In brief, this is system level configuration by Kafka. Consumer offsets partitions can't be changed through command line.
You have to change the configuration file and set this *offsets.topic.num.partitions* property to change this. On Sun, Mar 25, 2018, 12:49 Anu P <iamkafkau...@gmail.com> wrote: > Hi, > > I am trying to change the number of partitions for __consumer_offsets topic > by using the following command. However, I get an error stating "Number of > partitions for offsets topic cannot be changed" > > > */opt/kafka/bin/kafka-topics.sh --zookeeper <zookeeper> --alter --topic > __consumer_offsets --partitions 54 * > > > Error while executing topic command : The number of partitions for the > offsets topic cannot be changed. > ERROR java.lang.IllegalArgumentException: The number of partitions for the > offsets topic cannot be changed. > at > > kafka.admin.TopicCommand$$anonfun$alterTopic$1.apply(TopicCommand.scala:142) > ..... > > > > Environment details: > > 1. 3 zookeepers and 3 kafka brokers (version 1.0.1) > 2. After deploying kafka, I tried the kafka-topics command (above) to > increase it partitions. But it fails. Can someone please help me > understand > why? Am I missing something? > 3. I want to distribute partitions leaders equally among brokers. So > want to increase the number of partitions for offsets topic. > > > Thanks in advance. > > Tanvi >
