# Troubleshooting 502 Errors During Elasticsearch Indexing **URL:** \ **Category:** Elasticsearch\ **Created:** [January 21, 2025, 12:15pm UTC](https://discuss.elastic.co/t/troubleshooting-502-errors-during-elasticsearch-indexing/373450 "2025-01-21T12:15:44Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![RainTown](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/raintown/32/140206_2.png) [@RainTown](https://discuss.elastic.co/u/RainTown)\ **Post date:** [January 21, 2025, 1:39pm UTC](https://discuss.elastic.co/t/troubleshooting-502-errors-during-elasticsearch-indexing/373450/2 "2025-01-21T13:39:11Z")
Hi welcome to the forum > [@502 error when indexing a large (?) document](https://discuss.elastic.co/t/502-error-when-indexing-a-large-document/373209): > > Hello I am having trouble diagnosing and resolving a large document upload issue... I'm using elasticsearch SaaS and there is a document which is approximately 42MB, when my software attempts to index it I get an error: "{Invalid NEST response built from a unsuccessful (502) low level call on PUT: /document/\_doc/GyIAAERPFiO3CbRqgqB8ojQEGImqU4GmI\_r4f5xNqLBLoAg3}" I'm not sure where to go from here, I would have thought there would be more details somewhere in logs somewhere but I'm not sure wh… is an ongoing thread around a similar issue. How large is your large document? And is there anything in the Elasticsearch log itself? Are you using a local cluster, or via Elastic Cloud? (versions?) --- _[View the full topic](https://discuss.elastic.co/t/troubleshooting-502-errors-during-elasticsearch-indexing/373450)._