chia7712 commented on code in PR #20248:
URL: https://github.com/apache/kafka/pull/20248#discussion_r2245241241
##########
tools/src/main/java/org/apache/kafka/tools/FeatureCommand.java:
##########
@@ -315,11 +305,9 @@ private static void handleUpgradeOrDowngrade(String op,
Namespace namespace, Adm
if (metadata != null) {
System.out.println(" `metadata` flag is deprecated and may be
removed in a future release.");
try {
- metadataVersion =
MetadataVersion.fromVersionString(metadata);
+ metadataVersion =
MetadataVersion.fromVersionString(metadata, false);
Review Comment:
Yes, it remains consistent with the original implementation. However, it
also introduces a new restriction
```java
} else if (!unstableFeatureVersionsEnabled &&
!metadataVersion.isProduction()) {
throw new IllegalArgumentException(errorMsg);
```
For example, users may download the trunk source code to test an upgrade
with an older version of Kafka, and this new restriction could prevent them
from upgrading to a non-production MV. Shouldn't it?
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