# What is "JRUN\_CLUSTER\_COOKIE" error from initialisecluster() (JuliaRunClient)

**URL:** <https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651>\
**Category:** Performance\
**Tags:** question, package\
**Created:** [August 12, 2022, 6:28am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651 "2022-08-12T06:28:27Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![le\_ackerman](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/le_ackerman/32/38731_2.png) [@le\_ackerman](https://discourse.julialang.org/u/le_ackerman)\
**Post date:** [August 12, 2022, 6:28am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/1 "2022-08-12T06:28:28Z")

</div>

I was going through tutorial notebooks on parallelisations and encountered this. What does this mean?  
the same error is for initParallel() also.

 ![image](https://global.discourse-cdn.com/julialang/original/3X/e/a/ea8a530a86119fae0d198f4441366e546402819c.png)

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [August 12, 2022, 9:15am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/2 "2022-08-12T09:15:26Z")

</div>

Where did you find the tutorial? JuliaRunClient seems to not have had a release in four years, and a link to the JuliaComputing page on the GitHub repo returns a 404 - it might well be that this package is not supported any longer and does not work on recent Julia versions.

---

<div class="post-metadata">

**Author:** ![le\_ackerman](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/le_ackerman/32/38731_2.png) [@le\_ackerman](https://discourse.julialang.org/u/le_ackerman)\
**Post date:** [August 12, 2022, 9:23am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/3 "2022-08-12T09:23:58Z")

</div>

Hi! Thanks for reply  
I found this notebook on Julia tutorials on github.

What do this package do though and how is it helpful in parallelization.

There was also this macro @parallel that I came across on some tutorial documentation. But it doesn’t seem to work now.

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [August 12, 2022, 9:28am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/4 "2022-08-12T09:28:17Z")

</div>

Could you provide the actual link to the tutorial?

I have no idea what the package does, and have never come across it. If you’re new to parallel computing in Julia maybe have a look here:

[https://juliafolds.github.io/data-parallelism/](https://juliafolds.github.io/data-parallelism/)

Which also includes a list of relevant libraries towards the bottom.

---

<div class="post-metadata">

**Author:** ![le\_ackerman](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/le_ackerman/32/38731_2.png) [@le\_ackerman](https://discourse.julialang.org/u/le_ackerman)\
**Post date:** [August 12, 2022, 9:42am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/5 "2022-08-12T09:42:39Z")

</div>

Here’s the link:

> <https://github.com/JuliaAcademy/JuliaTutorials/tree/main/more-advanced-materials/parallelism-demos>
>
> //github.com/JuliaAcademy/JuliaTutorials/tree/main/more-advanced-materials/parallelism-demos

Yep! I am new to parallel computing.  
Thanks!

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [August 12, 2022, 9:53am UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/6 "2022-08-12T09:53:37Z")

</div>

Ah right, these do seem to be quite old - looks like @logankilpatrick has done some work updating them a while ago, maybe he can comment on their status.

---

<div class="post-metadata">

**Author:** ![logankilpatrick](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/logankilpatrick/32/38123_2.png) [@logankilpatrick](https://discourse.julialang.org/u/logankilpatrick)\
**Post date:** [August 12, 2022, 2:18pm UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/7 "2022-08-12T14:18:02Z")

</div>

Yeah, those videos are outdated and I am not a parallel computing expert, any interest in helping make some new videos based off of that tutorial above @nilshg 🙂 ?

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [August 12, 2022, 2:33pm UTC](https://discourse.julialang.org/t/what-is-jrun-cluster-cookie-error-from-initialisecluster-juliarunclient/85651/8 "2022-08-12T14:33:08Z")

</div>

🙂 Good try, unfortunately I know next to nothing about parallel computing as I haven’t really used it since I submitted my PhD in 2015 (although I think the distributed processing scheme based on `SharedArray`s would actually still be working fine these days!)