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ud_ep.c:714 Assertion `UCT_UD_PSN_COMPARE(ep->tx.acked_psn, <, ep->tx.psn)' failed: ep 0x1d767e0: flags=0x28 acked_psn=3 must be smaller than current_psn=1

Bug

Status: Open.

#11107 In openucx/ucx;

· ivanallen opened on Jan 9, 2026

Compute-sanitizer reports CUDA_ERROR_INVALID_CONTEXT (error 201) from UCT CUDA when calling MPI_Init

Bug

Status: Open.

#11104 In openucx/ucx;

· olilag opened on Jan 7, 2026

Question: bcopy / zcopy usage in ucp_tag_send

Status: Open.

#11097 In openucx/ucx;

· nbartelheimer opened on Jan 5, 2026

Performance regression due to "UCP/PROTO: Consider RNDV_PERF_DIFF"

Bug

Status: Open.

#11091 In openucx/ucx;

· mkre opened on Jan 2, 2026

UCX shutdown sequence is crashing

Status: Open.

#11087 In openucx/ucx;

· maor-lb opened on Dec 31, 2025

sys.c:1369 UCX ERROR pthread_getaffinity_mp() failed Invalid argument

Bug

Status: Open.

#11074 In openucx/ucx;

· hpcpony opened on Dec 20, 2025

Build error in 1.19.1 with GCC 16 snapshop 2025-12-14

Bug

Status: Open.

#11061 In openucx/ucx;

· bertwesarg opened on Dec 15, 2025

GPU RDMA not working with Broadcom RoCE connected via PHB

Status: Open.

#11048 In openucx/ucx;

· hahahannes opened on Dec 10, 2025

Does cuda_ipc support GPU cards without NVLink?

Status: Open.

#11046 In openucx/ucx;

· Jeffwan opened on Dec 10, 2025

failed cross compile musl

Bug

Status: Open.

#11044 In openucx/ucx;

· predators46 opened on Dec 8, 2025

UCX ignores Linux policy routing inside netns and always uses <code>main</code> routing table

Bug

Status: Open.

#11035 In openucx/ucx;

· Xunzhuo opened on Dec 3, 2025

Under UCS_THREAD_MODE_SINGLE, pthread_spin_lock experiences severe contention.

Bug

Status: Open.

#11034 In openucx/ucx;

· ivanallen opened on Dec 3, 2025