Hi, I have a problem with nxlog. Try to start service nxlog with kafka configuration (including installation librdkafka) and unfortunately i have an error with starting nxlog: error: "Unit nxlog.service has begun starting up. Jan 03 17:24:12 Kafka4 nxlog[19220]: 2018-01-03 17:24:12 ERROR Failed to load module from /opt/nxsec/libexec/nxlog/modules/output/om_kafka.so, /opt/nxsec/libexec/nxlog/modules/output/om_kafka.so: undefined symbol: rd_kafka_last_error;DSO load failed Jan 03 17:24:12 Kafka4 systemd[1]: nxlog.service: control process exited, code=exited status=1 Jan 03 17:24:12 Kafka4 systemd[1]: Failed to start NXLog daemon. -- Subject: Unit nxlog.service has failed -- Defined-By: systemd"

I am using om_tcp for forwarding Windows logs to a SIEM system. What will be the expected behavior of nxlog if e.g. a firewall blocks the TCP connections from the nxlog agent to the SIEM? Is there any potential danger in nxlog buffering outgoing logs so that large amounts of memory or disk space would be consumed on the sending host while the connections get blocked?