Fluentd Blog

fluent-package v5.0.4 has been released

Hi users!

We have released fluent-package v5.0.4. 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 3.2.4 and a foolproof mechanism was implemented to prevent launching duplicated Fluentd instances, we recommend upgrading to fluent-package v5.0.4!

Changes from fluent-package v5.0.3

• Update ruby to 3.2.4 (#645)
• Fixed to prevent launching Fluentd wrongly if the service is already running (#648,#649)
• Added support for Ubuntu 24.04 (Noble Numbat)

Fixed to prevent launching Fluentd wrongly if the service is already running

In this release, a foolproof mechanism was implemented to prevent launching Fluentd wrongly if the service is already running.

As you know, you can check the version of Fluentd with fluentd --version, but there is a case that fluentd -v is executed wrongly to do it.

When already running Fluentd as a service, fluentd -v launches a duplicated Fluentd instance with the same fluentd configuration. If you launch duplicated Fluentd instances, it causes the corruption of processing Fluentd buffer. To prevent such a situation, a foolproof was implemented now.

For example, if Fluentd is running as a service, launching Fluentd causes an error to block it.

Here is the example on Windows:

> fluentd
Error: Can't start duplicate Fluentd instance with the default config.

To start Fluentd, please do one of the following:
  (Caution: Please be careful not to start multiple instances with the same config.)
  - Stop the Fluentd Windows service 'fluentdwinsvc'.
  - Specify the config path explicitly by '-c' ('--config').

Even though if you wrongly launch Fluentd to check version with -v (It should be --version to show version), then it causes the following error.

> fluentd -v
Error: Can't start duplicate Fluentd instance with the default config.

To take the version, please use '--version', not '-v' ('--verbose').

To start Fluentd, please do one of the following:
  (Caution: Please be careful not to start multiple instances with the same config.)
  - Stop the Fluentd Windows service 'fluentdwinsvc'.
  - Specify the config path explicitly by '-c' ('--config')

Note that this foolproof feature is intended to block launching duplicated Fluentd instance, you can explicitly launch Fluentd by specifying a specific option to pass it even though already Fluentd is running as a service.

On Windows:

• -c (--config)
• --dry-run
• --reg-winsvc
• --reg-winsvc-fluentdopt
• --show-plugin-config

On Linux:

• -c (--config)
• --dry-run
• --show-plugin-config

Download

Please see the download page.

Announcement

About next LTS schedule

We plan to ship the next LTS version of fluent-package v5.0.5 on Oct, 2024. 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