sgl-project/sglang · warning · DeprecationWarning

sglang.srt.layers.attention.nsa.utils is deprecated; use sgl

Error message

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

What it means

DeprecationWarning from the nsa.utils compat shim: utils moved to sglang.srt.layers.attention.dsa.utils (still under srt.layers, unlike the kernel modules moved to sglang.kernels). The shim star-imports the new module.

Source

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

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

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

View on GitHub (pinned to 0132848349)

Solutions

1. Import from sglang.srt.layers.attention.dsa.utils
2. Update all `nsa.utils` references project-wide
3. Watch for the removal release and migrate before upgrading to it

Example fix

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

When it happens

Trigger: `import sglang.srt.layers.attention.nsa.utils` or from-imports of its helpers.

Common situations: Utility imports for sparse attention bookkeeping on older code paths after upgrading SGLang.

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_backend_mtp_precompute i
• sglang.srt.layers.attention.nsa.nsa_indexer is deprecated; u
• sglang.srt.layers.attention.nsa.quant_k_cache is deprecated;

AI-assisted analysis of sgl-project/sglang@0132848349 (2026-08-28). Data as JSON: /api/errors/871cdac41ac7bdd1. Report an issue: GitHub.