# Scripted upsert fails

**URL:** <https://discuss.elastic.co/t/scripted-upsert-fails/149078>\
**Category:** Logstash\
**Created:** [September 19, 2018, 8:18am UTC](https://discuss.elastic.co/t/scripted-upsert-fails/149078 "2018-09-19T08:18:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Nenad](https://avatars.discourse-cdn.com/v4/letter/n/13edae/32.png) [@Nenad](https://discuss.elastic.co/u/Nenad)\
**Post date:** [September 19, 2018, 8:18am UTC](https://discuss.elastic.co/t/scripted-upsert-fails/149078/1 "2018-09-19T08:18:05Z")

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I have below output:

output {  
elasticsearch {  
index =\> "meet2"  
document\_type =\> "seen"  
document\_id =\> "%{member\_a}"  
hosts =\> ["s1:9200"]  
# doc\_as\_upsert =\> true  
action =\> "update"  
scripted\_upsert =\> true  
script =\> 'ctx.\_source.member\_b += params["member\_b"]'  
script\_var\_name =\> "params"  
script\_type =\> "inline"  
}  
}

I got null\_pointer\_exception, how I can reach that logstash append on existing doc the value?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 17, 2018, 8:18am UTC](https://discuss.elastic.co/t/scripted-upsert-fails/149078/2 "2018-10-17T08:18:11Z")

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This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.

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<div class="post-metadata">

**Author:** ![Alex\_Marquardt](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alex_marquardt/32/42925_2.png) [@Alex\_Marquardt](https://discuss.elastic.co/u/Alex_Marquardt)\
**Post date:** [December 17, 2019, 2:06pm UTC](https://discuss.elastic.co/t/scripted-upsert-fails/149078/3 "2019-12-17T14:06:03Z")

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An example of how to execute scripted upserts from Logstash is given in the following blog article: [https://alexmarquardt.com/2019/12/17/exploring-the-capabilities-of-logstash-and-elasticsearch-scripted-upserts/](https://alexmarquardt.com/2019/12/17/exploring-the-capabilities-of-logstash-and-elasticsearch-scripted-upserts/)