使用JMeter与1000位用户进行负载测试时，Apache Tomcat Connection Refused错误

问题描述

我已经在linux和Apache Tomcat 7.0.42中部署了Java EE应用程序

I have deployed a Java EE application in linux and Apache Tomcat 7.0.42

当我使用JMeter对100个用户进行负载测试(并发100个线程请求)时，一切都正常运行

Everything works fine when I load test for 100 users using JMeter(concurrent 100 threads requests)

但是，一旦我将用户(或线程数)更改为1000个服务器，它就会被阻塞，并且它会在〜600之后为所有请求给出连接被拒绝"错误.

But as soon as I change the users(or number of threads) to 1000 server is choked and it gives "Connection refused" error for all the requests after ~600.

我已经在应用程序中进行了所有的微调，它现在更多的是静态网页，即使这样它也会返回错误.

I have done all fine tuning in the application and it is more of of a static web page now, even then it comes back with error.

服务器配置:Ubuntu，8个vCPU/32 GB RAM/960GB HD

Server Configuration: Ubuntu, 8 vCPU / 32 GB RAM / 960 GB HD

PS:同一应用程序在AWS(Amazon Web Services)中运行良好，因此您可以排除运行JMeter(client)的计算机出现任何问题

PS: The same application works well in AWS(Amazon Web Services), so you can rule out any problem with my machine running JMeter(client)

    org.apache.http.conn.HttpHostConnectException: Connection to http://a.b.c.d:8080 refused
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:190)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:645)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:480)
    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.sample(HTTPHC4Impl.java:286)
    at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:62)
    at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1088)
    at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1077)
    at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:428)
    at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:256)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(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:127)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
    ... 12 more

推荐答案

尝试在server.xml中调整http连接器的maxThreads和acceptCount属性:

Try adjusting the maxThreads and acceptCount attributes of the http connector in server.xml:

参考: http://tomcat.apache.org/tomcat- 7.0-doc/config/http.html

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