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krzysztof.kujawski.1 avatar image
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Is there limitation on post msg size or field size using Websocket API?

I have created a record in ATS (RIC and field names masked:):

Description in ats.dico file

*SOME_RIC admin None AA DEFAULT DEFAULT DEFAULT RESET 08/12/2031 08/12/2021 NONE NONE

v STR_T SOME_RIC.FLD1 STATIC_CONTRIB[]

v STR_T SOME_RIC.FLD2 STATIC_CONTRIB[]

v STR_T SOME_RIC.FLD3 STATIC_CONTRIB[]

v STR_T SOME_RIC.GN_TXT32_3 STATIC_CONTRIB[]

v STR_T SOME_RIC.GUID STATIC_CONTRIB[]


There are custom fields used that are properly set RDMFieldDictionary (also masked for the purpose of this question):

FLD1 "FLD1" -4001 NULL ALPHANUMERIC 40000 RMTES_STRING 40000

FLD2 "FLD2" -4011 NULL ALPHANUMERIC 2000 RMTES_STRING 2000

FLD3 "FLD3" -4021 NULL ALPHANUMERIC 40000 RMTES_STRING 40000


I am using simple python code to contribute to that RIC via Websocket API.


It turns out that I cannot push more to FLD1 field than approx 1,5-2k of data while it should accept up to 40k as per definition.


It's worth noting that when I subscribe to similar RIC that already has longer strings in it (approx 25k) I can retrieve it properly thru the same code in python via Websocket API.


Please advise if there are any limitations to contribution via EWA?

trepwebsocketsrefinitiv-realtime-optimisedATSpost
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2 Answers

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umer.nalla avatar image
25k ●87 ●11 ●23

Hi @krzysztof.kujawski.1

The only limit I am aware of with the Websocket API is a total JSON message payload size of 64k per message. Is it possible the total message size is exceeding 64k?

Can you confirm what if any error message/response you get from the ADS or ATS when you submit the 40k field size?

There could also be other limits applied by RTDS or ATS that I am not aware of.

I would recommend you speak to your internal Market data team and ask them to examine their ATS and/or ADS/ADH logs to see if there are any further messages/errors. If they need help with this process, then they can raise a ticket for Refinitiv Real-Time Advanced Transformation Server or Advanced Distribution Server at My.Refinitiv so they can help diagnose where the issue may lie e.g. by checking logs etc on either of those products.

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krzysztof.kujawski.1 avatar image
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Hi

There are no errors in ATS logs nor ADS's. I can actually see contribution success. The size of JSON is also <64k. Since there are no limitations on EWA I will raise the ticket with support to see if my ats/rtds config is ok.

Thank you very much for your help.

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