# Index name , doc say : Cannot be . or .. but run result **URL:** \ **Category:** Elasticsearch\ **Created:** [October 12, 2023, 2:38am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864 "2023-10-12T02:38:24Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![startjava](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/startjava/32/126461_2.png) [@startjava](https://discuss.elastic.co/u/startjava)\ **Post date:** [October 12, 2023, 2:38am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/1 "2023-10-12T02:38:24Z")
![image](https://us1.discourse-cdn.com/elastic/original/3X/6/d/6d02136d54c732fd31a411bbdab7b7badca9dc3a.png) ---
**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\ **Post date:** [October 12, 2023, 4:19am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/2 "2023-10-12T04:19:34Z")
Hi @startjava Welcome to the community Perhaps take a look at the docs you need a valid index name for `PUT /` if that is what you are trying to create, an index, but as the error message tries to explain, there are other methods for that syntax that is valid. Is valid syntax for the following ```auto GET /. HEAD /. # GET /. 200 OK { "name": "9697c215c241", "cluster_name": "docker-cluster", "cluster_uuid": "tbRI3CO6TvSYCmR6RDHMvg", "version": { "number": "8.11.0-SNAPSHOT", "build_flavor": "default", "build_type": "docker", "build_hash": "117cb3b39e713a7856bdfb604c756a4713e8a6d4", "build_date": "2023-10-10T21:22:49.722092651Z", "build_snapshot": true, "lucene_version": "9.8.0", "minimum_wire_compatibility_version": "7.17.0", "minimum_index_compatibility_version": "7.0.0" }, "tagline": "You Know, for Search" } # HEAD /. 200 OK 200 - OK ``` I am not going to run `DELETE /.` 🙂 ---
**Author:** ![startjava](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/startjava/32/126461_2.png) [@startjava](https://discuss.elastic.co/u/startjava)\ **Post date:** [October 12, 2023, 5:59am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/3 "2023-10-12T05:59:44Z")
hi @stephenb . Thank you very much for your guidance, but I'm still not sure. The document: [discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864) say: Cannot be . or .. But I use: PUT /. . as index name run it，I didn't see the following exception that I was expecting: { "error": { "root\_cause": [ { "type": "invalid\_index\_name\_exception", "reason": "Invalid index name [.], must not contain '.'", "index\_uuid": "_na_", "index": "." } ]. "type": "invalid\_index\_name\_exception", "reason": "Invalid index name [.], must not contain '.'", "index\_uuid": "_na_", "index": "." }, "status": 400 } run result is bottom： { "error": "Incorrect HTTP method for uri [/?pretty=true] and method [PUT], allowed: [GET, HEAD, DELETE]", "status": 405 } I am not sure if the index name can be used. Or... ---
**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\ **Post date:** [October 12, 2023, 6:08am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/4 "2023-10-12T06:08:51Z")
`.` alone is not a valid in index name, so not it can not be used. Can you explain what you're trying to accomplish? Are you just testing ? Why would you want to name an index Simply a period? These are both valid. ```auto PUT /.myindex #! index name [.myindex] starts with a dot '.', in the next major version, index names starting with a dot are reserved for hidden indices and system indices { "acknowledged": true, "shards_acknowledged": true, "index": ".myindex" } PUT /myindex ``` Ad as the message says from the latest release It turns out, though in 9.X index names starting with `.` will be reserved for system (not user) indices ---
**Author:** ![startjava](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/startjava/32/126461_2.png) [@startjava](https://discuss.elastic.co/u/startjava)\ **Post date:** [October 12, 2023, 6:26am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/5 "2023-10-12T06:26:37Z")
I'm just testing to see if the documentation is correct. But it turns out, it's a little mixed. Although. And.. Always the wrong index name, but it responds to misleading information, can I determine that this is a minor bug? In other words, the document should be updated to: starts with a dot '.', in the next major version, index names starting with a dot are reserved for hidden indices and system indices I am very sorry that I have a problem with document cleanliness. I hope that the es document will be more and more perfect. ---
**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\ **Post date:** [October 12, 2023, 6:29am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/6 "2023-10-12T06:29:22Z")
No worries... And no documents are perfect, ours get better over time. Also in the future it would help if you tell us what version you are on. ---
**Author:** ![startjava](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/startjava/32/126461_2.png) [@startjava](https://discuss.elastic.co/u/startjava)\ **Post date:** [October 12, 2023, 6:34am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/7 "2023-10-12T06:34:05Z")
It is suggested to optimize for this situation in the new version of the document, thank you. elasticsearch version 8.10.2 。 thanks very much。 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 9, 2023, 6:34am UTC](https://discuss.elastic.co/t/index-name-doc-say-cannot-be-or-but-run-result/344864/8 "2023-11-09T06:34:55Z")
Closed on November 9, 2023, 6:34am UTC This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.