当重新安装上载的文件服务器超时 [英] Server timeout when re-assembling the uploaded file
问题描述
我运行一个简单的服务器应用程序，从细上传的Web客户端接收上传。它是基于精细上传的Java例子，是的tomcat6与Apache坐在它的面前，用的ProxyPass请求路由运行。我遇到了一个偶然的问题，在上传到达100％，但最终失败。在服务器日志，以及在客户端上，我可以看到Apache正在超时在代理一个502错误。
I am running a simple server app to receive uploads from a fine-uploader web client. It is based on the fine-uploader Java example and is running in Tomcat6 with Apache sitting in front of it and using ProxyPass to route the requests. I am running into an occasional problem where the upload gets to 100% but ultimately fails. In the server logs, as well as on the client, I can see that Apache is timing out on the proxy with a 502 error.
努力，看到这个自己之后，我意识到有真正的大文件时出现问题。 Java服务器应用程序是服用时间超过30秒钟，将块重新组合成一个单一的文件，因此阿帕奇会杀死连接，并停止等待。我增加了Apache的超时为300秒，这在很大程度上要解决该问题，但潜在的遗体。
After trying and seeing this myself, I realized the problem occurs with really large files. The Java server app was taking longer than 30 seconds to reassemble the chunks into a single file and so Apache would kill the connection and stop waiting. I have increased Apache Timeout to 300 seconds which should largely correct the problem but the potential remains.
这是其他方式来处理这个问题，这样虽然app组装服务器上的数据块Apache和Tomcat之间的连接没有被杀死任何想法？我目前使用2 MB块，并想也许我应该使用较大的块大小。或许用更少的块来组装服务器code可以做得更快。我可以测试，但除非加速比是戏剧性的，好像对问题仍然存在，只是在等待一个足够大的上传一起去触发他们的潜力。
Any ideas on other ways to handle this so that the connection between Apache and Tomcat is not killed while the app is assembling the chunks on the server? I am currently using 2 MB chunks and was thinking maybe I should use a larger chunk size. Perhaps with fewer chunks to assemble the server code could do it faster. I could test that but unless the speedup is dramatic it seems like the potential for problems remain and will just be waiting for a large enough upload to come along to trigger them.
推荐答案
好像你有两种选择：
- 在Apache的清除超时。
- 委派的chunk-组合努力一个单独的线程，并尽快返回到请求的响应成为可能。
通过后一种方式，你将无法让精细上传知道如果块组合操作失败，但也许你可以响应，如确定是否所有的块都可以访问之前执行几个简单的健康检查。
With the latter approach, you will not be able to let Fine Uploader know if the chunk combination operation failed, but perhaps you can perform a few quick sanity checks before responding, such as determining if all chunks are accessible.
有什么精细上传可以在这里做，问题是服务器端。经过精细上传发送请求时，它的任务完成了，直到你的服务器响应。
There's nothing Fine Uploader can do here, the issue is server side. After Fine Uploader sends the request, its job is done until your server responds.
如你所提到的，可能是合理的增加块大小，或进行其它的改变，以加快块组合操作，以减少超时的可能性（如果＃1或＃2的上方是不希望的）。
As you mentioned, it may be reasonable to increase the chunk size or make other changes to speed up the chunk combination operation to lessen the chance of a timeout (if #1 or #2 above are not desirable).
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