ERROR download task failed: status: Internal, messagge: "invalid content length"

[zhantanfeng]

Bug report:

ERROR download task failed: status: Internal, messagge: "invalid content length", details: [], metadata:MetadataMap { headers: {"content-type": "application/grpc", "date": "Sat, 11 Oct 2025 07:09:32 GMT", "content-length": "0"}"}

Expected behavior:

The download image should have been downloaded back to the source, but the task creation failed, resulting in not being downloaded from Dragonfly

How to reproduce it:

Environment:

• Dragonfly version: v0.2.19
• OS: Ubuntu 22.04 LTS
• Kernel (e.g. uname -a): 5.15.0-89-generic Feature/dfget daemon boot #99-Ubuntu SMP Mon Oct 30 20:42:41 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
• Others:
  client-cm：
  dfdaemon.yaml: |-
  host:
  idc: ""
  location: ""
  server:
  cacheDir: /var/cache/dragonfly/dfdaemon/
  pluginDir: /var/lib/dragonfly/plugins/dfdaemon/
  download:
  concurrentPieceCount: 16
  pieceTimeout: 30s
  rateLimit: 50GiB
  server:
  requestRateLimit: 4000
  socketPath: /var/run/dragonfly/dfdaemon.sock
  upload:
  disableShared: false
  rateLimit: 50GiB
  server:
  port: 4000
  requestRateLimit: 4000
  manager:
  addr: http://dragonfly-manager.dragonfly-system.svc.x86test.shzhisuan.local:65003
  scheduler:
  announceInterval: 5m
  enableBackToSource: true
  maxScheduleCount: 5
  scheduleTimeout: 30s
  dynconfig:
  refreshInterval: 5m
  storage:
  dir: /var/lib/dragonfly/
  keep: true
  readBufferSize: 4194304
  writeBufferSize: 4194304
  gc:
  interval: 900s
  policy:
  distHighThresholdPercent: 80
  distLowThresholdPercent: 60
  taskTTL: 168h
  proxy:
  disableBackToSource: false
  prefetch: true
  prefetchRateLimit: 5GiB
  readBufferSize: 4194304
  registryMirror:
  addr: https://registry.x86test.shzhisuan.com
  rules:
  - regex: .*
  server:
  port: 4001
  health:
  server:
  port: 4003
  metrics:
  server:
  port: 4002
  stats:
  server:
  port: 4004

harbor: registry-cm
s3:
region: ***
bucket: registry
regionendpoint: http://***:8060
cache:
layerinfo: redis
maintenance:
uploadpurging:
enabled: false
delete:
enabled: true
redirect:
disable: false