imac
jmeter-4.0
jmeter报错信息：
org.apache.http.NoHttpResponseException: 192.168.1.139:9111 failed to respond
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:141)
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:286)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:257)
at org.apache.jmeter.protocol.http.sampler.hc.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:199)
at org.apache.jmeter.protocol.http.sampler.MeasuringConnectionManager$MeasuredConnection.receiveResponseHeader(MeasuringConnectionManager.java:212)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125)
at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:684)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:486)
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.executeRequest(HTTPHC4Impl.java:697)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:455)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1189)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1178)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:490)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:416)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:250)
at java.base/java.lang.Thread.run(Thread.java:844)
解决：
1.取消勾选Use Keep-alive
2.编辑 bin目录下的jmeter.properties文件
#httpclient4.idletimeout=0 这一行放开注释
修改idletimeout的时间，设置成自己认为合理的时间，一般可设置成10-60s，表示连接空暇10s后才会断开，这里单位是ms。
例如 httpclient4.idletimeout=11000 表示连接空暇11s后才会断开
如下图：
具体原因、细节参考：
https://wiki.apache.org/jmeter/JMeterSocketClosed
https://jingyan.baidu.com/article/c33e3f48ffe529ea15cbb596.html