Apple

Persistent session storage with multiple stateless instances should give the same effect without the leak though :-)

On May 30, 2012, at 8:31 AM, John Huss wrote:

Does that mean you have a fix coming? :-)

On Wed, May 30, 2012 at 10:16 AM, Ramsey Gurley <email@hidden> wrote:

On May 30, 2012, at 7:13 AM, John Huss wrote:

I would go with wotaskd/monitor. You can more easily run multiple instances; each instance gives you another database connection.

Alternatively, you can set the property:
er.extensions.ERXObjectStoreCoordinatorPool.maxCoordinators=3
And this will give you a pool of database connections (and EOF stacks). It will use more memory though. Also, I have a suspicion that this can cause deadlocks occasionally, but nothing confirmed.
John

I can confirm that the ERXObjectStoreCoordinatorPool will leak snapshots until the app falls over :-)

On Wed, May 30, 2012 at 9:04 AM, Ron Lift <email@hidden> wrote:
I have been doing some more research and I am beginning to think this post describes the cause of the issue

http://stackoverflow.com/questions/3320400/to-prevent-a-memory-leak-the-jdbc-driver-has-been-forcibly-unregistered

Has anyone deployed and application to production with either Tomcat 6 or 7 with these messages? If so, did they have any issues?

We are using out of the box EOF, the article talks about the need for connection pooling. I have read the Cayenne supports connection pooling. Does EOF?

Or maybe we switch to monitor for deployment on RHEL6. I read the articles and considering it. Anyone done this?

On Tue, May 29, 2012 at 3:30 PM, D Tim Cummings <email@hidden> wrote:

I have noticed these messages too and would like to know if there is anything that can be done about them

Tim

On 29/05/2012, at 23:31, Ron Lift <email@hidden> wrote:

At work we are migrating from RHEL 5 to RHEL 6 and also upgrading to Tomcat 6. When I deploy the current application that is running on Tomcat 5.5 to tomcat 6, I see the following messages in the catalina.out when I either deploy the app, start/ stop the app or the tomcat instance. I do not have these messages in my tomcat 5.5 log files. Is there some setting that I am missing? Any help will be greatly appreciated
Eclipse 3.6.1 , WOLips 3.6. MSSQL 2008R2 Database.

The last 2 messages repeat multiple times

May 29, 2012 8:59:00 AM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/CoopApp] 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.

May 29, 2012 8:59:00 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/CoopApp] created a ThreadLocal with key of type [er.extensions.eof.ERXEC$1] (value [er.extensions.eof.ERXEC$1@1083964f]) and a value of type [java.util.Vector] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.

May 29, 2012 8:59:00 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/CoopApp] created a ThreadLocal with key of type [er.extensions.foundation.ERXThreadStorage.ERXThreadStorageCloneableThreadLocal] (value [er.extensions.foundation.ERXThreadStorage$ERXThreadStorageCloneableThreadLocal@2f012501]) and a value of type [java.util.HashMap] (value [{}]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.

Ron Lift
C-E

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References:
	>New Tomcat 6 Deployment (From: Ron Lift <email@hidden>)
	>Re: New Tomcat 6 Deployment (From: D Tim Cummings <email@hidden>)
	>Re: New Tomcat 6 Deployment (From: Ron Lift <email@hidden>)
	>Re: New Tomcat 6 Deployment (From: John Huss <email@hidden>)
	>Re: New Tomcat 6 Deployment (From: Ramsey Gurley <email@hidden>)
	>Re: New Tomcat 6 Deployment (From: John Huss <email@hidden>)