# Find missing documents in an index **URL:** \ **Category:** Elasticsearch\ **Created:** [April 20, 2015, 3:05pm UTC](https://discuss.elastic.co/t/find-missing-documents-in-an-index/23327 "2015-04-20T15:05:51Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![seallison](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@seallison](https://discuss.elastic.co/u/seallison)\ **Post date:** [April 20, 2015, 3:05pm UTC](https://discuss.elastic.co/t/find-missing-documents-in-an-index/23327/1 "2015-04-20T15:05:51Z")
Is there a way for Elasticsearch to tell me documents that are NOT in an index given a set of criteria? I have a field in my documents that contains a unique numerical id. There are some ids that are missing from documents in the index and I want to find those ids. For example: { "product\_id": 1000 }, {"product\_id": 1002}, {"product\_id": 1004}, {"product\_id": 1005}, ... In this example I want to find that documents with a product\_id of 1001 and 1003 are missing from the index. Is this something an aggregation could help me identify? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/50ba365a-02c8-40ce-8d9d-c49cedd7e2da%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/50ba365a-02c8-40ce-8d9d-c49cedd7e2da%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:18am UTC](https://discuss.elastic.co/t/find-missing-documents-in-an-index/23327/2 "2017-07-06T00:18:40Z")