ucp_worker.c:728 Assertion `wiface->activate_count > 0' failed: iface 0x43f3800 (tcp/lo)

[ivanallen]

Describe the bug

Backgroud: #10370

An assert occurs on the server when the client establishes a connection with the server.

What could possibly be the cause?

Steps to Reproduce

• UCX version used: ucx 1.17

Setup and versions

• OS version (e.g Linux distro) + CPU architecture (x86_64/aarch64/ppc64le/...)

Linux node223 4.18.0-305.3.1.el8_4.x86_64 #1 SMP Thu Jun 17 07:52:48 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

[yosefe]

Can you pls try UCX version 1.18 or master branch? There were few related fixed.

[ivanallen]

Hi, @yosefe

After I upgraded to 1.18.0, it seems that the communication between 1.17.0 and 1.18.0 is not compatible?

[yosefe]

Hi, @yosefe

After I upgraded to 1.18.0, it seems that the communication between 1.17.0 and 1.18.0 is not compatible?

This is possible. What is the error, and are there any UCX env var being used?

[ivanallen]

Hi, @yosefe
After I upgraded to 1.18.0, it seems that the communication between 1.17.0 and 1.18.0 is not compatible?

This is possible. What is the error, and are there any UCX env var being used?

Thanks.

Since the product is not currently in production, I have forced the upgrade to 1.18.0. I think we can close this issue.