Does Logstash has a limit size for each event-message?

Question

I am implementing a monitoring tool on servers of my company service. To do that, I am using logstash. Our applications send their logs via a log4net udp appender to logstas

Answer 1

Update for 2019:

The maximum size is set by the buffer_size parameter in the UDP input. https://www.elastic.co/guide/en/logstash/current/plugins-inputs-udp.html#plugins-inputs-udp-buffer_size

The default buffer size is:

• 65536 bytes on Logstash >= 5.1
• 8192 bytes on Logstash >= 2.0
• 4096 bytes on older versions.

A UDP datagram is limited to 65535 bytes, the length header being 16 bits.