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cuda_copy excluded from RMA BW lanes when peer-failure error handling is enabled

Bug

Status: Open.

#11318 In openucx/ucx;

· pentschev opened on Apr 1, 2026

Question about UCX_CONNECT_ALL_TO_ALL

Status: Open.

#11284 In openucx/ucx;

· Morifolium opened on Mar 23, 2026

Inconsistent pair-wise osu alltoallv latency between H200s due to intra-node mlx5 transport

Bug

Status: Open.

#11282 In openucx/ucx;

· vitduck opened on Mar 22, 2026

Supporting Linux kernel TCP zero-copy functionality

Status: Open.

#11260 In openucx/ucx;

· tohojo opened on Mar 13, 2026

Question on using NIXL+UCX+CUDA on machines with 2 CX7 and 8 GPUs

Bug

Status: Open.

#11259 In openucx/ucx;

· Morifolium opened on Mar 13, 2026

ucx-cuda DEB package Recommends pulls in mismatched NVIDIA driver libraries, breaking existing GPU environments

Bug

Status: Open.

#11257 In openucx/ucx;

· amahussein opened on Mar 12, 2026

Assertion `worker->keepalive.iter == &worker->all_eps' failed

Bug

Status: Open.

#11217 In openucx/ucx;

· ivanallen opened on Feb 27, 2026

UCS log rotation caused coredump

Bug

Status: Open.

#11214 In openucx/ucx;

· MyCproject opened on Feb 26, 2026

On Azure HBv5 (AMD MI300C) IntelMPI oneAPI (all version) crash when UCX terminates after unhandled SIGSEGV at libibvesbs form faulty libfabric "provider"

Bug

Status: Open.

#11197 In openucx/ucx;

· drmichaeltcvx opened on Feb 19, 2026

Unclear GPUDirect RDMA behavior when GPU and RoCE v2 NIC are on different NUMA nodes

Status: Open.

#11121 In openucx/ucx;

· hahahannes opened on Jan 15, 2026

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