google-cloud-trace does not work with rails 7

[shouichi]

Environment details

• OS: linux
• Ruby version: 3.1.1
• Gem name and version: 0.41.3

Steps to reproduce

1. gem install rails
2. configure google-cloud-trace
3. send requests to rails server

grpc log shows that the library sends invalid traces.

D, [2022-04-07T06:00:42.994247 #1] DEBUG -- : calling cloudtrace.googleapis.com:/google.devtools.cloudtrace.v1.TraceService/PatchTraces
D, [2022-04-07T06:00:43.182028 #1] DEBUG -- : Failing with status #<struct Struct::Status code=3, details="Invalid timestamp: 54234-08-05 10:32:55.794433593 +0000 UTC", metadata={}, debug_error_string="{\"created\":\"@1649311243.181814787\",\"description\":\"Error received from peer ipv4:173.194.202.95:443\",\"file\":\"src/core/lib/surface/call.cc\",\"file_line\":1063,\"grpc_message\":\"Invalid timestamp: 54234-08-05 10:32:55.794433593 +0000 UTC\",\"grpc_status\":3}">

It seems that rails 7 introduced a braking change of ActiveSupport::Notifications::Event. Particularly, time from active support events are unix timestamp in millisecond, but google-cloud-trace assumes seconds.

• Refactor Process.clock_gettime uses rails/rails#43502

• google-cloud-ruby/google-cloud-trace/lib/google/cloud/trace/utils.rb

  Line 35 in c8369f1

  time = Time.at time if time.is_a? Numeric

Thanks.

Code example

N/A.

Full backtrace

N/A.