从Tomcat 6升级时拒绝BigIP-Tomcat 8连接

Question

Tomcat开始侦听端口，并且应用程序也得到部署，但是当我访问URL时，我得到连接拒绝错误。BigIP无法识别服务器上Tomcat8打开的端口是否有问题？

虽然当我返回到Tomcat6（启动和停止它），然后再次尝试使用Tomcat8，它有时开始接收连接，这很奇怪，我无法找到原因。会有什么问题？

Jun 13, 2017 5:56:32 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Valve} Setting property 'resolveHosts' to 'false' did not find a matching property.

Jun 13, 2017 5:56:32 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: :/myPath/lib

Jun 13, 2017 5:56:32 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-9030"]

Jun 13, 2017 5:56:32 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 854 ms

Jun 13, 2017 5:56:32 AM org.apache.catalina.users.MemoryUserDatabase open
SEVERE: The specified user database [conf/tomcat-users.xml] could not be found

Jun 13, 2017 5:56:32 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina

Jun 13, 2017 5:56:32 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.0.30

Jun 13, 2017 5:56:33 AM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skippin
g unneeded JARs during scanning can improve startup time and JSP compilation time.

Jun 13, 2017 5:56:33 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /mypath/MyWar.war

Jun 13, 2017 5:56:43 AM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skippin
g unneeded JARs during scanning can improve startup time and JSP compilation time.

Jun 13, 2017 5:56:43 AM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath

Jun 13, 2017 5:56:43 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext

Jun 13, 2017 5:57:06 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'myServlet'

Jun 13, 2017 5:57:06 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deployment of web application archive /mypath/MyWar.war has finished in 33,424 ms

Jun 13, 2017 5:57:06 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-9030"]'

Jun 13, 2017 5:57:06 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 33845 ms

Answer 1

每个传入请求都需要一个线程来维持该请求的持续时间。如果接收到的同时请求比当前可用的请求处理线程所能处理的多，则将创建额外的线程，直到配置的最大值（maxThreads属性的值）。如果接收到更多的同时请求，它们将堆叠在连接器创建的服务器套接字中，直至配置的最大值（acceptCount属性的值）。任何进一步的同时请求都将收到“连接被拒绝”错误，直到有可用的资源来处理它们。

详情请访问https://tomcat.apache.org/tomcat-8.0-doc/config/http.html