[Jmeter并发报错解决方案]org.apache.http.NoHttpResponseException: 10.0.4.147:8000 failed to respond

背景：公司模型框架是Nginx+uwsgi+Django+nginx，一开始使用Jmeter进行高并发请求测试，发现成功率只有50%，换用postman，成功率100%，代码进行高并发一样不会报错。

问题：

Jmeter进行高并发，第一个接口成功，第二个失败，第三个又成功，第四个失败。。。依次类推，保持50%的失败率，失败报错如下：

org.apache.http.NoHttpResponseException: **.**.**.***:***** failed to respond
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:)
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:)
at org.apache.jmeter.protocol.http.sampler.hc.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:)
at org.apache.jmeter.protocol.http.sampler.MeasuringConnectionManager$MeasuredConnection.receiveResponseHeader(MeasuringConnectionManager.java:)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:)
at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.executeRequest(HTTPHC4Impl.java:)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:)
at java.lang.Thread.run(Thread.java:)

因为模型接口是用python写的，报错代码显示java，所以一开始认为是Jmeter的问题，换了一个工具，postman，进行并发测试，果然没有抛错，但是学无止境，作为一个优秀的测试工具，不应该有这个问题啊，所以继续挖掘解决方案。

解决方案：

取消勾选Use Keep-alive，这样连接就不会复用，也就不存在空闲超时，被服务端干掉的情况了。

但带来的是性能的开销，因为tcp每次都要关闭然后重建。

参考：

https://blog.****.net/z_erduo/article/details/81084003