-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Gero,
On 12/15/14 8:33 AM, gch...@gmx.de wrote: > we used to deploy our webapp in a tomcat 6.0.35 and want to upgrade > to tomcat 8.0.9. During testing we discovered, that the startup > process of tomcat 8 is twice as long as the startup process of > tomcat 6 (with the same single webapp deployed) > > My test system is as follows: Windows 7, JRE 1.7.0, Tomcat > 6.0.35/8.0.9 > > Inspection of the log files revealed, that the additional time is > used for class loading: > > Log of tomcat 6: ... Nov 28, 2014 5:07:59 PM > org.apache.tomcat.util.digester.Digester endDocument Fein: > endDocument() Nov 28, 2014 5:07:59 PM > org.apache.catalina.loader.WebappClassLoader loadClass Fein: > loadClass(org.springframework.web.util.Log4jConfigListener, false) > ... Fein: Parent class loader is: WebappClassLoader context: > delegate: false repositories: ----------> Parent Classloader: > org.apache.catalina.loader.StandardClassLoader@189ff97 Nov 28, 2014 > 5:08:08 PM org.apache.jasper.compiler.JspRuntimeContext > initClassPath Fein: Compilation classpath initialized: ... Nov 28, > 2014 5:08:08 PM org.apache.jasper.servlet.JspServlet init Fein: > Scratch dir for the JSP engine is: ... Nov 28, 2014 5:08:08 PM > org.apache.jasper.servlet.JspServlet init Fein: IMPORTANT: Do not > modify the generated servlets Nov 28, 2014 5:08:08 PM > org.apache.catalina.core.StandardContext start Fein: Starting > completed ... Nov 28, 2014 5:08:09 PM > org.apache.catalina.startup.Catalina start Information: Server > startup in 10861 ms > > Log of tomcat 8: ... 28-Nov-2014 16:09:09.128 FINER > [localhost-startStop-1] > org.apache.tomcat.util.scan.StandardJarScanner.scan Not scanning > JAR > [file:/C:/Program%20Files/tomcat%208/tolina_webserver-3.0.0-SNAPSHOT-20141103-130423/bin/tomcat-juli.jar] > from classpath 28-Nov-2014 16:09:09.128 FINE > [localhost-startStop-1] > org.apache.catalina.loader.WebappClassLoader.loadClass > loadClass(org.apache.jasper.servlet.JasperInitializer, false) > 28-Nov-2014 16:09:09.128 FINE [localhost-startStop-1] > org.apache.catalina.loader.WebappClassLoader.loadClass Delegating > to parent classloader1 java.net.URLClassLoader@1c47dd5 28-Nov-2014 > 16:09:09.128 FINE [localhost-startStop-1] > org.apache.catalina.loader.WebappClassLoader.loadClass Loading > class from parent ... 28-Nov-2014 16:09:28.362 FINE > [localhost-startStop-1] > org.apache.jasper.compiler.JspRuntimeContext.<init> Parent class > loader is: WebappClassLoader context: /manager delegate: false > ----------> Parent Classloader: java.net.URLClassLoader@1c47dd5 > 28-Nov-2014 16:09:28.362 FINE [localhost-startStop-1] > org.apache.jasper.compiler.JspRuntimeContext.initClassPath > Compilation classpath initialized: ... 28-Nov-2014 16:09:28.362 > FINE [localhost-startStop-1] > org.apache.jasper.servlet.JspServlet.init Scratch dir for the JSP > engine is: ... 