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https://issues.apache.org/jira/browse/KAFKA-7930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16767936#comment-16767936
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Matthias J. Sax commented on KAFKA-7930:
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{quote}Now they are being used for different purposes like cached lookup, which
are populated from various other places. And they effectively became "input"
topics represented as GlobalKTable.
{quote}
This should not have happened... Note that, all internal topic should not be
read/written by any other application. If you want to share data, you should
always create your own topics and write to them via `to()` or `through()`.
{quote}For application reset it is enough to shift offsets to earliest,
{quote}
For this case, you could use `bin/kafka-consumer-group.sh` instead of stream
reset tool. Thus, I am wondering if we should patch the reset tool at all, as
there is an alternative tool you can use?
> StreamsResetter makes "changelog" topic naming assumptions
> ----------------------------------------------------------
>
> Key: KAFKA-7930
> URL: https://issues.apache.org/jira/browse/KAFKA-7930
> Project: Kafka
> Issue Type: Improvement
> Components: streams, tools
> Affects Versions: 2.1.0
> Reporter: Murad M
> Priority: Major
> Labels: features, needs-kip, patch-available, usability
>
> StreamsResetter deletes the topics considered internal. Currently it just
> checks the naming as per
> [code|https://github.com/apache/kafka/blob/1aae604861068bb7337d4972c9dcc0c0a99c374d/core/src/main/scala/kafka/tools/StreamsResetter.java#L660].
> If assumption is wrong (either topic prefix or suffix), tool becomes useless
> if aware even dangerous if not. Probably better either:
> * naming assumption should be optional and supply internal topics with
> argument (--internal-topics)
> * deletion could be optional (--no-delete-internal)
> * ignore topics which are included in list of --input-topics
> Faced this, when was trying to reset applications with GlobalKTable topics
> named as *-changelog. Such topics sometimes are not desirable for deletion.
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