flume 1.6 with logrotate lose data

[龙海天]

Hello,
      I use flume 1.6 execsource with command : tail -F /opt/log/web.log,
but the log execute logrotate  periodicity ,the logrotate conf is
copy-truncate. Then flume  always get data lost about 1 second every time
logrotate is executed. How can I do?
Here is logrotate conf:
/opt/log/web.log {
   nocompress
   daily
   copytruncate
   create
   ifempty
   noolddir
   rotate 3
}


Vincent Shao