# APM won't load balance amongst kafka partitions

**URL:** <https://discuss.elastic.co/t/apm-wont-load-balance-amongst-kafka-partitions/201691>\
**Category:** APM\
**Tags:** server\
**Created:** [September 30, 2019, 6:25pm UTC](https://discuss.elastic.co/t/apm-wont-load-balance-amongst-kafka-partitions/201691 "2019-09-30T18:25:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![stecino](https://avatars.discourse-cdn.com/v4/letter/s/ea666f/32.png) [@stecino](https://discuss.elastic.co/u/stecino)\
**Post date:** [September 30, 2019, 6:25pm UTC](https://discuss.elastic.co/t/apm-wont-load-balance-amongst-kafka-partitions/201691/1 "2019-09-30T18:25:19Z")

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APM keeps sending event to only one partition resulting in huge lag. I have 24 partition for the topic

**Kibana 7.3** :

**ES 7.3** :

**APM 7.3** :

**APM Agent node and v 2.x** :

output.kafka:  
enabled: true  
hosts: ["\*\*\*\*\*:9092"]  
topics:  
- default: 'apm'  
topic: 'apm-%{[context.service.name]}'  
partition.round\_robin:  
group\_events: 1000  
reachable\_only: false

---

<div class="post-metadata">

**Author:** ![gil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gil/32/41911_2.png) [@gil](https://discuss.elastic.co/u/gil)\
**Post date:** [October 2, 2019, 11:18am UTC](https://discuss.elastic.co/t/apm-wont-load-balance-amongst-kafka-partitions/201691/2 "2019-10-02T11:18:04Z")

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As of 7.0, `context.service.name` was moved to `service.name`. Update the topic in your config and you should see events spread out.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 23, 2019, 7:18am UTC](https://discuss.elastic.co/t/apm-wont-load-balance-amongst-kafka-partitions/201691/3 "2019-10-23T07:18:07Z")

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