metrics-reporter-csv-3.0.1-SNAPSHOT.jar Configuration Issue

[Gagan Preet Singh]

Compiled via Maven and got the Jar
metrics-reporter-csv-3.0.1-SNAPSHOT.jar

even added the configuration in /etc/graylog/server/server.conf

metrics_csv_enabled = true
metrics_csv_report_interval = 15s
metrics_csv_directory = /tmp/graymetrics/
metrics_csv_locale =
metrics_csv_unit_rates = seconds
metrics_csv_unit_durations = milliseconds
metrics_csv_include_metrics = .*

I restarted the graylog-server but ends up with graylog-server.service failed.

Thanks.