为什么如果数据库导入data.sql，则zabbix_proxy服务无法启动？

zabbix_proxy的main()函数如下

int	main(int argc, char **argv)
{
	zbx_task_t	task = ZBX_TASK_START;
	char		ch;

#if defined(PS_OVERWRITE_ARGV) || defined(PS_PSTAT_ARGV)
	argv = setproctitle_save_env(argc, argv);
#endif
	progname = get_program_name(argv[0]);

	/* parse the command-line */
	while ((char)EOF != (ch = (char)zbx_getopt_long(argc, argv, shortopts, longopts, NULL)))
	{
		switch (ch)
		{
			case 'c':
				CONFIG_FILE = zbx_strdup(CONFIG_FILE, zbx_optarg);
				break;
			case 'R':
				if (0 == strcmp(zbx_optarg, ZBX_CONFIG_CACHE_RELOAD))
					task = ZBX_TASK_CONFIG_CACHE_RELOAD;
				else
				{
					printf("invalid runtime control option: %s\n", zbx_optarg);
					exit(EXIT_FAILURE);
				}
				break;
			case 'h':
				help();
				exit(-1);
				break;
			case 'V':
				version();
				exit(-1);
				break;
			default:
				usage();
				exit(-1);
				break;
		}
	}

	if (NULL == CONFIG_FILE)
		CONFIG_FILE = zbx_strdup(CONFIG_FILE, SYSCONFDIR "/zabbix_proxy.conf");

	/* required for simple checks */
	init_metrics();

	zbx_load_config();

	if (ZBX_TASK_CONFIG_CACHE_RELOAD == task)
		exit(SUCCEED == zbx_sigusr_send(ZBX_TASK_CONFIG_CACHE_RELOAD) ? EXIT_SUCCESS : EXIT_FAILURE);

#ifdef HAVE_OPENIPMI
	init_ipmi_handler();
#endif

	return daemon_start(CONFIG_ALLOW_ROOT);
}