out_stackdriver: error formatting JSON payload

[ryanohnemus]

Bug Report

Describe the bug
Building fluentbit from a recent master commit and using the out_stackdriver plugin produces:
[error] [output:stackdriver:stackdriver.0] error formatting JSON payload (followed by engine failed to flush chunk errors). No data is being exported to google cloud.

To Reproduce

• Steps to reproduce the problem:

Build fluent-bit from a recent git commit on master branch such as: 1cb694e

then run fluent-bit with the out_stackdriver plugin set up.

I was able to narrow it down to this commit: 1a8dd39

and doing a git revert of that commit and rebuilding resolves the issue.

Expected behavior
json payload created properly and records exported to google cloud

[patrick-stephens]

@braydonk can you have a look as I think this was functionality added to resolve a separate issue?

[braydonk]

#8229 should resolve this. There was an edge case I didn't cover while I was trying to fix the original bug.

[ryanohnemus]

Closing this after confirming #8229 resolved the issue. Thanks again @braydonk!