fluent/fluent-bit

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Fast and Lightweight Logs, Metrics and Traces processor for Linux, BSD, OSX and Windows

Stars: 8.1k
Forks: 2k
Open beginner issues: 0
Indexed issues: 267
Avg merge: 4d 20h
Merged PRs (30d): 71

Dominant language: C
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

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259 open issues indexed

[critical] fluent-bit killed by OOM when reaching cpu limit Open

status: waiting-for-triage

fluent/fluent-bit#11745 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
logdna output includes the full log event in the line field Open

bug

fluent/fluent-bit#11754 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Port exhaustion on Windows under load Open

enhancement long-term Windows

fluent/fluent-bit#11790 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Windows Only] Agent v5+ APPCRASH (Heap Corruption 0xc0000374) and TCP Socket Hang with Upstream Swarm Open

status: waiting-for-triage Windows

fluent/fluent-bit#11798 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Regression] 4.2.4: opensearch output sustained flush failures, ~60% ingestion rate drop vs 4.2.3 Open

fluent/fluent-bit#11799 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Feasibility of Running Fluent Bit as Non-Root User Open

not-an-issue question

fluent/fluent-bit#11807 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
TLS handshakes failure when connecting to a specific rsyslog server via IPv6 Open

bug fixed

fluent/fluent-bit#11815 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
TLS version negotiation issue Open

status: waiting-for-triage

fluent/fluent-bit#11817 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
in_tail: Unable to detect rotation of the log file older than ignore_older Open

status: waiting-for-triage

fluent/fluent-bit#11828 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add Azure authentication module (MSI, Workload Identity, Service Principal) for azure_blob output plugin Open

fluent/fluent-bit#11835 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[out_es] Id_Key + Write_Operation produces unparseable bulk body ("no requests added") on 4.2.4 Open

status: waiting-for-triage

fluent/fluent-bit#11876 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
# Windows (v5.0.6): out-of-bounds heap write in monkey libevent backend (`cb_event`) under high event load — out_forward to an unreachable upstream Open

enhancement long-term status: waiting-for-triage Windows

fluent/fluent-bit#11905 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
feat: flb_plugin_proxy input plugins should support metrics event type Open

fluent/fluent-bit#11914 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Persistent linear memory increase even after upgrading to 5.0.5 Open

status: waiting-for-triage

fluent/fluent-bit#11958 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Deprecate SHA-1 and MD5 from Fluent Bit code paths Open

fluent/fluent-bit#11960 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
fluent-bit not updating pod metadata when pod restarts/updates Open

feature-request troubleshooting

fluent/fluent-bit#11961 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add `ignore_missing_path` option to Tail input for optional log file globs Open

fluent/fluent-bit#11964 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_s3: $INDEX sequence index resets on restart because the metadata stream is deleted on shutdown (causes object overwrites) Open

fluent/fluent-bit#11987 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add tls.crl_file support for TLS certificate revocation checks Open

fluent/fluent-bit#12060 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_azure_blob: Auto create container Open

fluent/fluent-bit#12061 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_azure_blob: increase buffer dir name size to avoid truncating the directory Open

fluent/fluent-bit#12062 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_azure_blob: add `log_key` option Open

fluent/fluent-bit#12063 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
in_tail & out_s3: Support for continuously growing files with strict ordering, sequential delivery, and atomic completeness Open

fluent/fluent-bit#12093 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
in_prometheus_scrape never reuses TCP connections; root cause also affects flb_input_upstream_set() Open

fluent/fluent-bit#12094 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Support the $TAG record accessor in processor/filter condition rules Open

fluent/fluent-bit#12103 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[log_to_metrics] add_label adds a dimension just like label_field, producing duplicate metrics Open

status: waiting-for-triage

fluent/fluent-bit#12107 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_prometheus_exporter ignores HTTP server worker and buffer options Open

fluent/fluent-bit#12110 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Dry-run segmentation faults in azure_blob, nats & kafka-rest output plugins Open

bug

fluent/fluent-bit#12113 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Synchronous socket writes add one-second delays after EAGAIN Open

fluent/fluent-bit#12115 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Router: conditional routes sharing an output — silent drop vs. duplicate delivery Open

fluent/fluent-bit#12144 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_azure_kusto: avoid logging workload identity token at info level Open

status: waiting-for-triage

fluent/fluent-bit#12145 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
s3 output Buffer Full Even with buffer path is empty too Open

status: waiting-for-triage

fluent/fluent-bit#12149 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
kubernetes filter: SIGSEGV when two filter instances enable pod association (Use_Pod_Association) — regression in 5.0.5, still present in 5.0.9 Open

status: waiting-for-triage

fluent/fluent-bit#12152 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
in_tail: stale ignore_older description still says parser/record-level behavior Open

fluent/fluent-bit#12155 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_chronicle: support the new Chronicle API Open

enhancement exempt-stale

fluent/fluent-bit#12157 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
filter_kubernetes: metadata fetch has no read timeout and can wedge the pipeline (in_tail flatlines) when the API/kubelet connection stalls Open

fluent/fluent-bit#12168 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Extended list for environment variables don't work Open

status: waiting-for-triage

fluent/fluent-bit#12177 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
AWS Lambda extension support Open

fluent/fluent-bit#12191 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_azure_blob: no workload identity support, though out_azure_kusto has it Open

fluent/fluent-bit#12194 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Title: Fluent Bit 5.0.7 Forward output intermittently nests complete Forward batches inside another Forward batch Open

status: waiting-for-triage

fluent/fluent-bit#12200 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
aws credentials: use-after-free when refresh races get_credentials() leading to SIGSEGV with multi-worker outputs (EKS/IRSA) Open

fluent/fluent-bit#12206 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Enhancement: Make kinesis_streams MAX_EVENT_SIZE configurable or support >1MB records Open

fluent/fluent-bit#12232 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improve error logging for shared_key mismatch Open

fluent/fluent-bit#12246 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_http: add an option to batch multiple chunks into a single request Open

fluent/fluent-bit#12253 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_s3 to GCS: successful uploads (HTTP 200) judged as failed — `header_lookup()` matches `x-goog-stored-content-length` instead of `Content-Length` (explains #8525) Open

status: waiting-for-triage

fluent/fluent-bit#12267 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_s3: current_buffer_size underflows after deleting buffer files recovered from a previous run — every new chunk is then rejected with "Buffer is full" Open

status: waiting-for-triage

fluent/fluent-bit#12270 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
JSON encoder corrupts data, adds random memory contents to end of string Open

status: waiting-for-triage

fluent/fluent-bit#12275 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
parser.regex : key for all line Open

fluent/fluent-bit#12280 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
fluent-bit k8s events input causes crashes (SIGSEGV) in the in_kubernetes_events while processing the Kubernetes watch stream Open

status: waiting-for-triage

fluent/fluent-bit#12283 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
out_kafka: support record-derived Kafka message headers Open

fluent/fluent-bit#12286 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

fluent/fluent-bit

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