The following snippet of code will bring a JVM down by filling up the perm gen heap.

for (int i = 0; i < 10000; i++) { new ConfigSlurper().parse("foo = 'bar'"); println i }

8078 8079 8080 Caught: java.lang.OutOfMemoryError: PermGen space at groovy.util.ConfigSlurper.parse(ConfigSlurper.groovy:123)

A line from jmap -permstat

class_loader classes bytes parent_loader alive? type

0x9527de80 23 96536 0x9527d940 dead groovy/lang/GroovyClassLoader$InnerLoader@0x91620470

For every iteration there will be an instance like the one above.

Our application using Groovy config files extensively. It also reloads these files at a frequent rate. This problem is causing quite a bit of pain at the moment.

Any ideas?