[GROOVY-8189] OutOfMemoryError with groovy.use.classvalue=false

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4.11
• Assignee: Unassigned
• Reporter: Jochen Kemnade
• Created: 15/May/17 10:49
• Updated: 26/May/17 07:44

Description

The following script causes an OOME.

def classLoader = new groovy.lang.GroovyClassLoader()

while(true){
  def clazz = classLoader.parseClass(' ')
  org.codehaus.groovy.runtime.InvokerHelper.removeClass(clazz)
}

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.

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

Issue Links

• is related to: GROOVY-6655 GroovyClassLoader parallelLockMap memory leak on Java 7
• relates to: GROOVY-7646 Classes generated by Eval() never collected from Permgen/Metaspace
• relates to: GROOVY-7683 Memory leak when using Groovy as JSR-223 scripting language.
• relates to: GROOVY-7591 Use of ClassValue causes major memory leak