# websocket connection error in Paraview web osmesa docker image

**URL:** https://discourse.paraview.org/t/websocket-connection-error-in-paraview-web-osmesa-docker-image/8310
**Category:** Web Support
**Created:** [November 3, 2021, 5:39am UTC](https://discourse.paraview.org/t/websocket-connection-error-in-paraview-web-osmesa-docker-image/8310 "2021-11-03T05:39:33Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![rasunag27](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rasunag27/32/4636_2.png) [@rasunag27](https://discourse.paraview.org/u/rasunag27)
#### Post date: [November 3, 2021, 5:39am UTC](https://discourse.paraview.org/t/websocket-connection-error-in-paraview-web-osmesa-docker-image/8310/1 "2021-11-03T05:39:33Z")

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Hi,

I am trying to run Paraview web Visualizer inside docker. For this, I used osmesa-visualizer docker image using the command:

```auto
docker pull kitware/paraviewweb:pvw-visualizer-osmesa-master

```

But when I run the docker, it runs the apache server and also launcher. When I go to web browser using the link `http://localhost:9000/visualizer`, I get the following error presented in the image below:

The logs in the laucherLog.Log is captured and also proxy is popped with unique no.  
What work around needs to be done?

 ![visualizer_web_error](https://discourse.paraview.org/uploads/default/original/2X/1/1297c5b38573068125938338155df685cd501253.png)

Regards,  
Sunag R A.

---

<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 3, 2021, 2:41pm UTC](https://discourse.paraview.org/t/websocket-connection-error-in-paraview-web-osmesa-docker-image/8310/2 "2021-11-03T14:41:53Z")

</div>

Duplicate of [Minified reaction error #31 and websocket connection error · Issue #534 · Kitware/paraviewweb · GitHub](https://github.com/Kitware/paraviewweb/issues/534)