Hi all, does anyone else ever see weird compile and IO errors when Tomcat is restarted under load, in response to HTTP requests from robots?
We have a JSP/Servlet based site running multiple Apache Tomcat 5.5 servers on Linux. We set reloadable to false in our server.xml, and when we update our code, we push the new code and then restart each app server (we have several servers running Tomcat 5.5 behind a load balancer). During these restarts, we intermittently see JasperException compiling JSPs, ClassNotFoundExceptions on tag files, and IOExceptions on tmpFile.renameTo(classFile). These weird exceptions occur ONLY when we are starting up our servers again. At all other times, our Tomcat servers run fine with no similar exceptions. I've also noticed that most of these exceptions occur for HTTP requests with user agents for Yahoo Slurp, GoogleBot, or curl, indicating that it is a robot hitting our site so quickly and so soon after the Tomcat servers are restarted. But shouldn't Tomcat block any HTTP requests until it is actually ready to process them without any weird compile errors? Here are examples of these intermittent exceptions that we see during these startup windows: org.apache.jasper.JasperException: Unable to compile class for JSP at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:3 28) at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:297) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:276) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:264) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:5 63) java.lang.ClassNotFoundException: org.apache.jsp.tag.web.error_tag at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:133) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:65) at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:596) at org.apache.jasper.servlet.JspServletWrapper.loadTagFile(JspServletWrapper.ja va:219) at org.apache.jasper.compiler.TagFileProcessor.loadTagFile(TagFileProcessor.jav a:515) at org.apache.jasper.compiler.TagFileProcessor.access$000(TagFileProcessor.java :48) java.io.IOException: tmpFile.renameTo(classFile) failed at org.apache.jasper.compiler.SmapUtil$SDEInstaller.install(SmapUtil.java:245) at org.apache.jasper.compiler.SmapUtil.installSmap(SmapUtil.java:164) at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:429) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:297) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:276) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:264) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:5 63) Thank you if you have any idea what is causing this or how to get Tomcat to wait until it is ready before responding to HTTP requests. Jonathan --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
