squid启动失败

[root@ann root]# /usr/local/squid/bin/squid start
FATAL: getgrnam failed to find groupid for effective group 'nogroup'
Squid Cache (Version 2.4.STABLE3): Terminated abnormally.
CPU Usage: 0.008 seconds = 0.006 user + 0.002 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 258
Aborted