[syslog-ng] Syslog UDP extra packet?

Hello Syslog Experts, I have a question on the syslog-ng. I use syslog-ng 3.0.2. I tried to setup syslog-ng to forward syslog messages to other host. I tested 2 destination driver, udp() and syslog() as per below. test 1: udp("10.x.x.x" port(514)) test 2: syslog("10.x.x.x" transport("udp") port(514)); I found that with udp() driver, syslog-ng just forwards the incoming log messages to external host. No problem. However, with the syslog() driver, I found that syslog-ng generate 2 udp packets packet1... contains only 4 bytes in payload, I think this is message length?? packet2... is the actual syslog udp packet. Is it possible to disable the first packet? this just create the overhead unnecessarily? Please advise. Thanks. Cheers,