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Troubleshooting VisualVM

DZone's Guide to

Troubleshooting VisualVM

· Performance Zone ·
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SignalFx is the only real-time cloud monitoring platform for infrastructure, microservices, and applications. The platform collects metrics and traces across every component in your cloud environment, replacing traditional point tools with a single integrated solution that works across the stack.

Today I encountered a strance error opening both Java Mission Control and VisualVM: “Could not open PerfMemory” and “Local Java applications cannot be monitored”:

 





 

After searching and testing for quite a while, I read the solution at the VisualVM troubleshooting guide:

Local Applications Cannot Be Monitored (Error Dialog On Startup)
Description: An error dialog saying that local applications cannot be monitored is shown immediately after VisualVM startup. Locally running Java applications are displayed as <Unknown Application> (pid ###).
Resolution:  This can happen on Windows systems if the username contains capitalized letters. In this case, username is UserName but the jvmstat directory created by JDK is %TMP%\hsperfdata_username. To workaround the problem, exit all Java applications, delete the %TMP%\hsperfdata_username directory and create new %TMP%\hsperfdata_UserName directory.

That's it for this post. Hope I helped someone searching a little less for a solution for this little bugger. :)

SignalFx is built on a massively scalable streaming architecture that applies advanced predictive analytics for real-time problem detection. With its NoSample™ distributed tracing capabilities, SignalFx reliably monitors all transactions across microservices, accurately identifying all anomalies. And through data-science-powered directed troubleshooting SignalFx guides the operator to find the root cause of issues in seconds.

Topics:
java ,java virtual machine ,performance

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