Multiline codec is not breaking messages correctly

Elastic Stack Logstash
1

Afternoon,

I'm having some issues with the multiline codec config and it adding events to the previous message so not being very helpful.

in logstash I have the following input definition

syslog {
        id => "input-syslog"
        port => 5140
        type => "syslog"
        codec => multiline {
            patterns_dir => [ "/etc/logstash/conf.d/patterns.d" ]
            pattern => "(^%{SYSLOGBASE})|(^%{SYSLOGBASE_RFC5424})|(Udp data)"
            negate => true
            what => "previous"
        }
        add_field => { "[logstash][host][name]" => "${LOGSTASH_HOSTNAME}" }
}

This seems to be working for some systems that throw a stack trace via syslog occasionally and where RFC5424 messages are sent (they always appear as a single event), but it doesn't appear to like the %{SYSLOGBASE} messages.

So I'm getting those types of messages rolled up

For example:

<134> 12/31/2019:15:01:32 GMT LB-TST-VPX01 0-PPE-0 : default EVENT MONITORUP 17181 0 : Monitor DBSMonServiceBinding_log-collectors-syslog:514_(tcp-default)(#syslog-internal_service-log-collectors-syslog
<134> 12/31/2019:15:01:40 GMT LB-TST-VPX01 0-PPE-0 : default GUI CMD_EXECUTED 17184 0 : User sparkblaze - Remote_ip 192.168.100.6 - Command "show ns config" - Status "Success"

Have I missed something obvious that I can't see at the moment?

2

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