title: Kafka enable.auto.commit = true and commitSync() is used
body: <p>It is recommended that <code>commitSync()</code> should only be used when <code>enable.auto.commit</code> is set to <code>false</code>. But we used <code>commitSync()</code> and forgot to set <code>enable.auto.commit</code> to <code>false</code>. So I wanted to know what would be happening in this case?</p>