External processor plugin - configuration not applied

[a-bali]

This is a reopen of #8153 with some more details. Applies to current version as of today.

I have written a simple external processor plugin, see source code here, following the instructions here.

The plugin is invoked with execd as follows:

[[processors.execd]]
command = ["/home/bali/geoip", "-config", "/home/bali/plugin.conf"]

And the problem is that the contents of the specified configuration file are read but not applied to the plugin.

I have also found out that it works properly in case the external processor plugin is a StreamingProcessor instead of a standard Processor, therefore the problem appears to be when a Processor is converted to a StreamingProcessor, the configuration settings are not applied.

[ssoroka]

ah, yes, I think you're on to something there. I'll check out your example code and figure out what's going on.

[ssoroka]

Thanks for the detailed bug report. That made it easy to track down. It's patched now, and will be in the nightly release tomorrow, and will be in 1.16.0-rc2 and 1.15.4 when they come out.