Logstash 7.9 high CPU, RAM and hangs when a unicode message is received by syslog input

Hi All, any assistance on this issue would be most appreciated.

On receiving the following message, logstash stopped processing any further incoming messages and began consuming high CPU.

  • Version: 7.9.0
  • Operating System: RHEL 7
  • Config File:
    input {
    syslog {
    codec => cef
    port => 514
  • Sample Data:
    [WARN] 21-04-09 20:39:33 [Ruby-0-Thread-136: :1] plain - Received an event that has a different character encoding than you configured. {:text=>",<12>Apr 0:39:48 hostname \xB0\u0014[17693]: remainder of message redacted", :expected_charset=>"UTF-8"

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