# Problem with \_update\_by\_query
**URL:** https://discuss.elastic.co/t/problem-with--update-by-query/56116
**Category:** Elasticsearch
**Created:** [July 21, 2016, 3:53pm UTC](https://discuss.elastic.co/t/problem-with--update-by-query/56116 "2016-07-21T15:53:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@cirot87](https://discuss.elastic.co/u/cirot87)
#### Post date: [July 21, 2016, 3:53pm UTC](https://discuss.elastic.co/t/problem-with--update-by-query/56116/1 "2016-07-21T15:53:24Z")
Hi all, i'm using ES v 2.3 and i have a problem with the usage of \_update\_by\_query.
I have some question:
1 - It's a plugin?
2 - I nedd to install it?
3 - I try this POST /test/test/\_update\_by\_query?conflicts=proceed but i have an error:
{
"error": {
"root\_cause": [
{
"type": "mapper\_parsing\_exception",
"reason": "failed to parse, document is empty"
}
],
"type": "mapper\_parsing\_exception",
"reason": "failed to parse, document is empty"
},
"status": 400
}
i see the log...and ES try to create a new document:
[rest.suppressed] /test/test/\_update\_by\_query Params: {conflicts=proceed, index=test, id=\_update\_by\_query, type=test}
....It's a bug? or i wrong something?
Someone can help me????
---
### Author:  [@nik9000](https://discuss.elastic.co/u/nik9000)
#### Post date: [July 21, 2016, 4:11pm UTC](https://discuss.elastic.co/t/problem-with--update-by-query/56116/2 "2016-07-21T16:11:16Z")
> [@cirot87](#):
>
> 1 - It's a plugin?
It is a module. Modules are plugins that come pre-bundled. It makes my life easier to develop it this way but it has caused some trouble folks using the transport client, trouble we're trying to fix in 5.0.
> [@cirot87](#):
>
> 2 - I nedd to install it?
No, it comes pre-installed.
> [@cirot87](#):
>
> 3 - I try this POST /test/test/\_update\_by\_query?conflicts=proceed but i have an error:
It looks like it isn't installed. Weird.
> [@cirot87](#):
>
> Someone can help me????
When you started Elasticsearch you should have a log line that looks like
```auto
[2016-07-21 12:06:22,221][INFO][plugins] [Gauntlet] modules [reindex, lang-expression, lang-groovy], plugins [], sites []
```
That is what I get from a fresh download of 2.3.3 I had laying around on my laptop. Is reindex in the list?
Can you post the output of `find modules` run from the root of you Elasticsearch install? That should include something that looks like:
```auto
modules/reindex
modules/reindex/plugin-descriptor.properties
modules/reindex/reindex-2.3.3.jar
```
You also might want to check `curl localhost:9200/_nodes/_all/plugins?pretty`. That should list the plugins the same as that logger line on startup.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 10:33pm UTC](https://discuss.elastic.co/t/problem-with--update-by-query/56116/3 "2017-07-05T22:33:37Z")