dongjinleekr commented on a change in pull request #11431:
URL: https://github.com/apache/kafka/pull/11431#discussion_r740270998
##########
File path:
connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorMakerConfig.java
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@@ -183,12 +187,18 @@ public MirrorClientConfig clientConfig(String cluster) {
// fill in reasonable defaults
props.putIfAbsent(GROUP_ID_CONFIG, sourceAndTarget.source() + "-mm2");
- props.putIfAbsent(DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG,
"mm2-offsets."
- + sourceAndTarget.source() + ".internal");
- props.putIfAbsent(DistributedConfig.STATUS_STORAGE_TOPIC_CONFIG,
"mm2-status."
- + sourceAndTarget.source() + ".internal");
- props.putIfAbsent(DistributedConfig.CONFIG_TOPIC_CONFIG, "mm2-configs."
- + sourceAndTarget.source() + ".internal");
+
+ String separator =
originalsStrings().getOrDefault(REPLICATION_POLICY_SEPARATOR,
REPLICATION_POLICY_SEPARATOR_DEFAULT);
+ if (separator.equals("-")) {
+ throw new ConfigException("You should not use a single dash as a "
+ REPLICATION_POLICY_SEPARATOR);
+ }
+
+ props.putIfAbsent(DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG,
"mm2-offsets" + separator
Review comment:
> They are created in any mode if there is no value for
`DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG`
Yes, I agree. I mean, it is created as `mm2-offsets.{source}.internal` if
run in standalone mode, and `DistributedConfig.OFFSET_STORAGE_TOPIC_CONFIG` is
not explicitly set. (You know, there is a default value of it in Kafka Connect.)
> The PR's approach is trying to control the Connect topics that MM2 needs
to set up using the separator.
Totally agree.
> This is where I am not sure it's a minor fix or something that requires a
KIP that follows KIP-690.
Yes, I am also not sure whether this issue is fixing an unintended, omitted
function or proposing a new interface. @mimaison @ryannedolan How do you think?
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