I'm using Metricbeat 6.0 on Debian 9 (stretch) and I toggled redis.disabled in modules.d sub directory and adjusted hosts variable, followed by restarting metricbeat.service and now I'm seeing following error
root@app11:/etc/metricbeat/modules.d# tail -1 /var/log/metricbeat/metricbeat
2017-12-03T18:48:29Z ERR Unknown state <41> for process with pid 31139
root@app11:/etc/metricbeat/modules.d# ps -p 31139
PID TTY TIME CMD
31139 ? 00:00:00 (sd-pam)
root@app11:/etc/metricbeat/modules.d#
needless to say, I don't see anything in [Metricbeat Redis] Overview (Kibana)
Please advise.