Re: Logstash and Multiline Log Entry

Simon Johansson <simon@...>

This is a tricky one. Especially if you have more than one logstash machine
doing filtering as they will do filtering independently of each other as
the events come in.

The reason why CF adds a timestamp to each line is because how syslog
works, where each line is its own even.

What we tend to do in my company is to log this kind of stuff via GELF or
with Sentry.

On Mon, Jul 27, 2015 at 5:41 PM, Steve Wall <stevewallone(a)> wrote:

We are sending CF logs message to an ELK stack. Multiline logs message are
broken out into several log messages in Logstash. One end per line of the
multiline log message. This is problematic when stack traces dumped to the
log. Each line of the stack trace is translated into a log message. Trying
to view this through Kibana is nearly impossible. Logstash provides a Grok
feature allowing for the manipulation of the log messages. One common
solution is to create a Grok filter that using a timestamp to indicate when
a log entry starts and to combine all lines until the next timestamp into
one log message. The problem is that CF adds a timestamp to every line. Has
anyone come up with a good Grok expression to handle multiline log message
coming out of CF?

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