Kafka exporter - Additional parameters are not passed to librdkafka

[DivaCtyWest]

Environment:

• OS name: Red Hat
• OS version: Enterprise Linux 9.4 (Plow)
• Architecture: x86-64
• ntopng version/revision: 6.3.241001 [Enterprise/Professional build]

What happened: Attempted to pass multiple librdkafka parameters to the Kafka exporter but only the first one is observed.

How did you reproduce it? ntopng -i wlan0 -F kafka;broker;topic;security.protocol=SASL_SSL,debug=all I would expect librdkafka to generate increased logging but there isn't any. However, if the options are switched so that debug=all comes first, then the extra logging appears. ntopng -i wlan0 -F kafka;broker;topic;debug=all,security.protocol=SASL_SSL This makes me think that the extra Kafka options aren't being passed correctly. The documentation suggests that multiple parameters are supported and are to be separated with commas.

Debug Information: When debug=all is applied librdkafka will display the parameters it has been initialised with:

ntopng-1  | %7|1727948257.186|CONF|rdkafka#producer-1| [thrd:app]: Client configuration:
ntopng-1  | %7|1727948257.186|CONF|rdkafka#producer-1| [thrd:app]:   client.software.version = 2.3.0
ntopng-1  | %7|1727948257.186|CONF|rdkafka#producer-1| [thrd:app]:   metadata.broker.list = broker
ntopng-1  | %7|1727948257.187|CONF|rdkafka#producer-1| [thrd:app]:   debug = generic,broker,topic,metadata,feature,queue,msg,protocol,cgrp,security,fetch,interceptor,plugin,consumer,admin,eos,mock,assignor,conf,all

Note that the security.protocol parameter doesn't appear. This seems to confirm that not all extra parameters are passed to librdkafka.

[lucaderi]

The split divisor was not "," but yu are right that makes more sense to use comma.

Fix done, new packages will be available in about 1h from now.

[DivaCtyWest]

Thanks @lucaderi . Do you know if this will be applied to other ntop utilities (especially Cento)?