# Courier fetch: response is null

**URL:** <https://discuss.elastic.co/t/courier-fetch-response-is-null/235566>\
**Category:** Kibana\
**Created:** [June 3, 2020, 1:57pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566 "2020-06-03T13:57:38Z")\
**Posts on this page:** 12\
**Page:** 1

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 3, 2020, 1:57pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/1 "2020-06-03T13:57:39Z")

</div>

Hi,  
Whenever I try to use a visualization, dashboard or the discovery tab I get the following error:

```auto
Courier fetch: response is null

Version: 7.5.1
Build: 27610
Error: response is null

```

No one else in my team is getting it. I've tried googling it but I can't find any information about it. Here's the console output:

```auto
INFO: 2020-06-03T13:25:51Z
  Adding connection to http://elqui.admetricks.net/elasticsearch

vendors.bundle.dll.js:559:139453
TypeError: "response is null"

```

The only difference I have from others in my team is that I'm using ubuntu linux and the internet connection I guess.

Our elk stack is running on "elasticsearch on kubernetes".

---

<div class="post-metadata">

**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [June 3, 2020, 2:00pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/2 "2020-06-03T14:00:26Z")

</div>

What browser are you using?

Also, could you open the Developer Tools and go to the Network tab? The request causing the problem should show up there. Copying the request and response (if there is one) could be helpful.

If you are using the security solution it might also be helpful to check the roles associated with your user (whether there are any differences to your team mates)

---

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 3, 2020, 2:08pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/3 "2020-06-03T14:08:10Z")

</div>

Firefox version:

```auto
$ firefox --version
Mozilla Firefox 76.0.1

```

The only request that isn't a 200 or 304 is this one (it doesn't have a http status code):  
`/_search?rest_total_hits_as_int=true&ignore_unavailable=true&ignore_throttled=true&preference=1591192933292&timeout=30000ms`

These are some of the headers:

```auto
POST /elasticsearch/adspy2*/_search?rest_total_hits_as_int=true&ignore_unavailable=true&ignore_throttled=true&preference=1591192933292&timeout=30000ms HTTP/1.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0
Accept: application/json, text/plain, */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
content-type: application/json
kbn-version: 7.5.1
Content-Length: 489
Connection: keep-alive

```

And there's no response.

Regarding to security, we are all using the same user.

---

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 3, 2020, 3:20pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/4 "2020-06-03T15:20:53Z")

</div>

Also.I tried chrome and it seems it's working ok there.

---

<div class="post-metadata">

**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [June 3, 2020, 3:45pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/5 "2020-06-03T15:45:11Z")

</div>

This request looks like like a Courier request. It's interesting this is only happening in firefox - could you check whether the same request is there in Chrome as well and whether there are any differences in parameters/payload?

---

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 3, 2020, 4:15pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/6 "2020-06-03T16:15:52Z")

</div>

The only difference in the url is "preference":  
`...&preference=1591192933292&...` vs `...&preference=1591200605660&...`

in the headers the only difference I see is the User-agent:

```auto
POST /elasticsearch/adspy2*/_search?rest_total_hits_as_int=true&ignore_unavailable=true&ignore_throttled=true&preference=1591200353102&timeout=30000ms HTTP/1.1
Connection: keep-alive
Content-Length: 823
Accept: application/json, text/plain, */*
kbn-version: 7.5.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
content-type: application/json
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9

```

---

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 3, 2020, 8:25pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/7 "2020-06-03T20:25:59Z")

</div>

Maybe I should try another firefox version?

---

<div class="post-metadata">

**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [June 6, 2020, 9:11am UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/8 "2020-06-06T09:11:43Z")

</div>

I can’t reproduce the problem with Firefox. Do you have the ability to check whether this is happening with the latest version 7.7.1 as well?

---

<div class="post-metadata">

**Author:** ![DanielVZ96](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@DanielVZ96](https://discuss.elastic.co/u/DanielVZ96)\
**Post date:** [June 12, 2020, 1:19pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/9 "2020-06-12T13:19:35Z")

</div>

Sure I'll try.

---

<div class="post-metadata">

**Author:** ![IngaFeick](https://avatars.discourse-cdn.com/v4/letter/i/7ab992/32.png) [@IngaFeick](https://discuss.elastic.co/u/IngaFeick)\
**Post date:** [June 22, 2020, 2:14pm UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/10 "2020-06-22T14:14:44Z")

</div>

I'm seeing this aswell. Firefox 77.0.1, Elasticsearch 7.6.1.  
Interestingly the same url gives me a `response is null`

```auto
callClient/</</response<@http://logs.something/bundles/commons.bundle.js:3:3383152

```

in Firefox, but in Chrome the error message is  
`Cannot read property 'timed_out' of null`

```auto
callClient/</</response<@http://logs.something/bundles/commons.bundle.js:3:3383152

```

The triggering url looks like  
`http://logs.something/app/kibana#/discover?_g=()&_a=(columns:!(_source),index:cc79f970-d2ff-11e9-b2c6-dbd2f4f2af8b,interval:auto,query:(language:lucene,query:''),sort:!(!('@timestamp',desc)))`

Update: the index pattern that I was working on had both the words "ad" and "google" in there, and that had the adblocker kick in, which just so happened to be installed on both browsers 😃  
Deactivating the adblocker solved the issue.

---

<div class="post-metadata">

**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [June 23, 2020, 7:13am UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/11 "2020-06-23T07:13:06Z")

</div>

That's an interesting one, thanks for updating the thread 🙂

---

<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:** [July 21, 2020, 7:13am UTC](https://discuss.elastic.co/t/courier-fetch-response-is-null/235566/12 "2020-07-21T07:13:10Z")

</div>

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