# No cached mapping for this field.Refresh field list from the lanagement
**URL:** https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835
**Category:** APM
**Created:** [June 12, 2020, 6:49am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835 "2020-06-12T06:49:21Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@wajika](https://discuss.elastic.co/u/wajika)
#### Post date: [June 12, 2020, 6:49am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/1 "2020-06-12T06:49:21Z")
I tried "Management -\> Index Patterns and hit Refresh button",but it didn't work.
I updated the fields.yml http field of apmserver, but it is still useless.
apmserver: 7.6.2
ELK: 7.4.2
---
### Author:  [@simitt](https://discuss.elastic.co/u/simitt)
#### Post date: [June 12, 2020, 8:24am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/2 "2020-06-12T08:24:56Z")
Hi @wajika,
instead of directly changing the `fields.yml` you can add additional fields to your mapping via configuring [`setup.template.append_fields`](https://www.elastic.co/guide/en/apm/server/current/configuration-template.html) in the `apm-server.yml`. If you want to enable `dynamic` for `http.request.headers` you could configure:
```auto
setup.template.append_fields:
- name: http.request.headers
type: group
dynamic: true
```
Be aware though that a template only gets applied to newly created indices. If the index existed before you changed the template, the changes won't be applied to this index. You can check if the template mapping has been applied by calling `GET apm-*transaction/_mapping`.
---
### Author:  [@wajika](https://discuss.elastic.co/u/wajika)
#### Post date: [June 13, 2020, 1:42am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/3 "2020-06-13T01:42:38Z")
After I use setup.template.append\_fields, the transaction index no longer appears.
I deleted all apm indexes and then restarted apmserver.
apmserver log
[https://paste.ubuntu.com/p/jbYPcgXCzp/](https://paste.ubuntu.com/p/jbYPcgXCzp/)
es log
[https://paste.ubuntu.com/p/cMfNjMCxJx/](https://paste.ubuntu.com/p/cMfNjMCxJx/)
---
### Author:  [@wajika](https://discuss.elastic.co/u/wajika)
#### Post date: [June 15, 2020, 6:33am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/4 "2020-06-15T06:33:09Z")
> [@simitt](#):
>
> ```auto
> setup.template.append_fields:
> - name: http.request.headers
> type: group
> dynamic: true
>
> ```
setup.template.append\_fields:
- name: http.request.headers \>\>\> If I write http.request.headers can it affect the http.request.body.original field (depth four levels)
type: group
dynamic: true
---
### Author:  [@simitt](https://discuss.elastic.co/u/simitt)
#### Post date: [June 15, 2020, 6:57am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/5 "2020-06-15T06:57:18Z")
```auto
ERROR pipeline/output.go:100 Failed to connect to backoff(elasticsearch(xxx)): Connection marked as failed because the onConnect callback failed: resource 'apm-7.6.2-span' exists, but it is not an alias
```
This error from your `apm-server.log` file suggests that the `apm-7.6.2-span` exists as index, while it should be a write alias. You can find more information about when this error happens in [Issues#3698](https://github.com/elastic/apm-server/issues/3698).
> If I write http.request.headers can it affect the http.request.body.original field (depth four levels)
You can specify an array of fields to append to the template. Every field definition will only be applied to the specified group of fields. Therefore `http.request.headers` will not impact `http.request.body.original`, but only everything nested under `http.request.headers`.
In case you would like to index the body, you could for example specify it as multifield:
```auto
setup.template.append_fields:
- name: http.request.headers
type: group
dynamic: true
- name: http.request.body.original
type: keyword
ignore_above: 1024
multi_fields:
- name: text
type: text
```
---
### Author:  [@wajika](https://discuss.elastic.co/u/wajika)
#### Post date: [June 17, 2020, 3:00am UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/6 "2020-06-17T03:00:26Z")
Thank you for the method @simitt
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 7, 2020, 11:03pm UTC](https://discuss.elastic.co/t/no-cached-mapping-for-this-field-refresh-field-list-from-the-lanagement/236835/7 "2020-07-07T23:03:30Z")
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