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[https://nvbugs/6104831][test] Add reproducers for broken-promise on disagg cancellation.#13639

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[https://nvbugs/6104831][test] Add reproducers for broken-promise on disagg cancellation.#13639
chienchunhung wants to merge 1 commit intoNVIDIA:mainfrom
chienchunhung:dev/sig1-broken-promise-test

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Please review the following before submitting your PR:

  • PR description clearly explains what and why. If using CodeRabbit's summary, please make sure it makes sense.

  • PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

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…disagg cancellation.

Signed-off-by: Chien-Chun Hung <2679986+chienchunhung@users.noreply.github.com>
chienchunhung added a commit to chienchunhung/TensorRT-LLM that referenced this pull request Apr 30, 2026
…rmanent wedge

Document the multi-signature disaggregated-serving wedge surfaced by the
rc11 deployment. The report covers the 1P1D reproducer harness, the six
labelled failure signatures (sender-side broken-promise after ready,
trie cascade-prune assertion, decode-side bad optional access, gen-side
checkGenTransferStatus blocking on at_least_num=1, receiver-side queued
cancel broken-promise, and the suspected control-path send stall),
their mapping to chained test/fix PR pairs (NVIDIA#13571/NVIDIA#13572 for sig NVIDIA#2,
NVIDIA#13639/NVIDIA#13640 for sig #1), the in-flight fixes for sig NVIDIA#4 and sig NVIDIA#5,
and the relationship to the unrelated companion fixes NVIDIA#12718 and NVIDIA#13119
which are not in rc11. Includes an investigation timeline that explains
why each signature surfaced only after the previous one was fixed, and
a test-coverage analysis of why the existing unit and integration tests
did not catch any of these bugs.

Signed-off-by: Chien-Chun Hung <2679986+chienchunhung@users.noreply.github.com>
Made-with: Cursor
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