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ishandhanani merged 3 commits into from
Sep 17, 2026
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docs: correct fault-tolerance architecture details #14880

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fix: minor doc updates
elizabetht Sep 15, 2026
a2bd7d9
Merge branch 'main' into fix/minor-doc-updates
elizabetht Sep 17, 2026
7002df4
Merge branch 'main' into fix/minor-doc-updates
ishandhanani Sep 17, 2026
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2 changes: 1 addition & 1 deletion ...de/knowledge-base/concepts/fault-tolerance/request-cancellation-architecture.md
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Expand Up @@ -22,7 +22,7 @@ In both cases, the frontend cancels the request's `AsyncEngineContext`, which pr

### Worker Cancellation Detection

On the worker side, the runtime monitors the TCP connection from the frontend for cancellation signals. The worker detects cancellation in three scenarios:
On the worker side, the runtime monitors the TCP connection from the frontend for cancellation signals. The worker detects cancellation in two scenarios:

1. **Control message received** — The frontend explicitly sent a cancellation control message.
2. **TCP connection dropped** — The frontend disconnected without sending a control message (e.g., frontend crash or network failure).
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2 changes: 1 addition & 1 deletion ...guide/knowledge-base/concepts/fault-tolerance/request-migration-architecture.md
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Expand Up @@ -11,7 +11,7 @@ This is an architecture reference. For how to enable and tune migration, its ben

## Overview

Request migration is implemented through a Migration operator that sits in the LLM processing pipeline between the Backend operator and the service backend. When a worker fails during request processing, the migration system preserves the partial generation state and recreates the request on a new worker to continue from where the previous worker left off.
Request migration is implemented through a Migration operator that sits in the LLM processing pipeline between the frontend preprocessing and the service backend. When a worker fails during request processing, the migration system preserves the partial generation state and recreates the request on a new worker to continue from where the previous worker left off.

## Architecture Components

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