apache kafka – How can I get when the last time that consumer commit an offset?

Timestamp information isn’t stored with group offsets, it’s only part of the topic segment files.

For example, to find the time of the record at the committed offset, that can be found using a consumer and seeking to the committed offset, polling that one record, then looking at the record timestamp.

You can similarly do this for the __consumer_offsets topic, and searching for the group name for when any group was produced to this topic (i.e. when offsets were committed)