Kafka Connect JDBC - Oracle - Number of groups must be positive
Read OriginalThe article details a troubleshooting scenario for Apache Kafka Connect using the JDBC source connector with an Oracle database. It explains that the error 'Number of groups must be positive' can occur when the table name specified in the connector's `table.whitelist` configuration uses a different case (e.g., lowercase) than how Oracle returns it (uppercase). The solution involves matching the case exactly, demonstrated by changing the config from 'kafka_test' to 'KAFKA_TEST'.
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