我观察到 JMeter 和简单的 Spring Boot Web 服务器之间存在奇怪的行为,它们都在我的本地计算机上运行。
我在多个线程中同时运行一个简单的 Web 服务调用。当我将 JMeter 设置为运行 2000 个线程时,一切正常。当我将其设置为 2001 时,大多数请求都会失败。
2000 是一个什么样的神奇数字?哪些设置导致了这个限制?
配置:
我发现了一个听起来类似的问题JMeter线程用户限制 - 并发执行5000个线程但它似乎没有涵盖相同的问题。
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/person")
public class PersonController {
@GetMapping
public String getPerson() {
return "John";
}
}
server.port=9001
server.tomcat.threads.max=10000
server.tomcat.max-connections=10000
server.tomcat.accept-count=10000
MyApplication : Starting MyApplication using Java 21 with PID 71328
MyApplication : No active profile set, falling back to 1 default profile: "default"
o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 9001 (http)
o.apache.catalina.core.StandardService : Starting service [Tomcat]
o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.15]
o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 671 ms
o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 9001 (http) with context path ''
MyApplication : Started MyApplication in 1.302 seconds (process running for 1.812)
o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
o.s.web.servlet.DispatcherServlet : Completed initialization in 2 ms
JMeter 将每个错误显示为
HttpHostConnectException
,并且调用似乎根本没有到达 Spring Boot 应用程序:
org.apache.http.conn.HttpHostConnectException: Connect to localhost:9001 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:156)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl$JMeterDefaultHttpClientConnectionOperator.connect(HTTPHC4Impl.java:409)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.executeRequest(HTTPHC4Impl.java:940)
at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:651)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:66)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1311)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1300)
at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.net.ConnectException: Connection refused: connect
at java.base/sun.nio.ch.Net.connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:589)
at java.base/sun.nio.ch.Net.connect(Net.java:578)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:583)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
at java.base/java.net.Socket.connect(Socket.java:751)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
... 19 more
这听起来像是您操作系统的网络配置问题,您可以尝试做的事情是:
还有一些其他需要考虑的事情: