deepseek-ai/deepseek-harness · error · Error

session "${entry.id}" was already announced

Error message

session "${entry.id}" was already announced

What it means

Error "session "${entry.id}" was already announced" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/core/session/src/index.ts:971

    // later same-id lifecycle.
    /* v8 ignore next -- enter() rejects replacement while this single-shot detach capability is live. */
    if (this.store.get(entry.id) !== entry) return
    this.store.delete(entry.id)
    attachments.delete(entry.session)
    if (entry.announced) this.emitDisposed(entry)
  }

  /** Emit `session/created` exactly once for an {@link enter}ed session (with
   * the carrier {@link enter} captured). Separate from {@link enter} so the
   * caller can yield the detach disposer first (rollback safety — see
   * {@link enter}).
   * @param session - the entered session to announce to listeners.
   * @throws if the session is not live or its announcement already began,
   *   including a reentrant call from a creation listener. */
  announce(session: Session): void {
    const entry = this.liveEntryFor(session)
    if (entry.announced || entry.announcing) {
      throw new Error(`session "${entry.id}" was already announced`)
    }
    // Mark before emit: Cordis emit may deliver to earlier listeners and then
    // throw. Rollback must still pair that partial creation with disposal, and
    // a listener cannot recursively create a second lifecycle edge.
    entry.announced = true
    const callbackArgs: unknown[] = [session]
    entry.announcing = true
    try {
      const callbacks = collectSessionCallbacks(this.ctx, [entry.carrier, 'session/created', session])
      for (const callback of callbacks) {
        // Synchronous throws intentionally propagate and veto publication; the
        // yielded detach then emits the paired disposal edge. An async function
        // is nevertheless assignable to a void listener, so observe its returned
        // promise: rejection is too late to roll back and must be logged instead
        // of becoming unhandled.
        const returned: unknown = callback(...callbackArgs)
        void Promise.resolve(returned).catch((error: unknown) => {
          this.ctx.logger.warn(`session "${entry.id}": session/created listener rejected: ${String(error)}`)

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/core/session/src/index.ts:971 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/6fd95833be0caaec. Report an issue: GitHub.