and if I understand correctly the only parameter controlling this timeout (from the system/Ubuntu/linux level, thus not accounting for any possible application defined HTTP timeout) is: tcp_syn_retries (http://manpages.ubuntu.com/manpages/bionic/man7/tcp.7.html).



      If this is correct, what is the algorithm on how this setting defines the timeout? (As I found different resources online with different answers, if possible back up answer by some official Linux/Ubuntu documentation)



      NOTE: tcp_syn_retries was 6 by default on my PC, which is different default than written in the above document stating that the default is 5 giving the timeout of around 180 seconds.










      share|improve this question
















      I'm using Ubuntu 18.04.2LTS. I make a HTTP request to the unavailable service, and it waits exactly 130s to timeout.



      I searched a bit and if I understand correctly the only parameter controlling this timeout (from the system/Ubuntu/linux level, thus not accounting for any possible application defined HTTP timeout) is: tcp_syn_retries (http://manpages.ubuntu.com/manpages/bionic/man7/tcp.7.html).



      If this is correct, what is the algorithm on how this setting defines the timeout? (As I found different resources online with different answers, if possible back up answer by some official Linux/Ubuntu documentation)



      NOTE: tcp_syn_retries was 6 by default on my PC, which is different default than written in the above document stating that the default is 5 giving the timeout of around 180 seconds.







      networking kernel tcp-ip






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      share|improve this question













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      edited Mar 12 at 8:17







      croraf

















      asked Mar 12 at 7:30









      crorafcroraf

      138114




      138114






















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