Hi users!
We had launched fluent-package v6 series last year, recently shipped v6.0.4 in LTS release channel.
In this blog article, we explains the planned next major updates - v7.0.0.
In short, we will ship fluent-package v7 in Aug, 2027.
We keeps two release channels as follows:
Here is the difference of these channels.
fluent-package v8.0.0, and will be shipped in 2029 (T.B.D.).As for fluent-package v7,
Current releases and future plans:
| Release Version | Release Date | End of life |
|---|---|---|
| v6.0.x (LTS) | Aug, 2025 | Dec, 2027 |
| v7.0.0 (LTS) | Aug, 2027 | Dec, 2029 (T.B.D.) |
| v8.0.0 (LTS) | Aug, 2029 (T.B.D.) | T.B.D. |
Happy logging!
Hi users!
We have released fluent-package v6.0.3 on 2026-03-27. Fluent Package is a stable distribution package of Fluentd. (successor of td-agent)
This is a maintenance release of v6.0.x LTS series.
Fluent Package v6.0.3 includes the following improvements:
cool.io v1.9.3 under specific conditionsThis article explains the changes in Fluent Package v6.0.3.
In fluent-package v6.0.2, a critical issue was discovered where memory usage continuously increases over time. This release completely resolves this problem.
out_forward plugin with the keepalive false setting (which is the default value).cool.io (v1.9.2 and v1.9.3) bundled in fluent-package v6.0.2 had a bug in its detachment process.cool.io v1.9.4 which fixes this bug, and it is now bundled by default in fluent-package v6.0.3. If operated for a long period, this memory leak will exhaust system memory resources, eventually causing the Fluentd process to be terminated unexpectedly by the OOM (Out of Memory) Killer. We strongly recommend users who are using out_forward on v6.0.2 to update to this version immediately.
Note: Users on fluent-package v6.0.1 or earlier are not affected by this specific issue.
Ruby 3.4.9 includes multiple bug and security fixes. Specifically, it addresses the following vulnerability:
For details, please see the Ruby 3.4.9 release notes.
We have updated the bundled Nokogiri from v1.18.10 to v1.19.2 for the Windows version to address the following vulnerability:
Please visit the download page.
We plan to release the next LTS version of fluent-package v6.0.4 at June 2026. The content of updates are still TBD.
We have been posting information about Fluentd in Japanese on @fluentd_jp. We would appreciate it if you followed the X account.
Hi users!
We have released fluent-package v6.0.2 on 2026-02-27. Fluent Package is a stable distribution package of Fluentd. (successor of td-agent)
This is a maintenance release of v6.0.x LTS series.
Fluent Package v6.0.2 includes the following improvements:
This article explains the changes in Fluent Package v6.0.2.
Ruby 3.4.8 includes multiple bug and security fixes. For details, please see the Ruby 3.4.8 release notes.
Fluentd v1.19.2 includes the following fixes:
config_include_dirFor details, please see the Fluentd v1.19.2 has been released.
In this release, it was fixed update error if temporary working directory was removed.
In the previous versions, if temporary working directory was removed by tmpfiles.d, there was a case that updating to v6 (up to v6.0.1) causes fatal error while rpm processes transaction.
Now, with changing temporary working directory handling, it was fixed in v6.0.2.
Since v6.0.0, installation maintenance script (powershell) was partially introduced for Windows. But in some environments, there is a case that the execution of powershell was prohibited in your policy. In such a case, installation process will be failed unexpectedly.
In this release, added fallback not to terminate installation process accidentally.
Please visit the download page.
We plan to release the next LTS version of fluent-package v6.0.3 at June 2026. The content of updates are still TBD.
We have been posting information about Fluentd in Japanese on @fluentd_jp. We would appreciate it if you followed the X account.
Hi users!
We have released v1.19.2 on 2026-02-13. ChangeLog is here.
This release is a maintenance release of v1.19 series.
This release will be bundled for upcoming fluent-package LTS version v6.0.2!
config_include_dirSince Fluentd v1.19.0, the configuration files under/etc/fluent/conf.d were
changed to load automatically.
This feature was introduced to load builtin plugins and designed to work well with fluent-package.
But, as a side effect, there is a case that duplicated configuration files are
loaded if user already configured to include from /etc/fluent/conf.d.
In that case, it causes startup failures. Thus, user need to disable with config_include_dir "" explicitly as a workaround.
In this release, not to raise startup failure, we fixed duplicate configured file loading in config_include_dir.
in_tail: fixed error when files without read permission are included in glob patternsIn the previous versions, if you enabled Linux capability feature with Fluentd, there is a case that it causes an error.
