sgl-project/sglang · warning · DeprecationWarning

sglang.srt.layers.attention.nsa.nsa_backend_mtp_precompute i

Error message

sglang.srt.layers.attention.nsa.nsa_backend_mtp_precompute is deprecated; use sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute instead.

What it means

DeprecationWarning raised on import of the old nsa_backend_mtp_precompute shim; the module now lives at sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute. The old file star-re-exports the new one, so functionality is identical until removal.

Source

Thrown at python/sglang/srt/layers/attention/nsa/nsa_backend_mtp_precompute.py:4

# [Deprecated] Re-export shim for backward compatibility. Use dsa.dsa_backend_mtp_precompute instead.
import warnings

warnings.warn(
    "sglang.srt.layers.attention.nsa.nsa_backend_mtp_precompute is deprecated; "
    "use sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute instead.",
    DeprecationWarning,
    stacklevel=2,
)
from sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute import *  # noqa: F401, F403

View on GitHub (pinned to 0132848349)

Solutions

1. Import from sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute
2. Rename any local modules that re-export the old path
3. Use python -W error to find all import sites in tests

Example fix

# before
from sglang.srt.layers.attention.nsa.nsa_backend_mtp_precompute import *
# after
from sglang.srt.layers.attention.dsa.dsa_backend_mtp_precompute import *

When it happens

Trigger: `import sglang.srt.layers.attention.nsa.nsa_backend_mtp_precompute` or importing its symbols (MTP precompute helpers) via the nsa package.

Common situations: MTP (multi-token prediction) precompute code written before the NSA→DSA rename; upgrading SGLang with local patches referencing the old module.

Related errors

• sglang.srt.layers.attention.nsa.dequant_k_cache is deprecate
• sglang.srt.layers.attention.nsa.index_buf_accessor is deprec
• sglang.srt.layers.attention.nsa.nsa_indexer is deprecated; u
• sglang.srt.layers.attention.nsa.quant_k_cache is deprecated;
• sglang.srt.layers.attention.nsa.tilelang_kernel is deprecate

AI-assisted analysis of sgl-project/sglang@0132848349 (2026-08-28). Data as JSON: /api/errors/9aa30e009de3915a. Report an issue: GitHub.