ProbeServlet is privileged and cannot be loaded...

An issue with the yum package for Tomcat 6 on RHEL 6 may prevent privileged apps from working correctly (see issue 243 ). You may need to create /etc/tomcat6/Catalina/localhost/probe.xml manually, similar to a Fully Manual Deployment.

Error on first request

Probe uses ServerInfo to determine what server it's running on. If you've changed this property on your server, Probe may give an error when you try to access it. However, you can bypass this issue by forcing Probe to use a specific server adapter:

Open probe.war and edit /WEB-INF/spring-probe-resources.xml.
Find the "containerWrapper" bean.
Toggle the "forceFirstAdaptor" value from false to true.
Ensure that the adapter for your version of Tomcat is listed first in the list of "adaptorClasses." For example, if you are deploying Probe to Tomcat 6, ensure that com.googlecode.psiprobe.Tomcat60ContainerAdaptor is listed first.

Graphs do not display

Run AWT in Headless Mode on UNIX

Some users have experienced problems (see issue 64 ) with graph images not displaying properly, especially when running Tomcat on Sun's JDK for UNIX. If you see a stack trace for a java.lang.NoClassDefFoundError thrown by a class in the org.jfree.chart package, add the following JVM command line option:

-Djava.awt.headless=true

No fonts found in OpenJDK

Some users have experienced problems (see issue 161 ) when running OpenJDK, causing java.lang.Error: Probable fatal error:No fonts found. If switching to the Sun/Oracle JDK is not an option, consider installing a font package.

My problem wasn't listed here

I hate to ask, but are you using the latest version of Probe? Your issue might be fixed already.

Someone might have already found a solution you can apply yourself. Check the list of issues with an ExternalFix.

No fix available? You might not be alone. Search the list of open issues and star your issue to stay informed.

Still no luck? Please file a new issue and provide as much information as you can.