#2013 - Lost connection to MySQL server at 'reading initial communication packet', system error: 104

[aclhkaclhk aclhkaclhk]

mysql-proxy 0.8.0
mysql server 5.0.77 (master and slave)

./mysql-proxy --proxy-backend-addresses=192.168.123.1:3306 --proxy-read-only-backend-addresses=192.168.123.2:3306 --proxy-lua-script=/root/mysqlproxy/share/doc/mysql-proxy/rw-splitting.lua

010-09-03 14:57:09: (debug) abs wait-for-event::done usec= 0
2010-09-03 14:57:09: (debug) abs lua-exec::done usec= 0
2010-09-03 14:57:09: (debug) [network-mysqld.c:817]: error on a connection (fd: -1 event: 0). closing client connection.
2010-09-03 14:57:09: (debug) chassis.c:201: 30517 returned: 30517
2010-09-03 14:57:09: (message) chassis.c:223: [angel] PID=30517 died on signal=11 (it used 0 kBytes max) ... waiting 3min before restart

only happens after 5 times of mysql queries.