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https://issues.apache.org/jira/browse/GROOVY-4177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Wagenleitner resolved GROOVY-4177.
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Resolution: Fixed
Assignee: John Wagenleitner
Fix Version/s: 1.8.0
> Groovy categories cause tomcat memory leak and prevent tomcat shutting down
> ---------------------------------------------------------------------------
>
> Key: GROOVY-4177
> URL: https://issues.apache.org/jira/browse/GROOVY-4177
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 1.7.2
> Reporter: Graeme Rocher
> Assignee: John Wagenleitner
> Priority: Critical
> Fix For: 1.8.0
>
>
> Any Groovy application (including Grails apps) that deploy to Tomcat 6.0.26
> and above has this issue because basically Tomcat clears thread locals not
> manually shutdown by the application to prevent memory leaks.
> This can lead to problems starting and stopping Groovy based application with
> errors like the following occuring:
> {code}
> [java] Exception in thread "Thread-3" java.lang.NullPointerException
> [java] at
> org.codehaus.groovy.runtime.GroovyCategorySupport.hasCategoryInCurrentThread(GroovyCategorySupport.java:216)
> [java] at
> groovy.lang.MetaClassImpl.getMethodWithCaching(MetaClassImpl.java:1128)
> [java] at
> groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:904)
> [java] at
> groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:915)
> [java] at
> groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:886)
> [java] at groovy.lang.Closure.call(Closure.java:276)
> [java] at groovy.lang.Closure.call(Closure.java:271)
> [java] at groovy.lang.Closure.run(Closure.java:354)
> {code}
> Groovy needs to include the ability to manually shutdown the any categories
> that exist in any threads and also re-instate the categories if they are
> nulled (like what happens with Tomcat)
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