CODEWITHSUNDEEP
javagarbage-collectionout-of-memorynewreliceclipse-mat
Sam
Sam

Reputation: 244

Out-of-memory : Metaspace

I am getting Out-of-memory in Metaspace. As I understood after googling that Out-of-memory in Metaspace error comes could be due to the leak in Classloader. So, for this I started analyzing the Heap dump in Eclipse MAT and opened 'Class Loader Explorer' which gives following : enter image description here

As I understood from the above data, that com.newrelic.bootstrap.BootstrapAgent$JVMAgentClassLoader is occupying 396,707 instances which were not garbage collected. Is my understanding correct?

After I selected this row and opend "Path to GC Roots -> exclude all phantom/weak/soft Ref" and I observed that Shallow and Retained Heap are 96 and 231,040 respectively.

After I selected another row in 'Class Loader Explorer' for the class org.apache.felix.framework.BundleWiringImpl$BundleClassLoader and again opend "Path to GC Roots -> exclude all phantom/weak/soft Ref" and now I see this data :

enter image description here

From this data, is it safe to conclude that in this class there is a leak : com.newrelic.agent.util.DefaultThreadFactory$AgentThreadImpl which is not garbage collected?

If not then please suggest what else I should check?

Upvotes: 0

Views: 618

Answers (1)

user13762112
user13762112

Reputation: 441

com.newrelic.bootstrap.BootstrapAgent$JVMAgentClassLoader is occupying 396,707 instances which were not garbage collected. Is my understanding correct? That means that com.newrelic.bootstrap.BootstrapAgent$JVMAgentClassLoader has loaded 2627 classes and there are 396,707 instances of those classes. In itself, that doesn't look like a problem.

The Duplicate Classes might be a good query to run to see if a class has been loaded in one classloader, then loaded again (possibly because it was updated), but the old class loader wasn't freed.

Is the thread com.newrelic.agent.util.DefaultThreadFactory$AgentThreadImpl supposed to be alive. Check with the Thread Overview query to find what it is doing?

Upvotes: 0

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