Ruby 1.8.7、rails 3.0.1 アプリケーションは 1 年以上正常に動作しており、1 週間更新されていません。ただし、突然アプリにアクセスすると、503 エラーが返されます。データベース接続は別の Linode にあります - 問題なく動作しており、問題のサーバーから mysql db に手動で接続できます。nginx のアクセス ログには次のように記録されています。
2012/06/30 03:20:00 [error] 2277#0: *509 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:20:12 [error] 2277#0: *511 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:20:24 [error] 2277#0: *513 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:20:36 [error] 2277#0: *515 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:20:48 [error] 2277#0: *517 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:21:00 [error] 2277#0: *519 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:21:12 [error] 2277#0: *521 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:21:24 [error] 2277#0: *523 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
2012/06/30 03:21:35 [error] 2277#0: *525 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET / HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*"
Linode は、最終的にはすべてが順調に進んでいると言っています - 正しい方向に私を向けることができるアイデアはありますか?