# Logstash merge events

**URL:** <https://discuss.elastic.co/t/logstash-merge-events/211265>\
**Category:** Logstash\
**Created:** [December 10, 2019, 9:50am UTC](https://discuss.elastic.co/t/logstash-merge-events/211265 "2019-12-10T09:50:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ram\_29](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_29/32/47522_2.png) [@Ram\_29](https://discuss.elastic.co/u/Ram_29)\
**Post date:** [December 10, 2019, 9:50am UTC](https://discuss.elastic.co/t/logstash-merge-events/211265/1 "2019-12-10T09:50:57Z")

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Hi

I want to merge two events. First one has few fields, which I will merge with second event using aggregate plugin. But at times, first event comes little late and second event has null values for those fields. I want aggregate-update(which is part of second update) to wait till some one create the aggregate id(which is part of first event). By any chance is this possible?

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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:** [January 7, 2020, 9:51am UTC](https://discuss.elastic.co/t/logstash-merge-events/211265/2 "2020-01-07T09:51:01Z")

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