# What is the meaning of the following acronyms? "o.e.a.a.i.m.p." and "o.e.c.s." **URL:** \ **Category:** Elasticsearch\ **Created:** [March 4, 2025, 9:13pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405 "2025-03-04T21:13:37Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Chris\_McGrath](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chris_mcgrath/32/141803_2.png) [@Chris\_McGrath](https://discuss.elastic.co/u/Chris_McGrath)\ **Post date:** [March 4, 2025, 9:13pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/1 "2025-03-04T21:13:37Z")
I saw in AWS OpenSearch logs a message very similar to a stack overflow post, The key part of which is: ```auto [2020-03-17T09:13:08,964][DEBUG][o.e.c.s.MasterService] [prod-apm-elasticsearch103.example.com] processing [put-mapping[events]]: execute [2020-03-17T09:13:08,967][DEBUG][o.e.a.a.i.m.p.TransportPutMappingAction] [prod-apm-elasticsearch103.example.com] failed to put mappings on indices ``` I see [o.e.c.s.MasterService] & [o.e.a.a.i.m.p.TransportPutMappingAction] show up in logs of Elasticsearch logs on posts on the internet, but I've yet to see a post that explains what the acronyms stand for. **So what does o.e.c.s. & o.e.a.a.i.m.p. mean / stand for?** ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 4, 2025, 9:13pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/2 "2025-03-04T21:13:37Z")
OpenSearch/OpenDistro are AWS run products and differ from the original Elasticsearch and Kibana products that Elastic builds and maintains. You may need to contact them directly for further assistance. See [What is OpenSearch and the OpenSearch Dashboard? | Elastic](https://www.elastic.co/elasticsearch/opensearch) for more details. (This is an automated response from your friendly Elastic bot. Please report this post if you have any suggestions or concerns :elasticheart: ) ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 4, 2025, 9:28pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/3 "2025-03-04T21:28:57Z")
Welcome! That's the name of Java packages but only the first letter is displayed. ---
**Author:** ![Chris\_McGrath](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chris_mcgrath/32/141803_2.png) [@Chris\_McGrath](https://discuss.elastic.co/u/Chris_McGrath)\ **Post date:** [March 4, 2025, 9:53pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/4 "2025-03-04T21:53:06Z")
Thanks your comment does add clarity, still it'd be nice to know the full meaning if possible. ---
**Author:** ![Chris\_McGrath](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chris_mcgrath/32/141803_2.png) [@Chris\_McGrath](https://discuss.elastic.co/u/Chris_McGrath)\ **Post date:** [March 4, 2025, 9:58pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/5 "2025-03-04T21:58:11Z")
I think I figured it out based on your hint 🙂 ![image](https://us1.discourse-cdn.com/elastic/original/3X/2/0/20aad8a489bd0431c7dc82a3cdfd756deb59efb9.png) o.e.c.s.MasterService = org/elasticsearch/cluster/service/MasterService.java Likewise o.e.a.a.i.m.p.TransportPutMappingAction = org/elasticsearch/action/admin/indices/mapping/put/TransportPutMappingAction.java ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 4, 2025, 10:39pm UTC](https://discuss.elastic.co/t/what-is-the-meaning-of-the-following-acronyms-o-e-a-a-i-m-p-and-o-e-c-s/375405/6 "2025-03-04T22:39:05Z")
Yes. But note that the code diverged A LOT with OpenSearch. We added so many features in the last years 😏 Did you look at [Cloud by Elastic](https://www.elastic.co/cloud), also available if needed from [AWS Marketplace](https://aws.amazon.com/marketplace/pp/Elasticsearch-Inc-Elasticsearch-Service-on-Elastic/B01N6YCISK), [Azure Marketplace](https://azuremarketplace.microsoft.com/en-us/marketplace/apps/elastic.ec-azure?tab=Overview) and [Google Cloud Marketplace](https://console.cloud.google.com/marketplace/details/endpoints/elasticsearch-service.gcpmarketplace.elastic.co)? Cloud by elastic is one way to have access to **all features** , all managed by us. Think about what is there yet like Vector Search, Security, Monitoring, Reporting, ES|QL, Canvas, Maps UI, Alerting and built-in solutions named [Observability](https://www.elastic.co/observability), [Security](https://www.elastic.co/security) and what is coming next 🙂 ...