Flaky failure of INTEGRATION_recorder

[scpeters]

Environment

• OS Version: Ubuntu 20.04
• Source or binary build? source build of ign-transport in Focal GitHub action

Description

• Expected behavior: test passes
• Actual behavior: test failed

Steps to reproduce

1. Build from source
2. Run INTEGRAITON_recorder many times
3. See how often it fails

Output

See #216 (comment) referring to the following action:

• https://github.com/ignitionrobotics/ign-transport/runs/2239602461

[ RUN      ] recorder.BeginRecordingTopicsAfterAdvertisement
  Chirping [1500] times on [2] topics:
   -- /foo
   -- /bar
  /github/workspace/log/test/integration/recorder.cc:206: Failure
  Expected equality of these values:
    numChirps
      Which is: 1500
    protoMsg.data()
      Which is: 1499
  [  FAILED  ] recorder.BeginRecordingTopicsAfterAdvertisement (3801 ms)

[scpeters]

I just observed a flaky failure on an 18.04 GitHub action:

• https://github.com/ignitionrobotics/ign-transport/runs/2561193271?check_suite_focus=true

[ RUN      ] recorder.BeginRecordingAllBeforeAdvertisement
Chirping [100] times on [4] topics:
 -- /foo1
 -- /foo2
 -- /bar1
 -- /bar2
/github/workspace/log/test/integration/recorder.cc:264: Failure
Expected equality of these values:
  numChirps*numMatchingTopics
    Which is: 400
  count
    Which is: 396
[  FAILED  ] recorder.BeginRecordingAllBeforeAdvertisement (2201 ms)
...
 [==========] 9 tests from 1 test case ran. (14475 ms total)
  [  PASSED  ] 8 tests.
  [  FAILED  ] 1 test, listed below:
  [  FAILED  ] recorder.BeginRecordingAllBeforeAdvertisement