Fluent Bit 4.0.3 using http plugin sink log to opensearch, randomly restart, [engine] caught signal (SIGSEGV) #10458
Description
Bug Report
Describe the bug
Fluentbit 4.0.3 pod restarts randomly causing caught signal (SIGSEGV)
To Reproduce
- Rubular link if applicable:
- Example log message if applicable:
Fluent Bit v4.0.3
* Copyright (C) 2015-2025 The Fluent Bit Authors
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
* https://fluentbit.io/
______ _ _ ______ _ _ ___ _____
| ___| | | | | ___ (_) | / || _ |
| |_ | |_ _ ___ _ __ | |_ | |_/ /_| |_ __ __/ /| || |/' |
| _| | | | | |/ _ \ '_ \| __| | ___ \ | __| \ \ / / /_| || /| |
| | | | |_| | __/ | | | |_ | |_/ / | |_ \ V /\___ |\ |_/ /
\_| |_|\__,_|\___|_| |_|\__| \____/|_|\__| \_/ |_(_)___/
[2025/06/10 19:24:38] [engine] caught signal (SIGSEGV)
#0 0x55e0ba9b9988 in prepare_destroy_conn_safe() at src/flb_upstream.c:549
#1 0x55e0ba9b9988 in flb_upstream_conn_release() at src/flb_upstream.c:895
#2 0x55e0baaae1a4 in http_post() at plugins/out_http/http.c:352
#3 0x55e0baaaf4f7 in cb_http_flush() at plugins/out_http/http.c:641
#4 0x55e0bb016026 in co_init() at lib/monkey/deps/flb_libco/amd64.c:117
#5 0xffffffffffffffff in ???() at ???:0
- Steps to reproduce the problem:
Start fluentbit deamonset, just waiting.
Expected behavior
Screenshots
NAME READY STATUS RESTARTS AGE
fluent-bit-gq7ch 1/1 Running 1 (12h ago) 2d5h
fluent-bit-sdhrf 1/1 Running 0 2d5h
fluent-bit-sfm52 1/1 Running 0 29h
Your Environment
- Version used:4.0.3
- Configuration:
- Environment name and version (e.g. Kubernetes? What version?):
- Server type and version: kubernetes 1.32
- Operating System and version: x86
- Filters and plugins:
http plugin.
Additional context