# Pass additionalFields to ECSlayout

**URL:** <https://discuss.elastic.co/t/pass-additionalfields-to-ecslayout/370479>\
**Category:** Elasticsearch\
**Created:** [November 13, 2024, 2:07pm UTC](https://discuss.elastic.co/t/pass-additionalfields-to-ecslayout/370479 "2024-11-13T14:07:14Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Narsimha\_Raju](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/narsimha_raju/32/139163_2.png) [@Narsimha\_Raju](https://discuss.elastic.co/u/Narsimha_Raju)\
**Post date:** [November 13, 2024, 2:07pm UTC](https://discuss.elastic.co/t/pass-additionalfields-to-ecslayout/370479/1 "2024-11-13T14:07:14Z")

</div>

I was trying this code snippet in my log4j2.propeties file to pass additionalFields but it is failing. Any help on this would be great help!

```auto
appender.elkRollingFile.layout.additionalFields[0].key=abc
appender.elkRollingFile.layout.additionalFields[0].value=def

```