加载模块mod_proxy_cluster.so时httpd.conf，在 AIX 7.2 powerpc v1.3.0 上出现以下错误））
httpd: Syntax error on line 555 of /opt/freeware/etc/httpd/conf/httpd.conf:
Cannot load /opt/freeware/lib/httpd/modules/mod_proxy_cluster.so into server:
rtld: 0712-001 Symbol proxy_hook_canon_handler was referenced from module
/opt/freeware/lib/httpd/module/mod_proxy_cluster.so(), but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol proxy_hook_pre_request was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol proxy_hook_post_request was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol ap_proxy_hashfunc was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol ap_proxy_get_balancer was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol ap_proxyerror was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
rtld: 0712-001 Symbol ap_proxy_canon_netloc was referenced from module
/opt/freeware/lib/httpd/modules/mod_proxy_cluster.so(),
but a runtime definition of the symbol was not found.
Additional errors occurred but are not reported