Tomcat startup problems (MySQL driver)

[Joe San]

Guys,

I have some problems with my Tomcat startup especially when I have my app deployed. Following is what I see.

Dec 8, 2010 8:14:21 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory examples
Dec 8, 2010 8:14:21 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory docs
Dec 8, 2010 8:14:21 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory ROOT
Dec 8, 2010 8:14:22 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
Dec 8, 2010 8:14:22 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [] startup failed due to previous errors
Dec 8, 2010 8:14:22 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [] registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the 
web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
Dec 8, 2010 8:14:22 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [Timer-1] but has failed to stop it. 
This is very likely to create a memory leak.
Dec 8, 2010 8:14:22 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [] appears to have started a thread named [MySQL Statement Cancellation Timer] 
but has failed to stop it. 
This is very likely to cre:

Any suggestions on what the issue could be?

[Tim Holloway]

Well, I don't like a context name of "[]". It should be something like "/" or "/myapp". Maybe you deployed an app with context name = ""?

[Joe San]

I can check that, but what has that got to do with the exception that I get here with respect to the MySQL driver? Any ideas?

[Tim Holloway]

Joe Harry wrote:I can check that, but what has that got to do with the exception that I get here with respect to the MySQL driver? Any ideas?

When I have an error coming from a bad app, the first thing I do is find out what's wrong with the app. Fixing that often fixes the other errors.

[Joe San]

Do I specify my context name in the context.xml of Tomcat?

[Tim Holloway]

Joe Harry wrote:Do I specify my context name in the context.xml of Tomcat?

http://tomcat.apache.org/tomcat-6.0-doc/config/context.html

And ignore what it says about server.xml. Someone needs to update that.

Typical usage:

<Context path="/myapp"
    docBase="/srv/tomcat/webapps/myapp.war"
    debug="0" privileged="true"
>

[Joe San]

did you mean that I have to create a context.xml for my web app and place it under META-INF of my web app?

[Tim Holloway]

You can do that. Or you can create a file with a Tomcat Context in it and place it in TOMCAT_HOME/conf/Catalina/localhost. Since there can be multiple contexts in there, obviously they can't all be named "context.xm", but any file with an ".xml" suffix will be scanned by Tomcat and the name of the file doesn't have to match the context. Although it makes life easier if they do match.