Are trace and span id integers too big for Datadog ?

[davidjulien]

Hi,

I have an anomaly on metadata displayed by Datadog for my logs. trace_id and span_id values are incorrect if I keep them in integer format. I try different strategies to store trace_id value in metadata :

▎   7     trace_id = Tracer.current_trace_id() # returns an integer
▎   8
▎   9     Logger.info("Trace: #{Tracer.current_trace_id()}",
▎  10       trace_id_md_in_call: Tracer.current_trace_id(),
▎  11       test_tostring_build: "#{Tracer.current_trace_id()}",
▎  12       test_tostring_build_toint:
▎  13         String.to_integer(
▎  14           Regex.replace(
▎  15             ~r/[A-Z]/,
▎  16             "AFSGDFGDFGDFGD#{Tracer.current_trace_id()}RETGERYHRTJYTJX",
▎  17             ""
▎  18           )
▎  19         ),
▎  20       test_tostring_fun: Integer.to_string(Tracer.current_trace_id()),
▎  21       test_local_var: trace_id,
▎  22       test_tostring_toint:
▎  23         String.to_integer(Integer.to_string(Tracer.current_trace_id()))
▎  24      )

Log output :

"message":"Tracer: 7537620865444280684",
"test_local_var":7537620865444280684,
"test_tostring_build":"7537620865444280684",
"test_tostring_build_toint":7537620865444280684,
"test_tostring_fun":"7537620865444280684",
"test_tostring_toint":7537620865444280684,
"trace_id":7537620865444280684,
"trace_id_md_in_call":7537620865444280684

Datadog website:

message:  Tracer: 7537620865444280684
test_local_var: 7537620865444280000
test_tostring_build: 7537620865444280684
test_tostring_build_toint: 7537620865444280000
test_tostring_fun: 7537620865444280684
test_tostring_toint: 7537620865444280000
trace_id: 7537620865444280000
trace_id_md_in_call: 7537620865444280000

How to fix that ?

Moreover, is there a way to display metrics send to Datadog agent in a friendly format ? Trace and span ids in apm seem correct (whereas they are not in logs). When I click on logs related to a span, I have this filter: "trace_id:7537620865444280684". Trace id value is correct here.

Thanks !

[davidjulien]

According to https://docs.datadoghq.com/tracing/connect_logs_and_traces/opentelemetry/ , trace_id and span_id must be formatted as a string in log.

Moreover this issue should have been created in Spandex project. Sorry !