deepseek-ai/deepseek-harness · error

session projection cache: ${trigger} write for "${session.id

Error message

session projection cache: ${trigger} write for "${session.id}" failed (cache stays stale): ${String(error)}

What it means

Error "session projection cache: ${trigger} write for "${session.id}" failed (cache stays stale): ${String(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/session/session-projection-cache/src/index.ts:249

    // Clear pending timers with the plugin (their sessions outlive the cache).
    this.ctx.effect(() => () => {
      for (const state of this.dirty.values()) {
        if (state.timer !== undefined) clearTimeout(state.timer)
      }
      this.dirty.clear()
    }, 'sessionProjectionCache.timers')
  }

  /**
   * One fail-soft durable checkpoint. Every caller has work by construction:
   * the throttle triggers only fire dirty (markClean clears the timer with
   * the counter) and the two mandatory points write unconditionally.
   */
  private async flushSoft(session: Session, trigger: string): Promise<void> {
    try {
      await this.write(session)
    } catch (error) {
      this.ctx.logger.warn(`session projection cache: ${trigger} write for "${session.id}" failed (cache stays stale): ${String(error)}`)
    }
  }

  /** Reset one session's dirty bookkeeping (its checkpoint is being written). */
  private markClean(session: Session): void {
    const state = this.dirty.get(session)
    if (state === undefined) return
    state.pending = 0
    if (state.timer !== undefined) {
      clearTimeout(state.timer)
      state.timer = undefined
    }
  }

  /** Replace one session's stored record with its log identity and a detached snapshot of `rows`. */
  private async put(id: SessionId, identity: CheckpointIdentity, rows: ProjectionCheckpoint): Promise<void> {
    const detached = snapshotJsonValue(rows)
    if (detached === undefined) {

View on GitHub (pinned to b150a551b8)

Solutions

1. Check the projection cache storage (path, permissions, disk); the cache stays stale until a write succeeds.

When it happens

Trigger: Thrown at packages/session/session-projection-cache/src/index.ts:249 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/3121494cade0a9fb. Report an issue: GitHub.