deepseek-ai/deepseek-harness · error

workflow-worker-thread: refused child dispose failed: ${rend

Error message

workflow-worker-thread: refused child dispose failed: ${renderThrown(error)}

What it means

Error "workflow-worker-thread: refused child dispose failed: ${renderThrown(error)}" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/workflow/workflow-worker-thread/src/host.ts:380

            },
          }
          : {},
      })
    } catch (error: unknown) {
      const failure = this.childAdmissionFailure()
      this.post(HostToWorkerType.ChildStartError, {
        callId,
        rendered: failure?.rendered ?? renderThrown(error),
      })
      return
    }
    const failure = this.childAdmissionFailure()
    if (failure !== undefined) {
      this.post(HostToWorkerType.ChildStartError, { callId, rendered: failure.rendered })
      try {
        await run.dispose()
      } catch (error: unknown) {
        this.ctx.logger.warn(`workflow-worker-thread: refused child dispose failed: ${renderThrown(error)}`)
      }
      return
    }

    const record: ChildRecord = { run }
    this.children.set(callId, record)
    // Attach result forwarding before publishing the child handle. Because the
    // callback itself runs in a later microtask, ChildStarted is still posted
    // first even for an already-settled scripted provider.
    const forwardResult = run.result.then<() => void, () => void>(
      (result) => {
        try {
          const snapshot = snapshotJsonValue<ChildResult>({
            output: result.output,
            ...result.structured !== undefined ? { structured: result.structured } : {},
            stopReason: result.stopReason,
          })
          if (snapshot === undefined) throw new TypeError('child result is not losslessly JSON-serializable')

View on GitHub (pinned to b150a551b8)

Solutions

1. Manually terminate the leaked worker thread and fix the dispose path error before spawning more children.

When it happens

Trigger: Thrown at packages/workflow/workflow-worker-thread/src/host.ts:380 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/cbb9af15e966e18d. Report an issue: GitHub.