Fluentd Blog

fluent-package v5.0.5 has been released

Hi users!

We have released fluent-package v5.0.5. fluent-package is a stable distribution package of Fluentd. (successor of td-agent v4)

This is a maintenance release of v5.0.x LTS series. As bundled Ruby was updated to 3.2.6 and Fluentd was updated to 1.16.6. We recommend upgrading to fluent-package v5.0.5!

Changes from fluent-package v5.0.4

In this release, focused on updating bundled ones.

• Update ruby to 3.2.6
• Update fluentd to 1.16.6
• Update bundled gems overall
• Solved possibility of DoS through "NoMemoryError"
• msi: set GEM_HOME/GEM_PATH in fluentd.bat
• Fixed SIGABORT error with fluent-plugin-systemd

Solved possibility of DoS through "NoMemoryError"

In the previous versions of msgpack gem, there was a possibility that cause DoS (Denial Of Service) when crafted message was sent to Fluentd.

When that message was sent, it might cause "NoMemoryError" on Fluentd because there is a case that msgpack try to pre-allocate huge amount of memories.

Above behavior was fixed not to pre-allocate over 32k entries (limit pre-allocated amount of memories) in msgpack 1.7.3 and bundled into fluent-package v5.0.5.

msi: set GEM_HOME/GEM_PATH in fluentd.bat

In the previous versions, fluentd.bat doesn't set GEMHOME/GEMPATH explicitly.

If users set custom GEM_HOME / GEM_PATH environment variables, the batch file will not work as expected. Therefore, this patch will set the appropriate values in the batch file.

Above bug was also fixed in fluent-package v5.0.5.

Fixed SIGABORT error with fluent-plugin-systemd

In this release, the bundled fluent-plugin-systemd was updated to 1.1.0. That release fixed SIGABORT error with inconsistency of memory allocator handling.

Download

Please see the download page.

About next LTS schedule

We plan to ship the next LTS version of fluent-package v5.0.6 on March, 2025. The content of updates are still in T.B.D.

End of support for td-agent v4, let's migrate to fluent-package

As it was already announced Drop schedule announcement about EOL of Treasure Agent (td-agent) 4, td-agent v4 was reached EOL in Dec, 2023.

After reached EOL, td-agent v4.5.3 on Windows was released because there was a crash bug during startup on Windows. It was backported fix from fluent-package v5 as it is critical in some case. Even though this was a exceptional maintenance release, but there is no change to the fact that we already stopped maintaining td-agent v4.

We strongly recommend migrating from td-agent v4 to fluent-package v5 (LTS). See Upgrade to fluent-package v5