{"record":{"id":"ad680264a8e7e63e","repo":"vxcontrol/pentagi","slug":"stop-timed-out-after-s-the-task-may-still-be-wi","errorCode":null,"errorMessage":"stop timed out after %s — the task may still be winding down. Call %s to check the current state before proceeding","messagePattern":"stop timed out after (.+?) — the task may still be winding down\\. Call (.+?) to check the current state before proceeding","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"backend/pkg/tools/flow_manager.go","lineNumber":645,"sourceCode":"\n\tisRunning := false\n\tfor _, task := range tasks {\n\t\tif task.Status == database.TaskStatusRunning {\n\t\t\tisRunning = true\n\t\t\tbreak\n\t\t}\n\t}\n\n\tif !isRunning {\n\t\treturn \"No running task found — the flow is already in 'waiting' state and ready to accept input.\", nil\n\t}\n\n\tstopCtx, stopCancel := context.WithTimeout(ctx, flowOperationTimeout)\n\tdefer stopCancel()\n\n\tif err := t.handler(stopCtx, action.Reason); err != nil {\n\t\tif errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {\n\t\t\treturn \"\", fmt.Errorf(\n\t\t\t\t\"stop timed out after %s — the task may still be winding down. \"+\n\t\t\t\t\t\"Call %s to check the current state before proceeding\",\n\t\t\t\tflowOperationTimeout, GetFlowStatusToolName)\n\t\t}\n\t\treturn \"\", fmt.Errorf(\"failed to stop flow: %w\", err)\n\t}\n\n\t// Re-query task statuses to report the actual state the flow reached.\n\tnewTasks, err := t.db.GetFlowTasks(ctx, t.flowID)\n\tif err != nil {\n\t\t// Stop succeeded but we cannot verify the new state — return a safe partial message.\n\t\treturn fmt.Sprintf(\n\t\t\t\"Flow stop initiated (reason: %s). Could not verify new status: %s. \"+\n\t\t\t\t\"Call %s to confirm before proceeding.\",\n\t\t\taction.Reason, err, GetFlowStatusToolName), nil\n\t}\n\n\tfor _, task := range newTasks {","sourceCodeStart":627,"sourceCodeEnd":663,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/flow_manager.go#L627-L663","documentation":"The stop handler was given a bounded context (flowOperationTimeout) and returned context.DeadlineExceeded or context.Canceled, so stop_flow could not confirm the flow stopped within the operation window. The message is deliberately advisory: the stop may still complete asynchronously, and the caller is told to re-check with get_flow_status.","triggerScenarios":"Calling stop_flow when the underlying flow shutdown takes longer than flowOperationTimeout (graceful in-flight tool execution finishing), or the handler's context is cancelled externally during the stop.","commonSituations":"Stopping a flow whose executor is mid-command in a Docker sandbox; long-running terminal commands that ignore cancellation; heavily loaded backend slowing the shutdown path.","solutions":["Call get_flow_status to check whether the flow actually stopped; it may have finished after the timeout.","Wait a few seconds and call stop_flow again if it is still running.","Check for long-running containers/commands in the flow's sandbox and terminate them if the flow refuses to wind down.","Inspect backend logs to see whether the stop handler completed after the deadline."],"exampleFix":"// after a stop timeout, verify before retrying\nconst status = await getFlowStatus(flowId);\nif (status === 'running') {\n  await stopFlow(flowId, 'retry stop');\n}","handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n  await tool.call('stop_flow', { reason: 'stop requested' });\n} catch (err) {\n  if (String(err).includes('stop timed out')) {\n    // stop may complete async: verify, then retry if still running\n    const status = await tool.call('get_flow_status', { detail: 'running' });\n    if (stillRunning(status)) await tool.call('stop_flow', { reason: 'retry stop' });\n  }\n}","preventionTips":["Always re-check with get_flow_status after a stop timeout","Allow graceful wind-down: wait before retrying stop","Avoid launching very long commands that ignore cancellation","Monitor backend logs for slow shutdown paths"],"tags":["timeout","cancellation","flow-stop","docker"],"backgroundTag":"operation-timeout","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}