请教heartbeat+drbd+mysql的一个问题

yoyoyuye

操作系统：centos 5.6 64bit
机器2台：MYSQLM1 和MYSQLM2
MYSQLM1 为primary
MYSQLM2 为secondary
2台机器etc/hosts的配置如下

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               MYSQLM2 localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
172.17.94.210   MYSQLM2                 node2 #MYSQLM1 此处修改下。
172.17.94.209  node1                    

heartbeat在2台机器的ha.cf配置如下：
debugfile /var/log/ha-debug
logfile /var/log/ha-log
logfacility local0
keepalive 2
deadtime 20
warntime 10
initdead 60
udpport 693
#ucast eht0 172.17.94.210
ping_group group1 172.17.94.209 172.17.94.210
auto_failback off
node MYSQLM1
node MYSQLM2
#respawn hacluster /usr/lib/heartbeat/ipfail
#apiauth ipfail gid=haclient uid=hacluster
hopfudge 1
haresources的配置文件如下：
2台机器的配置都一样。默认MYSQLM1为primary.虚拟IP为172.17.94.208,IP都设在eth0:0上。
MYSQLM1 drbddisk Filesystem::/dev/drbd0::/data::ext3 mysqld 172.17.94.208
heartbeat的resource.d目录下写的mysql如下：
#!/bin/bash
. /etc/ha.d/shellfuncs
case "$1" in
start)
   res='/etc/init.d/mysqld start'
   ret=$?
   ha_log $res
   exit $ret
   ;;
stop)
   res='/etc/init.d/mysqld stop'
   ret=$?
   ha_log $res
   exit $ret
   ;;
status)
   if [['ps -ef|grep '[m]ysqld''>1]];then
      echo "running"
   else
      echo "stopped"
   fi
   ;;
*)
   echo "Usage:mysqld {start|stop|status}"
   exit 1
   ;;
esac
exit 0

问题：
MYSQLM2的heartbeat日志:

heartbeat[2829]: 2011/08/31_10:57:26 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:28 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:30 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:32 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:34 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:34 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:36 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:38 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:40 CRIT: send_to_all_media: No working comm channels to write to.
heartbeat[2829]: 2011/08/31_10:57:42 CRIT: send_to_all_media: No working comm channels to write to.

1，为什么MYSQLM1我ifdown eth0之后，MYSQLM2的权限从secondary升级到primary需要重起机器才能获得权限？
希望路过有经验的能帮忙看看。
谢谢！

yoyoyuye

在MYSQLM1上执行ifdown eth0.查看MYSQLM2的heartbeat日志。提示如下：
Resource
Manager[3271]:  2011/09/01_09:23:36 info: Releasing resource group: mysqlm1 IPADDR::172.17.94.208/24/eth0:0 drbddisk::r0 Filesystem::/dev/drbd0::/data::ext3 mysqld
ResourceManager[3271]:  2011/09/01_09:23:36 info: Running /etc/ha.d/resource.d/mysqld  stop
ResourceManager[3271]:  2011/09/01_09:23:36 ERROR: Cannot locate resource script Filesystem
ResourceManager[3271]:  2011/09/01_09:23:36 ERROR: Cannot locate resource script Filesystem
ResourceManager[3271]:  2011/09/01_09:23:37 info: Retrying failed stop operation [Filesystem::/dev/drbd0::/data::ext3]
ResourceManager[3271]:  2011/09/01_09:23:37 ERROR: Cannot locate resource script Filesystem
ResourceManager[3271]:  2011/09/01_09:23:37 ERROR: Cannot locate resource script Filesystem
ResourceManager[3271]:  2011/09/01_09:23:38 info: Retrying failed stop operation [Filesystem::/dev/drbd0::/data::ext3]
ResourceManager[3271]:  2011/09/01_09:23:38 ERROR: Cannot locate resource script Filesystem
ResourceManager[3271]:  2011/09/01_09:23:38 ERROR: Cannot locate resource script Filesystem

1：为什么MYSQLM2没有获取primary权限，谢谢！