我在Google App Engine上有一個Java應用程序,它帶有一個從Google雲端存儲中加載大圖像的servlet。這段代碼確實有效(比如......昨天),而且由於某種原因它已經不復存在了,但我沒有編輯它!雖然幾次刷新,但它曾經返回大約一半的應該加載的圖像,然後停止。Google App Engine/Java:blobstore.serve返回500服務器錯誤
這裏是servlet:
@SuppressWarnings("serial")
public class SomeServlet extends HttpServlet
{
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException
{
BlobstoreService blobstore = BlobstoreServiceFactory.getBlobstoreService();
String file = req.getParameter("file");
String folder = req.getParameter("folder");
BlobKey blobkey = blobstore.createGsBlobKey("/gs/bucket/" + folder + "/" + file + ".jpg");
blobstore.serve(blobkey, resp);
}
}
這裏是日誌說什麼,沒有任何警告/錯誤/關鍵標誌:
2012-07-26 19:44:54.635 /servlet?folder=SomeFolder&file=SomeFile 200 96ms 0kb Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1 [26/Jul/2012:10:44:54 -0700] "GET /servlet?folder=SomeFolder&file=SomeFile HTTP/1.1" 200 334 - "Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1" "myapp.appspot.com" ms=97 cpu_ms=103 api_cpu_ms=33 cpm_usd=0.002957 instance=00c61b117cef9993f79be3c568c0cbda0f14
這裏是http://myapp.appspot.com/servlet?folder=SomeFolder&file=SomeFile顯示:
Error: Server Error The server encountered an error and could not complete your request. If the problem persists, please report your problem and mention this error message and the query that caused it.
任何想法?
謝謝!
我無法追蹤任何東西。順便說一下,在嘗試時,servlet在數十次調用中確實有兩次隨機工作,並且它也返回了一半圖像。我沒有看到原因! – user1394563 2012-07-26 22:20:51