ab测试Failed requests问题

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今天测试自己写的nginx模块时，出现下面

Server Software: nginx/1.0.4

Server Hostname: 192.168.13.105

Server Port: 8100



Document Path: /notice.txt

Document Length: 15 bytes



Concurrency Level: 10

Time taken for tests: 1.783407 seconds

Complete requests: 10000

Failed requests: 5746

(Connect: 0, Length: 5746, Exceptions: 0)

Write errors: 0

Total transferred: 2034960 bytes

HTML transferred: 154772 bytes

Requests per second: 5607.25 [#/sec] (mean)

Time per request: 1.783 [ms] (mean)

Time per request: 0.178 [ms] (mean, across all concurrent requests)

Transfer rate: 1114.16 [Kbytes/sec] received

但是在ab测试过程中，我手动请求测试url返回正常，而且Requests per second也有5600rps,证明响应很快啊，google了一下，网上有人说是页面内容问题。我把我代码改一下，返回相同的内容后，再测试一下发现：

Failed requests: 0

原来ab测试的错误请求是根据内容来判断的呀

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