高并发压力测试，tomcat请求正常，nginx负载均衡Connection refused

[zhang_ya_nan]

用jmeter压力测试，1000个并发请求二者都不会出现错误，5000个请求tomcat访问正常，负载均衡错误率在[0%-80%)之间（前闭后开）完整错误信息如下
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
at org.apache.jmeter.protocol.http.sampler.hc.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:318)
at org.apache.jmeter.protocol.http.sampler.MeasuringConnectionManager$MeasuredConnection.open(MeasuringConnectionManager.java:114)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445)
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.lang.Thread.run(Unknown Source)

[zhang_ya_nan]

请求的信息不完整
POST http://192.168.1.56:81/naire/answerGuest/test

POST data:
id=62&sex=1

[no cookies]

Request Headers:
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded

[zhang_ya_nan]

csdn人才凋敝了吗，那么多文章发表都是靠抄的吗

[睡觉了喂]

兄弟你试试把这个问题分类到运维相关，

[zhang_ya_nan]

自己在nginx找到原因了。对csdn真是失望。大家都不愿贡献，就你回复了，要是需要我把原因私信给你

[zhang_ya_nan]

引用 4 楼 x631617479 的回复:

兄弟你试试把这个问题分类到运维相关，

自己在nginx找到原因了。对csdn真是失望。大家都不愿贡献，就你回复了，要是需要我把原因私信给你

[mogeyua]

啥原因呢，小白就指教~!

[小周小周、快乐无忧]

请问一下，是什么原因，我现在5000并发，ttomcat 和nginx 都是会出现错误率

[zhang_ya_nan]

引用 8 楼 心中的理想 的回复:

请问一下，是什么原因，我现在5000并发，ttomcat 和nginx 都是会出现错误率

windows还是linux

[zhangzhangoa]

楼主怎么解决的