Unknown filter plugin 'concat' [fluentd1.3.3 concat2.5.0]

[AkitoZz]

Problem

[error]: config error file="/etc/fluent/fluent.conf" error_class=Fluent::ConfigError error="Unknown filter plugin 'concat'. Run 'gem search -rd fluent-plugin' to find plugins"

Steps to replicate

here is my part config:

<filter kubernetes.**>
@type concat
key log
multiline_end_regexp /\n$/
separator ""

If I comment out this configuration, fluentd words fine, why fluentd can't find this plugin, while other plugins work fine

Expected Behavior

Your environment

• docker linux x86_64 3.10.0-967.27.2.el7.x86_64
• fluentd 1.3.3
• fluent-plugin-concat 2.5.0

[ziaurrehman72]

Getting the same error. Is there any update ??

[ashie]

Please describe the detail how did you install Fluentd & fluent-plugin-concat.

[plakhp]

Getting the same error. docker install。
FROM fluent/fluentd:v1.17-debian
USER root
RUN gem sources --remove https://rubygems.org/ &&
gem sources -a https://mirrors.aliyun.com/rubygems/ &&
gem sources -l &&
gem install elasticsearch --no-document --version 7.17.8 &&
gem install fluent-plugin-elasticsearch --no-document --version 5.3.0 &&
gem install fluent-plugin-kafka &&
gem install fluent-plugin-concat &&
gem install fluent-plugin-detect-exceptions &&
gem install fluent-plugin-prometheus
USER fluent

run error message:

2024-08-22 08:49:21 +0000 [info]: parsing config file is succeeded path="/fluentd/etc/fluent.conf"
2024-08-22 08:49:21 +0000 [info]: gem 'fluentd' version '1.17.0'
2024-08-22 08:49:21 +0000 [info]: gem 'fluent-plugin-concat' version '2.5.0'
2024-08-22 08:49:21 +0000 [info]: gem 'fluent-plugin-detect-exceptions' version '0.0.15'
2024-08-22 08:49:21 +0000 [info]: gem 'fluent-plugin-elasticsearch' version '5.3.0'
2024-08-22 08:49:21 +0000 [info]: gem 'fluent-plugin-kafka' version '0.19.3'
2024-08-22 08:49:21 +0000 [info]: gem 'fluent-plugin-prometheus' version '2.2.0'
2024-08-22 08:49:21 +0000 [error]: config error file="/fluentd/etc/fluent.conf" error_class=Fluent::NotFoundPluginError error="Unknown parser plugin 'concat'. Run 'gem search -rd fluent-plugin' to find plugins"

[maximouse-lab]

same issue