操作系统： Red Hat Enterprise Linux AS release 4 (Nahant Update 3)
zookeeper 3.4.5
jdk 1.6.0_27
三个机器，zookeeper zoo.cfg已经配置好
tickTime=2000
dataDir=/var/zookeeper/
clientPort=2180
initLimit=5
syncLimit=2
server.0=ip1:2888:3888
server.1=ip2:2888:3888
server.2=ip3:2888:3888
启动后，显示STARTED，zookeeper.out中只有如下信息：
2013-12-13 01:10:02,439 [myid:] - INFO [main:QuorumPeerConfig@101] - Reading configuration from: /usr/zookeeper/bin/../conf/zoo.cfg
2013-12-13 01:10:02,446 [myid:] - INFO [main:QuorumPeerConfig@334] - Defaulting to majority quorums
2013-12-13 01:10:02,451 [myid:0] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2013-12-13 01:10:02,451 [myid:0] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2013-12-13 01:10:02,451 [myid:0] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2013-12-13 01:10:02,465 [myid:0] - INFO [main:QuorumPeerMain@127] - Starting quorum peer
server.pid也在，但是进程不在，这个是咋回事儿？哪位大牛能帮忙解决一下
