[syslog-ng] I/O errors

getting these errors at a rate of several per second but I can't figure out what is causing them: Jun 16 03:45:01 s_self@itslogprd01.its.auckland.ac.nz syslog-ng[31159]: I/O error occurred while reading; fd='758', error='Connection reset by peer (104)' Jun 16 03:45:01 s_self@itslogprd01.its.auckland.ac.nz syslog-ng[31159]: I/O error occurred while reading; fd='808', error='Connection reset by peer (104)' Jun 16 03:45:01 s_self@itslogprd01.its.auckland.ac.nz syslog-ng[31159]: I/O error occurred while reading; fd='906', we have one network destination which is a tcp connection and which appears to be fine. No errors on the other end and stats show now dropped packets. Russell