Jenny,
On 5/31/24 14:52, Ying Jin wrote:
We removed the ojdbc8 driver jar from web-inf/lib from the web
application and kept the ojdbc8 jar file in the Tomcat/lib folder, but
we still can see the following memory link warning message whenever we
redeploy the web application. We use the Tomcat 9 server in the Linux
environment.
This list strips attachments. Can you re-post with text-only?
The other warning message is about the "validateFile Problem with jar
file /tomcat/lib/jolokia.jar. My question is if we can safely ignore
these warning messages or not.
It would be great if you can shed some light on this issue.
If the message is something like "driver cannot be unloaded" then check
Tomcat with a debugger or even something like JVisualVM to see how many
WebappClassLoaders you have in memory.
If the driver causes the web application ClassLoader to be "pinned" in
memory, then it will never be removed and all those classes will
continue to use-up heap space until you restart the JVM. This gets worse
every time you reload your application without restarting the JVM. The
Manager application web UI can help you diagnose these a little.
The validation problem with the Jolokia JAR file will depend upon
exactly what it says. I would first get a replacement copy of the
Jolokia JAR file before bothering to try to diagnose it any further.
-chris
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