fluent/fluent-bit

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

Stars: 8.1k
Forks: 2k
Open beginner issues: 10
Indexed issues: 269
Avg merge: 3d 5h
Merged PRs (30d): 73

Dominant language: C
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

Open All

output stops under heavy input Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

fluent/fluent-bit#12451 · Opened Sep 21, 2026
Persistent memory growth with Tail filesystem storage on Fluent Bit 5.1.2, significantly mitigated by `storage.type: memory` Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

fluent/fluent-bit#12443 · 1 comment · 1 reaction · Opened Sep 19, 2026
Node Exporter Metrics Timestamp not set properly in OpenTelemetry push mode Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#12434 · Opened Sep 17, 2026
Too many open files [errno=24] Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

fluent/fluent-bit#12432 · 3 comments · Opened Sep 17, 2026
Azure Logs Ingestion API output doesn't split chunks into multiple requests to stay under payload size limit Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 55/100

fluent/fluent-bit#12409 · Opened Sep 15, 2026
out_gelf: UDP socket is never recreated after send() fails, all subsequent records are lost Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

fluent/fluent-bit#12394 · Opened Sep 10, 2026
Implement processor for journald to opentelemetry semantic mapping Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

fluent/fluent-bit#12383 · 2 comments · Opened Sep 7, 2026
Unable to Install Fluent-bit on Rockylinux 9 Open

status: waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 63/100

fluent/fluent-bit#12332 · 4 comments · 1 reaction · Opened Aug 25, 2026
Fluent Bit failed to build on Debian Bookworm Open

status: waiting-for-triage

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

fluent/fluent-bit#12323 · Opened Aug 24, 2026
docs: Missing SHA256 checksums for Windows MSI packages Open

status: waiting-for-triage

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

fluent/fluent-bit#12306 · Opened Aug 18, 2026
out_kafka: support record-derived Kafka message headers Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#12286 · Opened Aug 14, 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

Difficulty 3/5 1-2 days Newbie friendliness 70/100

fluent/fluent-bit#12283 · Opened Aug 13, 2026
parser.regex : key for all line Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

fluent/fluent-bit#12280 · 3 comments · Opened Aug 13, 2026
JSON encoder corrupts data, adds random memory contents to end of string Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 62/100

fluent/fluent-bit#12275 · 1 comment · Opened Aug 12, 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

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

fluent/fluent-bit#12270 · Opened Aug 12, 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

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

fluent/fluent-bit#12267 · Opened Aug 12, 2026
out_http: add an option to batch multiple chunks into a single request Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

fluent/fluent-bit#12253 · Opened Aug 10, 2026
Improve error logging for shared_key mismatch Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

fluent/fluent-bit#12246 · Opened Aug 7, 2026
Enhancement: Make kinesis_streams MAX_EVENT_SIZE configurable or support >1MB records Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

fluent/fluent-bit#12232 · Opened Aug 5, 2026
aws credentials: use-after-free when refresh races get_credentials() leading to SIGSEGV with multi-worker outputs (EKS/IRSA) Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

fluent/fluent-bit#12206 · 2 reactions · Opened Aug 3, 2026
Title: Fluent Bit 5.0.7 Forward output intermittently nests complete Forward batches inside another Forward batch Open

status: waiting-for-triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

fluent/fluent-bit#12200 · 2 comments · Opened Aug 3, 2026
out_azure_blob: no workload identity support, though out_azure_kusto has it Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

fluent/fluent-bit#12194 · Opened Aug 2, 2026
AWS Lambda extension support Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

fluent/fluent-bit#12191 · Opened Aug 1, 2026
Extended list for environment variables don't work Open

status: waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 58/100

fluent/fluent-bit#12177 · 1 comment · Opened Jul 30, 2026
filter_kubernetes: metadata fetch has no read timeout and can wedge the pipeline (in_tail flatlines) when the API/kubelet connection stalls Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

fluent/fluent-bit#12168 · Opened Jul 28, 2026
out_chronicle: support the new Chronicle API Open

enhancement exempt-stale

Difficulty 5/5 Over a week Newbie friendliness 45/100

fluent/fluent-bit#12157 · Opened Jul 24, 2026
in_tail: stale ignore_older description still says parser/record-level behavior Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

fluent/fluent-bit#12155 · Opened Jul 24, 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

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#12152 · Opened Jul 24, 2026
s3 output Buffer Full Even with buffer path is empty too Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

fluent/fluent-bit#12149 · 3 comments · Opened Jul 23, 2026
Router: conditional routes sharing an output — silent drop vs. duplicate delivery Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

fluent/fluent-bit#12144 · Opened Jul 23, 2026
Synchronous socket writes add one-second delays after EAGAIN Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

fluent/fluent-bit#12115 · Opened Jul 19, 2026
Dry-run segmentation faults in azure_blob, nats & kafka-rest output plugins Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

fluent/fluent-bit#12113 · 1 comment · Opened Jul 19, 2026
out_prometheus_exporter ignores HTTP server worker and buffer options Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

fluent/fluent-bit#12110 · Opened Jul 18, 2026
[log_to_metrics] add_label adds a dimension just like label_field, producing duplicate metrics Open

status: waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 62/100

fluent/fluent-bit#12107 · Opened Jul 16, 2026
Support the $TAG record accessor in processor/filter condition rules Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

fluent/fluent-bit#12103 · Opened Jul 15, 2026
in_prometheus_scrape never reuses TCP connections; root cause also affects flb_input_upstream_set() Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

fluent/fluent-bit#12094 · 2 comments · Opened Jul 13, 2026
in_tail & out_s3: Support for continuously growing files with strict ordering, sequential delivery, and atomic completeness Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

fluent/fluent-bit#12093 · Opened Jul 13, 2026
out_azure_blob: add `log_key` option Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

fluent/fluent-bit#12063 · 1 comment · Opened Jul 6, 2026
out_azure_blob: increase buffer dir name size to avoid truncating the directory Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

fluent/fluent-bit#12062 · Opened Jul 6, 2026
out_azure_blob: Auto create container Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

fluent/fluent-bit#12061 · Opened Jul 6, 2026
out_s3: $INDEX sequence index resets on restart because the metadata stream is deleted on shutdown (causes object overwrites) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

fluent/fluent-bit#11987 · 3 comments · Opened Jun 23, 2026
Add `ignore_missing_path` option to Tail input for optional log file globs Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

fluent/fluent-bit#11964 · 3 comments · Opened Jun 18, 2026
fluent-bit not updating pod metadata when pod restarts/updates Open

feature-request troubleshooting

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#11961 · 9 comments · Opened Jun 18, 2026
Deprecate SHA-1 and MD5 from Fluent Bit code paths Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

fluent/fluent-bit#11960 · Opened Jun 18, 2026
Persistent linear memory increase even after upgrading to 5.0.5 Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#11958 · 6 comments · Opened Jun 18, 2026
feat: flb_plugin_proxy input plugins should support metrics event type Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

fluent/fluent-bit#11914 · Opened Jun 4, 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

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#11905 · 3 comments · Opened Jun 3, 2026
[out_es] Id_Key + Write_Operation produces unparseable bulk body ("no requests added") on 4.2.4 Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#11876 · Opened May 28, 2026
Add Azure authentication module (MSI, Workload Identity, Service Principal) for azure_blob output plugin Open

Difficulty 5/5 Over a week Newbie friendliness 32/100

fluent/fluent-bit#11835 · 1 comment · Opened May 22, 2026
in_tail: Unable to detect rotation of the log file older than ignore_older Open

status: waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

fluent/fluent-bit#11828 · Opened May 19, 2026

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