JMeter 压测指南：解决 Socket closed 异常的实用技巧

问题描述

JMeter 压测时会报 java.net.SocketException: Socket closed

java.net.SocketException: Socket closed at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668) at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:542) at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:414) at org.apache.jmeter.protocol.http.sampler.LazySchemeSocketFactory.connectSocket(LazySchemeSocketFactory.java:97) 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:695) at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:454) 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:498) at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:424) at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:255) at java.lang.Thread.run(Thread.java:766)

可能原因

引起 java.net.SocketException: Socket closed 错误的原因通常是未设置连接的超时时间。

解决方案

如果在 “HTTP Request Sampler” 的 Basic 里选中了 “Use KeepAlive”

则需要在 Advanced 页签下设置如下参数：

• 选择 Implementation 为 HttpClient4。
• Connect 设置一个连接空闲超时时间，避免由于没收到被压测端返回的 Keep-Alive 的Header 而导致连接断开。

知识扩展：

• JMeter 并发测试和持续性压测详解
• 如何快速搭建 JMeter 集群压测环境