How to avoid messages like "Profiler Agent Warning: Failed to lookup cached class org/apache/derby/impl/services/locks/ActiveLock" when profiling a Java application with visualvm?

Question

When trying to monitor a Java application using visualvm I can't obtain useful information, because a lot of my classes (but not only mine) can't be instrumented, displaying the following message:

Profiler Agent Warning: Failed to lookup cached class org/apache/derby/impl/services/locks/ActiveLock

Thus, the profiler doesn't show any information about the method invocation to those classes :-(

Is there any workaround for this problem?

Some details: * OS: Linux 64 bit (Ubuntu 8.10) * Java: sun jdk 1.6.0.14 (64 bit) * VisualVM: 1.1.1 * Application: running on top of Tomcat 5.5.17

Answer 1

This problem should be fixed in VisualVM 1.2.2. For more details see issue #345.