该文详细阐述了ApacheTomcat服务器中NioEndpoint的Poller线程如何工作，从Poller.run开始，经过SocketProcessor的处理，到HTTP请求的完整服务流程，涉及CoyoteAdapter、StandardEngineValve等关键组件在处理HTTP请求时的角色和交互。
完整debug路线
org.apache.tomcat.util.net.NioEndpoint.Poller#run →
org.apache.tomcat.util.net.NioEndpoint.Poller#processKey→
org.apache.tomcat.util.net.AbstractEndpoint#processSocket→
org.apache.tomcat.util.net.SocketProcessorBase#run
org.apache.tomcat.util.net.NioEndpoint.SocketProcessor#doRun
org.apache.coyote.AbstractProtocol.ConnectionHandler#process
org.apache.coyote.AbstractProcessorLight#process
org.apache.coyote.http11.Http11Processor#service
org.apache.catalina.connector.CoyoteAdapter#service
org.apache.catalina.core.StandardEngineValve#invoke
org.apache.catalina.valves.AbstractAccessLogValve#invoke
org.apache.catalina.valves.ErrorReportValve#invoke
org.apache.catalina.core.StandardHostValve#invoke
org.apache.catalina.authenticator.AuthenticatorBase#invoke
org.apache.catalina.core.StandardContextValve#invoke
org.apache.catalina.core.StandardWrapperValve#invoke
org.apache.catalina.core.ApplicationFilterChain#doFilter
org.apache.catalina.core.ApplicationFilterChain#internalDoFilter
javax.servlet.http.HttpServlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequestjavax.servlet.http.HttpServletResponse)
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