Fluentd Blog

Fluentd v1.12.3 has been released

Hi users!

We have released v1.12.3. ChangeLog is here.

TLSServer: Enable TCP keep-alive support for TLS connections

TLS implementation was updated to allow the use of send_keepalive_packet. This feature can be used to detect dropped TLS connections, and to prevent them from consuming too much system resource.

<source>
  @type forward
  send_keepalive_packet true
  <transport tls>
    cert_path /path/to/fluentd.crt
    ...
  </transport>
</source>

TLSServer: Show peer information on connection errors

Starting from this version, Fluentd will includes the client information when it fails to establish a secure connection, to ease the diagnosis of TLS-related problems (such as invalid client certs).

2021-04-23 17:35:03 +0900 [warn]: #0 unexpected error before accepting TLS connection by OpenSSL host="127.0.0.1" port=34634 error_class=OpenSSL::SSL::SSLError error="SSL_accept returned=1 errno=0 state=error: tlsv1 alert unknown ca

in_tail: Fix IO error handling on Windows system

Previously, in_tail had a bug that reports a bogus IO error code on the Windows platform (e.g. reports ERROR_SHARING_VIOLATION on missing files).

Starting from this version, in_tail will retrieve Windows error codes correctly, and show much more descriptive messages for them.

Fluent::Win32Error: code: 32, The process cannot access the file because it is being used by another process. - C:\file.txt",

in_tail: Handle short-lived log files correctly

Fluentd v1.12.2 had a race-condition bug that throws an uncatched exception on short-lived files #3327. This version contains a fix for the issue.

Miscellaneous bug fixes

• Fix parser_type symbol conflicts in parser_csv and parser_syslog. #3302
• Fix position file corruption issue on concurrent gracefulReloads #3335
• Fix incorrect warnings about ${chunk_id} with out_s3 #3339

Enjoy logging!