It was caused when accessing uninitialized instance variable.
out_forward: added timeout to prevent infinite loop under unstable network connectionIn unstable network environments with proxy components, if connection drops during handshake after TLS establishment, Fluentd gets stuck in infinite loop causing logs to stop being flushed.
In this release, fixed to uses existing hard_timeout configuration to break the loop,
then disable problematic nodes, and maintain log flow through healthy nodes.
This fixes improves stability of Fluentd.
net-http gem had a bug in handling IPv6 addresses, and updating the uri gem
would trigger strict checking, thus causing errors.
It was affected when you installed via gem command.
There is a case that unintentionally backed-up conf file will be loaded by wild card @include.
It will help to detect such a careless mistakes by warning.
For example, if you include configuration file by @include conf/*.conf, and there are
unintentionally backed-up file exists (conf/dummy.bak.conf), usually it causes startup failures.
In this release, it detects such a case as a warning.
$ fluentd -c wildcard_include.conf --dry-run
2026-02-12 17:41:39 +0900 [info]: init supervisor logger path=nil rotate_age=nil rotate_size=nil
2026-02-12 17:41:39 +0900 [warn]: There is a possibility that '@include conf/*.conf' includes duplicated backed-up config file such as <dummy.bak.conf>
2026-02-12 17:41:39 +0900 [info]: parsing config file is succeeded path="wildcard_include.conf"
2026-02-12 17:41:39 +0900 [info]: configuration include directory is disabled
2026-02-12 17:41:39 +0900 [info]: gem 'fluentd' version '1.19.0'
2026-02-12 17:41:39 +0900 [info]: starting fluentd-1.19.0 as dry run mode ruby="3.4.8"
2026-02-12 17:41:39 +0900 [info]: using configuration file: <ROOT>
<system>
config_include_dir ""
</system>
<source>
@type forward
</source>
<source>
@type forward
</source>
</ROOT>
2026-02-12 17:41:39 +0900 [info]: finished dry run mode
Enjoy logging!
We have been posting information about Fluentd in Japanese on @fluentd_jp. We would appreciate it if you followed the X account.
Hi users and developers!
As already planned before, we announce the dropping schedule for Fluent Package 5 (LTS) development.
Since fluent-package 5.0.0 was released in 2023, fluent-package 5 has been maintained for a long time.
As new major version of fluent-package 6 was released in August 2025, we decided to stop maintaining fluent-package 5 in Dec 31, 2025.
LTS version of fluent-package v6 will be planned support until Dec, 2027. It will meet for your enterprise services.
As you know, already stepping down maintenance activity, new minor update for fluent-package 5 will not be shipped anymore. fluent-package v5.0.9 should be the last release of this series, it was shipped in Dec 19, 2025.
Thus, we recommend using fluent-package v6 for new deployment :)
There is a good article to do it.
Follow the above instructions.
We have been posting information about Fluentd in Japanese on @fluentd_jp. We would appreciate it if you followed the X account.
Fluentd is an open source data collector to simplify log management.
2026-08-29: Scheduled support lifecycle announcement about Fluent Package v7
2025-12-25: Drop schedule announcement about EOL of Fluent Package (fluent-package) 5
2025-09-04: Upgrade Guide for fluent-package v6
2024-08-29: Scheduled support lifecycle announcement about Fluent Package v6
2023-08-29: Drop schedule announcement about EOL of Treasure Agent (td-agent) 4
2023-08-29: Scheduled support lifecycle announcement about Fluent Package
2023-07-31: Upgrade to fluent-package v5
2026-08-29: Scheduled support lifecycle announcement about Fluent Package v7
2026-03-27: fluent-package v6.0.3 has been released
2026-02-27: fluent-package v6.0.2 has been released
2026-02-13: Fluentd v1.19.2 has been released
2025-12-25: Drop schedule announcement about EOL of Fluent Package (fluent-package) 5
2025-12-19: fluent-package v5.0.9 has been released
2025-12-09: Fluentd v1.16.11 has been released
2025-11-11: fluent-package v6.0.1 has been released
2025-11-06: Fluentd v1.19.1 has been released
2025-10-08: fluent-package v5.0.8 has been released
Want to learn the basics of Fluentd? Check out these pages.
Couldn't find enough information? Let's ask the community!
You need commercial-grade support from Fluentd committers and experts?
©2010-2026 Fluentd Project. ALL Rights Reserved.
Fluentd is a hosted project under the Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.
The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see our Trademark Usage page.