I am exploring on Elastic 5.0 alpha. I installed all the components(ELKB) on same machine. I have used the same configuration as I did on working stack of ELKB in its previous version. The problem is that, logstash stops working after few seconds. I did configtest, it is fine. On checking logstash.err log file, it gives only one message "ERROR: too many arguments"
Exactly how are you invoking Logstash?
Fixed here: https://github.com/elastic/logstash/pull/5083