[Solved] A user configures this transform chain:transforms=DropFieldstransforms.DropFields.type=org.apache.kafka.connect.transforms.ReplaceField$Valuetransforms.DropFields.... | Kafka

Kafka - Connect

A user configures this transform chain:

transforms=DropFields
transforms.DropFields.type=org.apache.kafka.connect.transforms.ReplaceField$Value
transforms.DropFields.blacklist=field1,field2

The connector throws an error. What is the problem?

AComma-separated fields are not allowed

B'blacklist' is deprecated; should use 'excludes' instead

CThe fields to drop must be specified as 'whitelist'

DThe transform type is incorrect for dropping fields

Step-by-Step Solution

Solution:

Step 1: Check ReplaceField config keys
'blacklist' is deprecated; the correct key is 'excludes' to drop fields.
Step 2: Identify cause of error
Using 'blacklist' causes config validation failure and connector error.
Final Answer:
'blacklist' is deprecated; should use 'excludes' instead -> Option B
Quick Check:
Use 'excludes' to drop fields, not 'blacklist' [OK]

Quick Trick: Use 'excludes' instead of deprecated 'blacklist' to drop fields [OK]

Common Mistakes:

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A user configures this transform chain: