# AttributeError: module 'pygloo.rendezvous' has no attribute 'CustomStore'

**URL:** <https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025>\
**Category:** Ray Train\
**Created:** [July 29, 2022, 8:22pm UTC](https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025 "2022-07-29T20:22:40Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![stanleycelestin1](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/stanleycelestin1/32/2931_2.png) [@stanleycelestin1](https://discuss.ray.io/u/stanleycelestin1)\
**Post date:** [July 29, 2022, 8:22pm UTC](https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025/1 "2022-07-29T20:22:40Z")

</div>

When Running

```auto
collective.init_collective_group(
           world_size=train.world_size(), 
           rank=train.local_rank(), 
           backend="gloo"
		   )

```

I get

```auto
AttributeError: module 'pygloo.rendezvous' has no attribute 'CustomStore'

```

How could this be?

---

<div class="post-metadata">

**Author:** ![Huaiwei\_Sun](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/huaiwei_sun/32/1316_2.png) [@Huaiwei\_Sun](https://discuss.ray.io/u/Huaiwei_Sun)\
**Post date:** [August 26, 2022, 5:08am UTC](https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025/2 "2022-08-26T05:08:04Z")

</div>

Hi, could you provide more info or provide us with a repro script?

cc: @matthewdeng Is this a ray train question?

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<div class="post-metadata">

**Author:** ![stanleycelestin1](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/stanleycelestin1/32/2931_2.png) [@stanleycelestin1](https://discuss.ray.io/u/stanleycelestin1)\
**Post date:** [August 26, 2022, 12:13pm UTC](https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025/3 "2022-08-26T12:13:07Z")

</div>

Hey @Huaiwei_Sun! I don’t have access to that code anymore but I was using Ray 1.13.

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<div class="post-metadata">

**Author:** ![matthewdeng](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/matthewdeng/32/1446_2.png) [@matthewdeng](https://discuss.ray.io/u/matthewdeng)\
**Post date:** [August 26, 2022, 11:27pm UTC](https://discuss.ray.io/t/attributeerror-module-pygloo-rendezvous-has-no-attribute-customstore/7025/4 "2022-08-26T23:27:59Z")

</div>

Looks like `CustomStore` was added to `pygloo` [a few months ago](https://github.com/ray-project/pygloo/pull/10), but was not [officially released](https://pypi.org/project/pygloo/#history).

In the meantime, if you run into this issue again you may workaround this by [building from source](https://github.com/ray-project/pygloo#building-from-source).