Configure offset when consuming kafka topic

@vasily802 wrote:

I am using Alpakka-kafka in scala to consume a Kafka topic. Here’s my code:

    val kafkaConsumerSettings: ConsumerSettings[String, String] =
      ConsumerSettings(actorSystem, new StringDeserializer, new StringDeserializer)
        .withBootstrapServers(kafkaConfig.server)
        .withGroupId(kafkaConfig.group)
        .withProperties(
          ConsumerConfig.MAX_POLL_RECORDS_CONFIG       -> "100",
          ConsumerConfig.AUTO_OFFSET_RESET_CONFIG      -> "earliest",
          CommonClientConfigs.SECURITY_PROTOCOL_CONFIG -> "SSL"
        )

    Consumer
        .plainSource(kafkaConsumerSettings, Subscriptions.topics(kafkaConfig.topic))
        .runWith(Sink.foreach(println))

However, consumer only starts polling from the first uncommitted message in topic. I would like to always start from offset 0, regardless of messages being committed. With Alpakka consumer, how do I specify offset manually?

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