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Support combined expert and data parallelism in TrainerRank

Status: Open.

#917 In OpenPipe/ART;

· bradhilton opened on Sep 16, 2026

Support pipeline parallelism in TrainerRank without exposing stage scheduling to callers

Status: Open.

#916 In OpenPipe/ART;

· bradhilton opened on Sep 16, 2026

Investigate output and gradient variability between matched same-source Qwen TrainerRank actors

Status: Open.

#902 In OpenPipe/ART;

· bradhilton opened on Sep 15, 2026

Investigate large hidden-state differences when independent requests are co-packed (Qwen3.6, no-grad)

Status: Open.

#901 In OpenPipe/ART;

· bradhilton opened on Sep 15, 2026

Retained sampled suffix can carry logprobs under a different causal prefix

Status: Open.

#883 In OpenPipe/ART;

· bradhilton opened on Sep 10, 2026

TrainerRank reusable-cache admission can leave insufficient physical CUDA memory for backward library allocations

Status: Open.

#870 In OpenPipe/ART;

· bradhilton opened on Sep 9, 2026

Determine whether a large dynamics RL batch refusal is necessary or avoidable by execution layout

Status: Open.

#869 In OpenPipe/ART;

· bradhilton opened on Sep 9, 2026

Qwen3.5-35B-A3B at EP1 with CP>1 segfaults in Transformer Engine's grouped GEMM on real-data routing (likely empty local experts)

Status: Open.

#851 In OpenPipe/ART;

· bradhilton opened on Sep 4, 2026

Dedicated LocalBackend vLLM server can become unreachable during LoRA adapter reload

Status: Open.

#678 In OpenPipe/ART;

· arcticfly opened on May 12, 2026

Regression: forked GRPO run can produce malformed checkpoint outputs on newer ART ref

bugSomething isn't workingSomething isn't working

Status: Open.

#672 In OpenPipe/ART;

· arcticfly opened on May 8, 2026

LoRA adapters are not properly syncing when using LocalBackend - stale adapters are being used in rollouts

Status: Open.

#661 In OpenPipe/ART;

· gmanlan opened on Apr 24, 2026

LocalBackend fork_checkpoint doesn't update vLLM's initial LoRA

Status: Open.

#651 In OpenPipe/ART;

· arcticfly opened on Apr 13, 2026