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https://issues.apache.org/jira/browse/GROOVY-8189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025940#comment-16025940
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Jochen Kemnade commented on GROOVY-8189:
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The second case is not relevant for my use case as my scripts are completely
independent. Using separate ClassLoaders should do the trick.
I wonder if there's a way to solve this anyway.
{{GroovyClassLoader.removeClassCacheEntry(className)}} could also remove all
entries that start with {{"$className\$"}}. Or it could keep track of the
classes that were compiled for which root script class.
I still wonder if {{InvokerHelper.removeClass(clazz)}} should call
{{clazz.classLoader.removeClassCacheEntry(clazz.name)}}.
> OutOfMemoryError with groovy.use.classvalue=false
> -------------------------------------------------
>
> Key: GROOVY-8189
> URL: https://issues.apache.org/jira/browse/GROOVY-8189
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.11
> Reporter: Jochen Kemnade
>
> The following script causes an OOME.
> {code}
> def classLoader = new groovy.lang.GroovyClassLoader()
> while(true){
> def clazz = classLoader.parseClass(' ')
> org.codehaus.groovy.runtime.InvokerHelper.removeClass(clazz)
> }
> {code}
> If I run the script with {{-Dgroovy.use.classvalue}}, the OOME does not occur.
> The heap dump shows a lot of {{HashMap}} entries, most of them related to
> {{GroovyClassLoader}}'s {{classCache}}.
> {noformat}
> this - value: java.util.HashMap$Node[] #361
> <- table - class: java.util.HashMap, value: java.util.HashMap$Node[] #361
> <- permsMap - class: java.security.Permissions, value:
> java.util.HashMap #858
> <- permissions - class: java.security.ProtectionDomain, value:
> java.security.Permissions #103
> <- value - class: java.util.HashMap$Node, value:
> java.security.ProtectionDomain #231
> <- [8] - class: java.util.HashMap$Node[], value:
> java.util.HashMap$Node #751
> <- table - class: java.util.HashMap, value:
> java.util.HashMap$Node[] #362
> <- pdcache - class: groovy.lang.GroovyClassLoader$InnerLoader,
> value: java.util.HashMap #854
> <- <classLoader> - class: script149484505219332, value:
> groovy.lang.GroovyClassLoader$InnerLoader #100
> <- value - class: java.util.HashMap$Node, value:
> script149484505219332 class script149484505219332
> <- [2709] - class: java.util.HashMap$Node[], value:
> java.util.HashMap$Node #753
> <- table - class: java.util.HashMap, value:
> java.util.HashMap$Node[] #11647
> <- classCache (Java frame) - class:
> groovy.lang.GroovyClassLoader, value: java.util.HashMap #5463
> {noformat}
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