SpringBoot优化内嵌的Tomcat ---设置MaxConnections

使用kill -9杀掉springboot应用后，立马java -jar重启，会报错，需要等待一段时间才能启动成功，
报错的原因是：/tmp/tomcat-docbase.4749794910434376321.9086] is not valid
以下是详细错误信息：

Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@53001498]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:158) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4831) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4963) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4]
... 7 more
Caused by: java.lang.IllegalArgumentException: The main resource set specified [/tmp/tomcat-docbase.4749794910434376321.9086] is not valid at org.apache.catalina.webresources.StandardRoot.createMainResourceSet(StandardRoot.java:725) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4] at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:686) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:152) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4] at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4831) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4963) ~[tomcat-embed-core-8.5.4.jar!/:8.5.4] ... 7 more mealtime-report-[15:48:37:716] [ERROR] - org.apache.juli.logging.DirectJDKLog.log(DirectJDKLog.java:181) - A child container failed during start

[root@localhost tmp]# ls -dlt tomcat*
drwxr-xr-x 3 root root 4096 May 15 14:19 tomcat.2482651926943103152.4444 drwxr-xr-x 2 root root 4096 May 15 14:19 tomcat-docbase.1606353072223048027.4444 drwxr-xr-x 3 root root 4096 May 15 14:19 tomcat.6427937730432992105.4004 drwxr-xr-x 2 root root 4096 May 15 14:19 tomcat-docbase.9014354490424152602.4004 drwxr-xr-x 3 root root 4096 May 14 18:21 tomcat.365692316696650885.2000 drwxr-xr-x 2 root root 4096 May 14 18:21 tomcat-docbase.8871210702020412482.2000 drwxr-xr-x 3 root root 4096 May 14 18:21 tomcat.9194454391130879725.2222 drwxr-xr-x 2 root root 4096 May 14 18:21 tomcat-docbase.6449009990528406178.2222 drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.7533402776366547594.3333 drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.8347169054078560101.3333 drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.5755321441664547955.3004 drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.4368794759444711233.3004 drwxr-xr-x 3 root root 4096 May 11 16:31 tomcat.7487101127514666304.4444 drwxr-xr-x 2 root root 4096 May 11 16:31 tomcat-docbase.3505389582011000978.4444 drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.6483749742824168608.4004 drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.2936863713994400124.4004 drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.8814016287852028090.2000 drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.5759661693624441557.2000 drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.3084296173620137759.2222 drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.2913734529869658765.2222 drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.1261539854295462589.3333 drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.4327066414867055940.3333 drwxr-xr-x 3 root root 4096 May 11 16:30 tomcat.1652439996406851728.3004 drwxr-xr-x 2 root root 4096 May 11 16:30 tomcat-docbase.5233226104416503892.3004 drwxr-xr-x 3 root root 4096 May 11 11:38 tomcat.8505864110333115533.3333 drwxr-xr-x 2 root root 4096 May 11 11:38 tomcat-docbase.5036544091928181133.3333 drwxr-xr-x 3 root root 4096 May 11 11:37 tomcat.494020510980868278.3004 drwxr-xr-x 2 root root 4096 May 11 11:37 tomcat-docbase.468265602651303178.3004 drwxr-xr-x 3 root root 4096 May 11 11:36 tomcat.8093369488059063930.3004 drwxr-xr-x 2 root root 4096 May 11 11:36 tomcat-docbase.7679645853200594654.3004 drwxr-xr-x 3 root root 4096 May 11 11:31 tomcat.5040740781547956399.4444 drwxr-xr-x 2 root root 4096 May 11 11:31 tomcat-docbase.8256790475295084303.4444 drwxr-xr-x 3 root root 4096 May 11 11:31 tomcat.7344112750169248130.4004 drwxr-xr-x 2 root root 4096 May 11 11:31 tomcat-docbase.2016044219412775812.4004 drwxr-xr-x 3 root root 4096 May 11 11:30 tomcat.3866209351076068036.4444

SpringBoot测试版本

<parent>  
    <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.3.3.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> 

SpringBoot默认使用的是Tomcat作为web server

springboot中默认可以通过配置如下参数设置内嵌容器Tomcat的端口，最大线程数等等

server.port=8081
server.tomcat.max-threads=1000

但是，无法设置最大连接数，而最大连接数直接影响到Tomcat的性能，如何调整这个最大连接数呢？

以下有三种方法

一：

import org.apache.catalina.connector.Connector;  
import org.apache.coyote.http11.Http11NioProtocol;  
import org.springframework.boot.context.embedded.EmbeddedServletContainer; import org.springframework.boot.context.embedded.ServletContextInitializer; import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory; import org.springframework.stereotype.Component; @Component() public class MyEmbeddedServletContainerFactory extends TomcatEmbeddedServletContainerFactory { public EmbeddedServletContainer getEmbeddedServletContainer(ServletContextInitializer... initializers) { //设置端口 this.setPort(8081); return super.getEmbeddedServletContainer(initializers); } protected void customizeConnector(Connector connector) { super.customizeConnector(connector); Http11NioProtocol protocol = (Http11NioProtocol)connector.getProtocolHandler(); //设置最大连接数 protocol.setMaxConnections(2000); //设置最大线程数 protocol.setMaxThreads(2000); protocol.setConnectionTimeout(30000); } } 

二：

import org.apache.catalina.connector.Connector;  
import org.apache.coyote.http11.Http11NioProtocol;  
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory; import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer; import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class WebServerConfiguration { @Bean public EmbeddedServletContainerFactory createEmbeddedServletContainerFactory() { TomcatEmbeddedServletContainerFactory tomcatFactory = new TomcatEmbeddedServletContainerFactory(); tomcatFactory.setPort(8081); tomcatFactory.addConnectorCustomizers(new MyTomcatConnectorCustomizer()); return tomcatFactory; } } class MyTomcatConnectorCustomizer implements TomcatConnectorCustomizer { public void customize(Connector connector) { Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler(); //设置最大连接数 protocol.setMaxConnections(2000); //设置最大线程数 protocol.setMaxThreads(2000); protocol.setConnectionTimeout(30000); } } 

 

三：

import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;  
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;  
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class WebServerConfiguration { @Bean public EmbeddedServletContainerCustomizer createEmbeddedServletContainerCustomizer() { return new MyEmbeddedServletContainerCustomizer(); } } class MyEmbeddedServletContainerCustomizer implements EmbeddedServletContainerCustomizer { public void customize(ConfigurableEmbeddedServletContainer container) { TomcatEmbeddedServletContainerFactory tomcatFactory = (TomcatEmbeddedServletContainerFactory)container; tomcatFactory.setPort(8081); //下面的操作可以参照上面的方法  } } 

最后，如果发现没有生效，就把application.properties配置里面关于Tomcat的一些配置(server.*)全部删掉，就OK了。

http://blog.csdn.net/mn960mn/article/details/51306140