Verbose output (--verbose) breaks JSON output (--json)

Open TheRealDJ opened this issue 2 years ago • 2 comments

Context

Version of iperf3: 3.11
Hardware: ODROID-C2
Operating system (and distribution, if any): Linux (Ubuntu 20.04 LTS)
Other relevant information (for example, non-default compilers, libraries, cross-compiling, etc.): N/A

Expected Behavior With --json specified, the output of STDOUT should be working JSON
Actual Behavior With --verbose in conjunction with --json, the verbose output messages are sent to STDOUT along with JSON, breaking JSON
Steps to Reproduce iperf3 --client XXX ... --verbose --json
Possible Solution Output verbose messages to STDERR (at least when --json is used also).

Aug 01 '22 21:08 TheRealDJ

On one hand, this behavior shouldn't be a surprise because iperf3 prints this warning if you try to use those two features together:

warning: Verbose output (-v) may interfere with JSON output (-J)

On the other hand it'd probably be good if iperf3 didn't do that.

Aug 02 '22 15:08 bmah888

Can't the debug output be outputted to STDERR to resolve this?

Nov 04 '22 16:11 TheRealDJ