-----Original Message-----
From: David kerber [mailto:dcker...@verizon.net] 
Sent: Thursday, February 12, 2015 9:40 AM
To: Tomcat Users List
Subject: Re: tomcat severe error when shutting down service but startup is clean

On 2/12/2015 9:06 AM, Wirth, Kevin wrote:
> I keep getting these weird tomcat errors on shutdown on a newly built system 
> using tomcat 7.0.57 on  a windows 2012 server with jdk 1.7 that I can't 
> figure out.  This is the catalina log:
> Feb 12, 2015 8:54:31 AM org.apache.catalina.loader.WebappClassLoader 
> clearReferencesJdbc
> SEVERE: The web application [/identityiq] registered the JDBC driver 
> [com.microsoft.sqlserver.jdbc.SQLServerDriver] but failed to unregister it 
> when the web application was stopped. To prevent a memory leak, the JDBC 
> Driver has been forcibly unregistered.
> Feb 12, 2015 8:54:31 AM org.apache.catalina.loader.WebappClassLoader 
> clearReferencesThreads
> SEVERE: The web application [/identityiq] appears to have started a thread 
> named [Thread-3] but has failed to stop it. This is very likely to create a 
> memory leak.

>>> I ran into this a while back, and it means exactly what it says:  the db 
>>> driver is being registered (loaded), but not being unloaded.  I fixed it by 
>>> putting the db driver unload commands in a contextDestroyed method.

David

I have the same issue as Kevin.  What "unload commands" code did you call in 
the contextDestroyed method?  Are those methods "universal"?  The reason I ask 
is because we use different ODBC drivers for different environments.

>
> The jdbc driver I am using is in the folder identityiq under the webapps 
> directory in tomcat.  It is the sqljdbc4.jar driver.  This driver is not in 
> the tomcat\lib directory.  Please help because I am getting no help from the 
> vender.  Thank you.
>
> Kevin Wirth
> [...]
>


--
Cris Berneburg, Lead Software Engineer
CACI, IRMA Project, 703-679-5313


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