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From Yaragalla Muralidhar <yaragallamur...@gmail.com>
Subject Re: Startup of tomcat 8 takes twice as long as startup of tomcat 6
Date Mon, 15 Dec 2014 13:40:39 GMT
for me it is taking more than that. I have deployed a simple war file. It
took so long to deploy it.

omcat-8.0.15\webapps\ROOT has finished in 240 ms
15-Dec-2014 19:08:32.348 INFO [main]
org.apache.coyote.AbstractProtocol.start St
arting ProtocolHandler ["http-nio-8080"]
15-Dec-2014 19:08:32.357 INFO [main]
org.apache.coyote.AbstractProtocol.start St
arting ProtocolHandler ["ajp-nio-8009"]
15-Dec-2014 19:08:32.360 INFO [main]
org.apache.catalina.startup.Catalina.start
Server startup in 336069 ms


*Thanks and Regards,*
Muralidhar Yaragalla.

*http://yaragalla.blogspot.in/ <http://yaragalla.blogspot.in/>*

On Mon, Dec 15, 2014 at 7:03 PM, gchris@gmx.de <gchris@gmx.de> wrote:
>
>
>
> Hi,
>
> 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
> - 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.
>
> Best regards,
> Gero
>
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