私の pdf はローカルで、時には Heroku アプリで正しく生成されますが、時折タイムアウトし、このエラーが表示されます
2012-05-04T14:53:33+00:00 app[web.1]: Started GET "/orders/125/invoice_pdf.pdf" for 10.87.41.73 at 2012-05-04 14:53:33 +0000
2012-05-04T14:54:03+00:00 heroku[router]: Error H12 (Request timeout) -> GET www.printavo.com/orders/125/invoice_pdf.pdf dyno=web.1 queue= wait= service=30000ms status=503 bytes=0
2012-05-04T14:54:03+00:00 heroku[nginx]: 10.87.41.73 - backerm2 [04/May/2012:14:54:03 +0000] "GET /orders/125/invoice_pdf.pdf HTTP/1.1" 503 607 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19" www.printavo.com
2012-05-04T14:54:03+00:00 heroku[nginx]: 127.0.0.1 - backerm2 [04/May/2012:14:54:03 +0000] "GET /orders/125/invoice_pdf.pdf HTTP/1.0" 503 607 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19" www.printavo.com
2012-05-04T14:54:05+00:00 heroku[router]: Error H12 (Request timeout) -> GET www.printavo.com/customers/new dyno=web.1 queue= wait= service=30000ms status=503 bytes=0
何が問題なのですか?