{
  "id": "grpc/client-side-streaming-cancel",
  "signature": "CANCELLED: grpc: client side streaming canceled by client",
  "signature_zh": "CANCELLED: grpc: 客户端流式调用被客户端取消",
  "regex": "CANCELLED: grpc: client side streaming canceled by client",
  "domain": "grpc",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "Client explicitly cancels a streaming RPC (e.g., via context cancel or stream.CloseSend) before server finishes processing, often due to timeout or early exit.",
  "root_cause_type": "generic",
  "root_cause_zh": "客户端显式取消了一个流式RPC（例如通过context取消或stream.CloseSend），在服务器完成处理之前，通常由于超时或提前退出。",
  "versions": [
    {
      "version": "gRPC Python 1.60+",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "gRPC Java 1.60+",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "gRPC Node 1.10+",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Adding longer timeouts to all RPCs",
      "why_fails": "The cancellation is intentional from client logic; longer timeouts only mask the symptom and may cause resource leaks.",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    },
    {
      "action": "Ignoring the error and retrying immediately",
      "why_fails": "Retrying without fixing the cancel logic may loop indefinitely or waste resources.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Check server-side handling of client cancel: ensure server reads from stream until EOF and handles context cancellation gracefully. In Python: for request in stub.StreamingCall(...): try: process(request) except grpc.RpcError as e: if e.code() == grpc.StatusCode.CANCELLED: break",
      "success_rate": 0.85,
      "how": "Check server-side handling of client cancel: ensure server reads from stream until EOF and handles context cancellation gracefully. In Python: for request in stub.StreamingCall(...): try: process(request) except grpc.RpcError as e: if e.code() == grpc.StatusCode.CANCELLED: break",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use a graceful shutdown pattern: before canceling, call stream.CloseSend() and wait for server response. In Go: if err := stream.CloseSend(); err != nil { log.Fatal(err) } for { _, err := stream.Recv(); if err == io.EOF { break } }",
      "success_rate": 0.8,
      "how": "Use a graceful shutdown pattern: before canceling, call stream.CloseSend() and wait for server response. In Go: if err := stream.CloseSend(); err != nil { log.Fatal(err) } for { _, err := stream.Recv(); if err == io.EOF { break } }",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Check server-side handling of client cancel: ensure server reads from stream until EOF and handles context cancellation gracefully. In Python: for request in stub.StreamingCall(...): try: process(request) except grpc.RpcError as e: if e.code() == grpc.StatusCode.CANCELLED: break",
    "Use a graceful shutdown pattern: before canceling, call stream.CloseSend() and wait for server response. In Go: if err := stream.CloseSend(); err != nil { log.Fatal(err) } for { _, err := stream.Recv(); if err == io.EOF { break } }"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://grpc.io/docs/guides/error-handling/",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.85,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-01-10",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}