28-Nov-2014 16:09:28.362 FINE > [localhost-startStop-1] org.apache.jasper.servlet.JspServlet.init > IMPORTANT: Do not modify the generated servlets 28-Nov-2014 > 16:09:28.362 FINE [localhost-startStop-1] > org.apache.tomcat.util.modeler.Registry.registerComponent Managed= > Catalina:type=JspMonitor,WebModule=//localhost/manager,name=jsp,J2EEApplication=none,J2EEServer=none > > 28-Nov-2014 16:09:28.362 FINE [localhost-startStop-1] org.apache.tomcat.util.modeler.BaseModelMBean.preRegister preRegister org.apache.jasper.servlet.JspServlet@1067d4c Catalina:type=JspMonitor,WebModule=//localhost/manager,name=jsp,J2EEApplication=none,J2EEServer=none > 28-Nov-2014 16:09:28.362 FINE [localhost-startStop-1] > org.apache.catalina.core.StandardContext.startInternal Starting > completed 28-Nov-2014 16:09:28.362 FINE [localhost-startStop-1] > org.apache.catalina.util.LifecycleBase.setStateInternal Setting > state for > [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/manager]] > to [STARTING] 28-Nov-2014 16:09:28.362 FINE [localhost-startStop-1] > org.apache.catalina.util.LifecycleBase.setStateInternal Setting > state for > [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/manager]] > to [STARTED] ... 28-Nov-2014 16:09:28.377 FINE [main] > org.apache.catalina.util.LifecycleBase.setStateInternal Setting > state for [StandardServer[8005]] to [STARTED] 28-Nov-2014 > 16:09:28.377 INFO [main] org.apache.catalina.startup.Catalina.start > Server startup in 21443 ms > > Searching the web and the mail archives resulted in quite a few > hints how to improve performance generally. I followed the > instructions on wiki.apache.org/tomcat/HowTo/FasterStartUp, in > particular: - Disabling JAR scanning (metadata-complete="true", > <absolute-ordering/> in the <web-app>. - in catalina.properties: > tomcat.util.scan.StandardJarScanFilter.jarsToSkip=\*.jar > org.apache.catalina.startup.ContextConfig.jarsToSkip=\*.jar > org.apache.catalina.startup.TldConfig.jarsToSkip=\*.jar Why did you add those back-slashes? > - Removing the web socket API and implementation JARs - Changing > the entropy source (-Djava.security.egd=file:/dev/./urandom) > > These changes were in effect when the above logs were written. > While these changes resulted in a faster startup process (on both > tomcats), I found no clue about why tomcat 8 takes longer in > general to complete server startup. > > I compared the jars loaded in both cases and tried to remove the > two additional jars in tomcat 8. I compared the configurations of > both tomcats and aligned the registered listeners and disabled > XMLValidation and XMLNameSpaceAware in server.xml. I reduced the > bigger MIME-Mapping in web.xml of tomcat 8 to the MIME-Mapping of > tomcat 6. I compared the number of classes and ressources loaded > and the number of ClassNotFound- or RessourceNotFound-Messages in > the log files. > > None of these actions resulted in new insights to the problem. > > Any advice on this subject or any hint to additional ressources > that could help would be appreciated very much. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJUj5RwAAoJEBzwKT+lPKRYmDgP/AgYIDozfN95+kixqvdHhbve xXqpNhkziQO9Z4eGm8hhD1iHPSpY2BOxYhkgYA7K+dhKnYHVQ2eFw/PwksoEaPTW 9F+7urk7mpl6eKkKOf3nqkOoDeS3ZsE8oh4YAH/9GQO0ZgOfL0HWS5/kx4s0mMwA GDPMkVAgzLZa1kt2DmD1P+D2o3Vh4ZuhYqmeZvMhlxWvYTBZcMJ+5iYmlNOYjR7L U5584IRRtH4FK6necwevE9cw2PON5P0Svee0aXtvMprEcnMAOWAkiL6dTTeakq5P KyWraYkbYJz4zrdPstktNFb2e7iZDdUefbRbciEFI4CdIIoF7cX5ny6/179G3vnN knE9GjgMWEoqQ1J3erJba2BmYWmtaNiGjqvX+T32HW0QGyoZbhaf4P4ghXKCHtCr +BCRdPrWXBPbUaDWXC7zuvXcfhbAXE9ap0/dvMrD+iyBspy6EzZfKrzxYt7vE1Aw qni9vCp0xtoYDvjmABDUfZBYd9RSzt4W5WD1iuYVxu25To16sSoJD+shoC9ZJVkX ujzP1K3jwRbKHUI+JuHmrAXjJyPUrDVJIzgv9OIEbCfSWTLTsWXDrvdaWtxQ/aLy gdtcV3pFmQgck45OQzx06S9QrZCofojtOk3WhRrm1/s21PIl/NR/97M1YGV6mzGY I5z/UE7mtcWoulkYT4L6 =jXJw -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
