Fluentd Blog

Fluentd v1.13.3 has been released

Hi users!

We have released v1.13.3. ChangeLog is here.

This release is a maintenance release of v1.13 series. We recommend to upgrade Fluentd because it contains fixes about in_tail bugs.

in_tail: Fixed a bug that DeletePending state is not cared on Windows

In this release, Windows specific bug was fixed for in_tail plugin.

Windows has a concept of DeletePending, which means "DeleteFile() was called on that file. NTFS will remove this file once everyone close the handlers for it".

In the previous versions, it didn't care about it correctly, so there was a case that deleted file could not be handled properly.

in_tail: Fixed a bug that detecting rotation twice on follow_inode

In this release, the bug that duplicate events are emitted when follow_inode is true and rotation is occurred.

This bug was occurred when the following conditions are met:

• Wrong inode is set to TailWatcher when follow_inode is true
• A key (TargetInfo) in @tails isn't updated for a same path even if new one has different inode

We recommend to upgrade if you enable follow_inode.

in_tail: Fixed some position file related bugs

In this release, some bugs which are related to position file was fixed.

Here is the detail of fixed bugs:

• When both follow_inodes and pos_file_compaction_interval are specified, file entries that didn't exist on start up will be deleted unexpectedly when compaction is triggered
• String#bytesize should be used instead of String#size for path length, but it is not used

It causes a bug that file compaction does not work as expected.

Upgrade attention for TD Agent users

If you use Fluentd v1.12 or later, we recommend to use at least v1.12.4. It is because in_tail contains serious bugs in it.

Note that even latest td-agent 4.1.1 also ships a buggy Fluentd v1.12.3. You should upgrade bundled Fluentd by yourself. This issue will be fixed in the future release of td-agent.

$ sudo td-agent-gem install fluentd --version=1.13.3

Enjoy logging!