Drop legacy JSON format support

[fabxc]

This would mostly affect the common/expfmt library but the feature would be visible in Prometheus.
@beorn7, so the last status was that this really only affects SC internals, no?

In that case we should drop that baggage for 1.0.
I might recall incorrectly though and there were other uses that justified keeping it again and again.

[brian-brazil]

I might recall incorrectly though and there were other uses that justified keeping it again and again.

I was under the impression it was only SC.

[beorn7]

Somebody was still using the old JMX exporter, but that should be gone now. Perhaps there are remnants in Ruby clients, but I don't think any of those justify blocking it. Deprecation announcement is ages ago.

[grobie]

Support for JSON format in ruby client was dropped in release 0.5.0 / 2016-01-02.

[beorn7]

So let's drop this for 0.19?

(But then we should do it really soon to not delay 0.19 any further.)

[beorn7]

Or perhaps let's make 0.19 the last release that still supports the old format, as a last deprecation warning. (Also, it allows us to release 0.19 ~now. I really want to see the recent bug fixes released as we are running into those bugs pretty frequently.)

[brian-brazil]

I'd prefer to avoid breaking changes in 1.0, but I don't feel too strongly on this one.

[grobie]

We have kept json around for so long, I don't see a need to remove it before 1.0 either.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.