I just downloaded the new logstash version (5.2.1), and after starting it I noticed a warning message saying that log4j needs to be initialized properly. I also noticed that plugins like kafka, beats, etc, were not emitting any output log... I used this very simple command to reproduce the problem…

Fresh logstash 5.2 install gives log4j warnings and no logging from plugins

Carlos_Alexandre (Carlos Alexandre) February 22, 2017, 12:54pm 5

Any news on this?

I was hoping to hear from the logstash team...

Error regarding log4j: well worn topic

Topic		Replies	Views
Log files not forwarded to Elasticsearch Logstash	3	1211	March 18, 2017
Error regarding log4j: well worn topic Logstash	2	1632	July 12, 2017
WARN No appenders could be found for logger (org.apache.kafka.clients.consumer.ConsumerConfig) Logstash	1	3257	March 28, 2017
log4j:WARN No appenders could be found for logger (org.apache.kafka.clients.consumer.ConsumerConfig). log4j:WARN Please initialize the log4j system properly Logstash	1	1170	June 2, 2019
Error start Logstash 5 Logstash	4	7130	July 6, 2017