# Bulk loading data from old version of template to new

**URL:** <https://discuss.elastic.co/t/bulk-loading-data-from-old-version-of-template-to-new/140797>\
**Category:** Elasticsearch\
**Created:** [July 19, 2018, 7:27pm UTC](https://discuss.elastic.co/t/bulk-loading-data-from-old-version-of-template-to-new/140797 "2018-07-19T19:27:46Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![imarsman](https://avatars.discourse-cdn.com/v4/letter/i/e9a140/32.png) [@imarsman](https://discuss.elastic.co/u/imarsman)\
**Post date:** [July 19, 2018, 7:27pm UTC](https://discuss.elastic.co/t/bulk-loading-data-from-old-version-of-template-to-new/140797/1 "2018-07-19T19:27:46Z")

</div>

This fall I will be migrating to a much newer version of Elasticsearch (from 1.5.2). This will be done by setting up a new server to be used by my application and then following this, bulk loading the data from the many (3 per month) indexes to the new system.

My question is this: if I set up the new system with an updated template for the indexes (with new fields), how will Elasticsearch handle older index documents that are missing the new fields?

---

<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:** [August 16, 2018, 7:27pm UTC](https://discuss.elastic.co/t/bulk-loading-data-from-old-version-of-template-to-new/140797/2 "2018-08-16T19:27:48Z")

</div>

Closed on August 16, 2018, 7:27pm UTC

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.