[Q&A] Trying to Configure syslog as input plugin with port 5140. Facing the issue as unexpected error error_class=Errno::EADDRINUSE error="Address already in use - bind(2) for 0.0.0.0 :5140"

[SudhaPrajapati]

What is a problem?

Trying to Configure syslog as input plugin with port 5140.
Facing the issue as unexpected error error_class=Errno::EADDRINUSE error="Address already in use - bind(2) for 0.0.0.0 :5140".

Below is the configuration which i have used for source
_
@type syslog
port 5140
bind 0.0.0.0


tag syslog.customlog

Describe the configuration of Fluentd

@type syslog port 5140 bind 0.0.0.0 tag syslog.customlog @type file path /var/log/fluent/Test.log append true @type file path /var/log/fluent/buffer/lg1 chunk_limit_size 16m queue_limit_length 1024 flush_interval 5s retry_max_interval 30 overflow_action block

Describe the logs of Fluentd

117:in send_socket' 2025-11-13 13:36:20 +0000 [error]: #0 /opt/fluent/lib/ruby/gems/3.2.0/gems/serverengine-2.3.2/lib/serverengine/socket_manager.rb:164:i n process_peer'
2025-11-13 13:36:20 +0000 [error]: #0 unexpected error error_class=Errno::EADDRINUSE error="Address already in use - bind(2) for 0.0.0.0
:5140"

Environment

- Fluentd version: fluent-package 5.0.8 fluentd 1.16.10 (5114da659c360c3d7afdd2940ac129f7ffd00214)
- TD Agent version:
- Fluent Package version: 5.0.8
- Docker image (tag):
- Operating system: Linux Ubuntu 24.04.3 LTS (GNU/Linux 6.14.0-1014-azure x86_64)
- Kernel version: