nginx的一个错误日志 就反复一个错误?报错

2013/07/01 14:21:46 [error] 5412#5340: *1 upstream timed out (10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond) while connecting to upstream, client: 192.168.1.107, server: localhost, request: "GET /xxx/newmsg HTTP/1.1", upstream: "http://127.0.0.1:18081/xxx/newmsg", host: "192.168.1.108", referrer: "http://192.168.1.108/xxx/"

log反复报这个-。-，但是tomcat访问项目没问题。。可是报错日志一直有增加