我用Jmeter2.13測試網(wǎng)站一個http請求，服務(wù)器是tomcat7，測試500個線程數(shù)正常，增加到750就會出現(xiàn)connection refused錯誤，而且一般是最后的請求出現(xiàn)錯誤，前面仍是對的。試了網(wǎng)上一些方法增加tomcat7 server.xml最大線程數(shù)，修改系統(tǒng)參數(shù)等都不行。此時CPU內(nèi)存帶寬IO都是沒有滿的，所以不知瓶頸在何處？？希望有遇到過類似情況或者知道的人能解答，謝謝！結(jié)果樹中錯誤代碼如下：org.apache.http.conn.HttpHostConnectException: Connection to http://10.0.0.160:8080 refusedat org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:190)at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)at org.apache.jmeter.protocol.http.sampler.MeasuringConnectionManager$MeasuredConnection.open(MeasuringConnectionManager.java:107)at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:643)at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)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.executeRequest(HTTPHC4Impl.java:517)at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:331)at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1146)at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1135)at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:434)at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:261)at java.lang.Thread.run(Unknown Source)Caused by: java.net.ConnectException: Connection timed out: connectat 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)