Hi

I periodically receive this exception in tomcat 6.0 with hibernate 3.3 and c3p0 as connection pooling library...
can you point me to docs to further investigate the problem?

thanx

the stack trace is :

6-lug-2009 9.08.31 org.apache.catalina.loader.WebappClassLoader loadClass
INFO: Illegal access: this web application instance has been stopped already. Could not load com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
Exception in thread "Timer-10" java.lang.NoClassDefFoundError: com/mchange/v2/resourcepool/BasicResourcePool$1DestroyResourceTask
java.lang.IllegalStateException
at com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:980)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1273)
at com.mchange.v2.resourcepool.BasicResourcePool.removeResource(BasicResourcePool.java:1406)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at com.mchange.v2.resourcepool.BasicResourcePool.removeResource(BasicResourcePool.java:1378)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at com.mchange.v2.resourcepool.BasicResourcePool.cullExpired(BasicResourcePool.java:1462)
at com.mchange.v2.resourcepool.BasicResourcePool.destroyResource(BasicResourcePool.java:980)
at com.mchange.v2.resourcepool.BasicResourcePool.access$1900(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool.removeResource(BasicResourcePool.java:1406)
at com.mchange.v2.resourcepool.BasicResourcePool$CullTask.run(BasicResourcePool.java:1937)
at com.mchange.v2.resourcepool.BasicResourcePool.removeResource(BasicResourcePool.java:1378)
at java.util.TimerThread.mainLoop(Unknown Source)
at com.mchange.v2.resourcepool.BasicResourcePool.cullExpired(BasicResourcePool.java:1462)
at java.util.TimerThread.run(Unknown Source)
at com.mchange.v2.resourcepool.BasicResourcePool.access$1900(BasicResourcePool.java:32)
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask
at com.mchange.v2.resourcepool.BasicResourcePool$CullTask.run(BasicResourcePool.java:1937)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at java.util.TimerThread.mainLoop(Unknown Source)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at java.util.TimerThread.run(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
6-lug-2009 9.39.12 org.apache.catalina.loader.WebappClassLoader loadClass
... 8 more