consume from a specific partition

I have 6 partitions and 3 consumers. I need to assign partition1 and partition2 to consumer1, partition3 and partition5 to consumer2, partition4 and partition6 to the consumer3. I tried with assign() function, but it's not giving the expected result. I am using confluent kafka with node-rdkafka library.

Start by reading node-rdkafka's assign() entry point and the Kafka partition-assignment behavior relevant to the six-partition, three-consumer setup. Reproduce the requested mapping and compare it with the observed result; done means the cause and supported configuration are documented or a focused fix is identified.

Written by the indexing model from the issue text.