Issues

• Windows service hangs in START_PENDING forever when startup fails (prepare_start error is ignored in run_service)

  Bug

  vectordotdev/vector#26526 · Filter by author rfdrew opened on Oct 1, 2026

• windows_event_log: process crashes with STATUS_HEAP_CORRUPTION (0xc0000374) when reading Microsoft-Windows-Hyper-V-VmSwitch-Operational on Windows Server 2022

  Bug

  vectordotdev/vector#26525 · Filter by author rfdrew opened on Oct 1, 2026

• disk buffer: reader can be notified before the data file write completes, delaying the sink's send

  vectordotdev/vector#26523 · Filter by author Aboussejra opened on Oct 1, 2026
  1

• json codec: option to encode byte values as base64

  Feature

  vectordotdev/vector#26514 · Filter by author Danielku15 opened on Sep 30, 2026

• Newline-delimited framing: EOF flush of an unterminated buffer silently merges misframed events — no WARN or metric

  Feature

  vectordotdev/vector#26511 · Filter by author paveljanda opened on Sep 29, 2026

• component_sent_bytes_total for the loki sink reports compressed bytes, unlike other sinks

  Bug

  vectordotdev/vector#26510 · Filter by author hillmandj opened on Sep 29, 2026

• TCP-based sources: idle connections starve busy connections (RequestLimiter capped at num_threads())

  Bug

  vectordotdev/vector#26492 · Filter by author thomasqueirozb opened on Sep 28, 2026

• Allow configuring the TCP listen backlog for server sources (currently fixed at 128 via tokio/mio)

  Feature

  vectordotdev/vector#26487 · Filter by author ronnocol opened on Sep 25, 2026

• opentelemetry source: OTLP/HTTP+JSON requests get 500 with a protobuf Debug-dump body instead of 415 (protobuf-only)

  source: opentelemetry
  Bug

  vectordotdev/vector#26456 · Filter by author paveljanda opened on Sep 22, 2026
  1

• websocket_server sink leaks its listener and fatally crashes Vector on reload when the address is reused

  sink: websocket_server
  Bug

  vectordotdev/vector#26442 · Filter by author paveljanda opened on Sep 21, 2026

• syslog source: max_length silently drops oversized messages (docs say "truncated"); UDP mode ignores max_length entirely

  Bug

  vectordotdev/vector#26439 · Filter by author paveljanda opened on Sep 20, 2026

• Vector file source preserves BOM as U+FEFF char and CRLF trailing CR in EVERY line

  vectordotdev/vector#26392 · Filter by author 28515graj opened on Sep 15, 2026

• abort "msg" reason only preserved with explicit reroute_dropped: true

  vectordotdev/vector#26391 · Filter by author 28515graj opened on Sep 15, 2026

• Doris Sink Error Log in verbose mode

  Feature

  vectordotdev/vector#26353 · Filter by author yorelog opened on Sep 11, 2026
  2

• NATS source declares can_acknowledge() = true while its docs declare acknowledgements: no, suppressing the end-to-end acknowledgement warning

  source: nats
  Bug

  vectordotdev/vector#26345 · Filter by author max-tet opened on Sep 10, 2026

• Drop_newest discards not recorded in buffer_received or buffer_discarded metrics for non blocking disk buffers

  Bug

  vectordotdev/vector#26325 · Filter by author jonahgetz opened on Sep 8, 2026

• Unix datagram socket source: batch reads with recvmmsg to cut syscall overhead

  vectordotdev/vector#26314 · Filter by author Aboussejra opened on Sep 7, 2026

• feat(nats source): Support End-to-End Acknowledgements (BatchNotifier) for JetStream

  Feature

  vectordotdev/vector#26311 · Filter by author prafful1234 opened on Sep 5, 2026
  1

• Elasticsearch sink: log the original event content on non-retryable/dropped failures (like Logstash's :action=> field)

  Feature

  vectordotdev/vector#26294 · Filter by author vladislavlopatin255 opened on Sep 3, 2026

• Elasticsearch sink: ComponentEventsDropped/CallError reports the full pre-retry batch size instead of the actual dropped-item count after RetryPartial

  Bug

  vectordotdev/vector#26293 · Filter by author vladislavlopatin255 opened on Sep 3, 2026

• Disk buffer startup fails permanently when seek hits decode error (InvalidProtobufPayload)

  vectordotdev/vector#26231 · Filter by author apurvanisal5 opened on Aug 26, 2026

• prometheus_remote_write source: skip_nan_values does not cover histogram/summary counts, stale-marker NaN still 400s the whole request

  vectordotdev/vector#26228 · Filter by author oivindoh opened on Aug 26, 2026

• disk_v2 permanently drops and acknowledges all events in an oversized EventArray

  domain: buffers
  Bug

  vectordotdev/vector#26198 · Filter by author dikuchan opened on Aug 25, 2026
  3

• vdev example-config generator emits invalid configs for mutually-exclusive-but-optional fields

  type: tech debt
  Enhancement

  vectordotdev/vector#26175 · Filter by author thomasqueirozb opened on Aug 21, 2026

• Semantic meaning is taken from the wrong input when a multi-input transform feeds another transform — nondeterministic per process

  vectordotdev/vector#26161 · Filter by author czd890 opened on Aug 20, 2026