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Fluentd

v1.20.0Observability
2026년 10월 26일

CHECK 2OTHER 30

설정 및 플랫폼 기능을 확장하고 JIT 기본 동작을 바꾼 릴리스입니다. `Ruby 3.2` 지원을 중단하며 입력, 버퍼링, HTTP 처리에서 발생하던 정확성 문제를 수정했습니다.

영향 확인 (2)

  • breakingenable_jit 기본값 변경

    enable_jit을 설정하지 않은 경우 적용됩니다.

    시스템 설정 enable_jit의 기본값이 true로 변경됩니다.

  • breakingRuby 3.2 지원 중단

    Ruby 3.2를 실행하는 경우 적용됩니다.

    Ruby 3.2 지원을 중단합니다.

그 외 기록된 변경 30건 전체fixes 15 · additions 10 · constraints 2 · removals 2 · value changes 1

fixes (15)

  • Fix IPv6 bind address support in URI construction
  • out_file: create symlinks for all chunks sharing the latest timekey
  • time: fix TimeFormatter returning nil for the Unix epoch
  • in_tail: fix log duplication when a rotated file is appended during rotate_wait with follow_inodes
  • in_tail: fix NameError raised when flushing buffered lines with emit_unmatched_lines true
  • in_tail: fix unread lines never being collected when a throttled file is removed from the watch list
  • in_tail: fix shutdown errors and timeouts caused by an ongoing watcher refresh
  • in_tail: fix closed stream error when file rotation overlaps with shutdown
  • in_tail: use a monotonic clock for multiline flush timers so that they are not affected by wall-clock adjustments
  • buffer: fix a race that could make the buffer stage_size gauge transiently negative while a write and a chunk enqueue overlap
  • buffer: fix an enqueued unstaged file chunk being re-staged and flushed twice, which caused closed stream / ENOENT errors and leaked buffer size gauges
  • parser_msgpack: fix leftover data from one parse call leaking into the next
  • http_server helper: fix HTTP endpoints never recovering after a bind failure
  • root_agent: fix emit_records and emit_size never counted for inputs with @label
  • supervisor: fix graceful config reload failing for YAML configuration

additions (10)

  • out_forward: add send_keepalive_packet option to enable TCP keepalive (SO_KEEPALIVE)
  • in_exec: add command_timeout option to limit child process execution time
  • system_config: add umask option to <system> directive
  • add opt-in enable_dir_watcher and dir_watcher_limit to discover new files earlier by watching directories×2
  • in_tail: add opt-in worker-thread parsing via num_threads to offload parsing from the event loop
  • In worker mode, monitor_agent also reports worker_pending_batch_count, worker_pending_bytes and worker_parse_error_count.
  • buffer: add evacuate_limit_size to keep evacuated chunks from filling the disk
  • gem: add aarch64-mingw-ucrt gem
  • gem: add json gem (>= 2.21) as runtime dependency and remove Refinements workaround

constraints (2)

  • parser_syslog: accept a space after RFC3164 priority
  • in_forward: accept metadata on encapsulated timestamps sent by Fluent Bit v5.0.5 or later

removals (2)

  • Replace Yajl with built-in JSON for simple cases
  • out_http: remove the Net::HTTP extra_chain_cert monkey patch

value changes (1)

  • When an input stream ends in the middle of a JSON document, Fluentd now logs a warning and discards the incomplete tail instead of raising ParseError.
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