504 Gateway Time-out

[error] 25132#0: *781914 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 77.120.xxx.xxx, server: site.com, request: «GET /search/topics/?q=%D0%B2%D0%B2 HTTP/1.1», upstream: «77.120.xxx.xxx:8080/search/topics/?q=%D0%B2%D0%B2», host: «site.com», referrer: «site.com/search/»