我正在做一个域的性能测试。 我得到Non HTTP response message: The target server failed to respond response message.Jmeter给NoHttpResponseException：目标服务器无法响应错误

下面是日志的快照。

Connection: keep-alive

Accept-Language: de

Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, */*

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0

Accept-Encoding: gzip, deflate

Pragma: no-cache

Authorization: Basic Y2FzZXdvcmtlcjAxOjFxYXkiV1NY

Content-Type: application/x-www-form-urlencoded

Content-Length: 218

Host: mydomain.test.com

org.apache.http.NoHttpResponseException: The target server failed to respond

at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:95)

at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:61)

at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:254)

at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:289)

at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:252)

at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:191)

at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:300)

at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:127)

at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:715)

at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:520)

at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)

at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)

at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.executeRequest(HTTPHC4Impl.java:481)

at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:298)

at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)

at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1105)

at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1094)

at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:429)

at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:257)

at java.lang.Thread.run(Unknown Source)

我试了几次。甚至尝试减少线程数量并以非常小的负载运行。

但是，每次，对于相同的测试用例(高负载和低负载)，我都会得到40％的错误率。

Apache日志很干净。日志中没有错误。

请建议我还能检查什么。