m1a2st commented on code in PR #20334:
URL: https://github.com/apache/kafka/pull/20334#discussion_r2295115557
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connect/transforms/src/main/java/org/apache/kafka/connect/transforms/HeaderFrom.java:
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@@ -61,11 +61,13 @@ public abstract class HeaderFrom<R extends
ConnectRecord<R>> implements Transfor
public static final ConfigDef CONFIG_DEF = new ConfigDef()
.define(FIELDS_FIELD, ConfigDef.Type.LIST,
- NO_DEFAULT_VALUE, new NonEmptyListValidator(),
+ NO_DEFAULT_VALUE,
+ new NonEmptyListValidator(),
ConfigDef.Importance.HIGH,
"Field names in the record whose values are to be copied
or moved to headers.")
.define(HEADERS_FIELD, ConfigDef.Type.LIST,
- NO_DEFAULT_VALUE, new NonEmptyListValidator(),
+ NO_DEFAULT_VALUE,
+ ConfigDef.ValidList.anyNonDuplicateValues(false, false),
Review Comment:
It seens the `headers` config should allow the dulpicated value, we can see
the testcase. I will updated the KIP.
https://github.com/apache/kafka/blob/eba9839776c07e860c9aa7fe2d028e4f65031d5b/connect/transforms/src/test/java/org/apache/kafka/connect/transforms/HeaderFromTest.java#L251
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