I removed distro pacakged Tomcat from the eqaation, > I've installed > > rpm -qa | grep -i ^tomcat-7 > tomcat-7.0.27-7.1.noarch
replacing it with an upstream instance Server version: Apache Tomcat/7.0.29 Server built: Jul 23 2012 03:15:23 Server number: 7.0.29.0 Repeating the process, at attempt to 'start' the /solr webapp, there's no change. I still get Jul 23, 2012 5:19:01 PM org.apache.catalina.core.ApplicationContext log INFO: HTMLManager: start: Starting web application '/solr' Jul 23, 2012 5:19:01 PM org.apache.catalina.core.StandardContext resourcesStart SEVERE: Error starting static Resources java.lang.IllegalArgumentException: Invalid or unreadable WAR file : /srv/solr_home/solr.war at org.apache.naming.resources.WARDirContext.setDocBase(WARDirContext.java:136) at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4906) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5086) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1247) at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:714) at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:219) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:186) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:1728) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) Jul 23, 2012 5:19:01 PM org.apache.catalina.core.StandardContext startInternal SEVERE: Error in resourceStart() Jul 23, 2012 5:19:01 PM org.apache.catalina.core.StandardContext startInternal SEVERE: Error getConfigured Jul 23, 2012 5:19:01 PM org.apache.catalina.core.StandardContext startInternal SEVERE: Context [/solr] startup failed due to previous errors Jul 23, 2012 5:19:01 PM org.apache.catalina.util.LifecycleBase stop INFO: The stop() method was called on component [WebappLoader[/solr]] after stop() had already been called. The second call will be ignored. Jul 23, 2012 5:19:01 PM org.apache.catalina.core.ApplicationContext log INFO: HTMLManager: list: Listing contexts for virtual host 'localhost' Any suggestions how to troubleshoot this?