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ES:Failed to parse mapping: Field [similarity] requires field [index] to be configured #6677

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opened 2026-02-21 18:16:48 -05:00 by yindo · 2 comments
yindo commented 2026-02-21 18:16:48 -05:00
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Originally created by @huanshare on GitHub (Nov 11, 2024).

Originally assigned to: @JohnJyong on GitHub.

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  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
  • Please do not modify this template :) and fill in all the required fields.

Dify version

0.10.2

Cloud or Self Hosted

Self Hosted (Source)

Steps to reproduce

When using es as the vector library and uploading a file, an error is reported during parsing: BadRequestError(400, 'mapper_parsing_exception', 'Failed to parse mapping: Field [similarity] requires field [index] to be configured').

es version：8.9.1

✔️ Expected Behavior

Parsing success

❌ Actual Behavior

Field [similarity] requires field [index] to be configured')

I change this,it works
WX20241111-180101@2x

Originally created by @huanshare on GitHub (Nov 11, 2024). Originally assigned to: @JohnJyong on GitHub. ### Self Checks - [X] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [X] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [X] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [X] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:） - [X] Please do not modify this template :) and fill in all the required fields. ### Dify version 0.10.2 ### Cloud or Self Hosted Self Hosted (Source) ### Steps to reproduce When using es as the vector library and uploading a file, an error is reported during parsing: BadRequestError(400, 'mapper_parsing_exception', 'Failed to parse mapping: Field [similarity] requires field [index] to be configured'). es version：8.9.1 ### ✔️ Expected Behavior Parsing success ### ❌ Actual Behavior Field [similarity] requires field [index] to be configured') I change this,it works ![WX20241111-180101@2x](https://github.com/user-attachments/assets/85ea1b7c-31b9-4555-8dd4-3e2bf836fa73)
yindo added the 👻 feat:rag label 2026-02-21 18:16:48 -05:00
yindo closed this issue 2026-02-21 18:16:48 -05:00
yindo commented 2026-02-21 18:16:49 -05:00
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@dosubot[bot] commented on GitHub (Nov 11, 2024):

To resolve the 'Failed to parse mapping: Field [similarity] requires field [index] to be configured' error in Elasticsearch version 8.9.1, you need to ensure that the index parameter is set in the mapping for the dense_vector field. The error indicates that the similarity parameter requires the index parameter to be explicitly configured.

In your code, the mapping for the dense_vector field should be updated as follows:

Field.VECTOR.value: {
    "type": "dense_vector",
    "dims": dim,
    "similarity": "cosine",
    "index": True  # or False, depending on your needs
}

Make sure to update the mapping in the create_collection method where the index is created. This should resolve the error by ensuring that the index parameter is configured as required by Elasticsearch [1].

To continue talking to Dosu, mention @dosu.

@dosubot[bot] commented on GitHub (Nov 11, 2024): <!-- Answer --> To resolve the 'Failed to parse mapping: Field [similarity] requires field [index] to be configured' error in Elasticsearch version 8.9.1, you need to ensure that the `index` parameter is set in the mapping for the `dense_vector` field. The error indicates that the `similarity` parameter requires the `index` parameter to be explicitly configured. In your code, the mapping for the `dense_vector` field should be updated as follows: ```python Field.VECTOR.value: { "type": "dense_vector", "dims": dim, "similarity": "cosine", "index": True # or False, depending on your needs } ``` Make sure to update the mapping in the `create_collection` method where the index is created. This should resolve the error by ensuring that the `index` parameter is configured as required by Elasticsearch <sup>[[1]](https://github.com/langgenius/dify/blob/main/api/core/rag/datasource/vdb/elasticsearch/elasticsearch_vector.py)</sup>. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.*
yindo commented 2026-02-21 18:16:49 -05:00
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@JohnJyong commented on GitHub (Nov 12, 2024):

for 8.9 version
image
for 8.11 version
image
the index field is optional, but the default value have changed to 'true' from 8.11 version, It's really speechless， anyway, we will add this parameter soon @huanshare

@JohnJyong commented on GitHub (Nov 12, 2024): for 8.9 version <img width="1262" alt="image" src="https://github.com/user-attachments/assets/0be862a8-aeba-4cc8-994c-6512930dd806"> for 8.11 version <img width="1269" alt="image" src="https://github.com/user-attachments/assets/47d7cf0d-ef98-41cc-b78b-e6238a4a1d78"> the `index` field is optional, but the default value have changed to 'true' from 8.11 version, It's really speechless， anyway, we will add this parameter soon @huanshare
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Reference: langgenius/dify#6677
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