[jira] [Commented] (WW-4266) resource reloading does not work in IBM JVM

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/WW-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13915591#comment-13915591 ] 

ASF subversion and git services commented on WW-4266:
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Commit 9c5177c961fb850b80089ef4113a17d361c23fa6 in struts's branch refs/heads/develop from [~lukaszlenart]
[ https://git-wip-us.apache.org/repos/asf?p=struts.git;h=9c5177c ]

WW-4266 Adds support for IBM JVM to reload resources


> resource reloading does not work in IBM JVM
> -------------------------------------------
>
>                 Key: WW-4266
>                 URL: https://issues.apache.org/jira/browse/WW-4266
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Core Actions
>    Affects Versions: 2.3.16
>         Environment: WAS 8.5 with IBM JVM 6
>            Reporter: Christoph Nenning
>            Priority: Trivial
>             Fix For: 2.3.17
>
>         Attachments: struts2-fix-resources-reloading-in-ibm-jvm.patch
>
>
> When resources reloading is enabled, LocalizedTextUtil uses reflection to clear a private static map of the ResourceBundle class. The member name of that map is "cacheList".
> The IBM JVM has a different impl of ResourceBundle which does not have the "cacheList" member. That causes a lot of NoSuchFieldExceptions in log and resource reloading does not work.
> To fix it the patch catches NoSuchFieldException and uses clearMap() to clear the cache of that IBM ResourceBundle (which is just called "cache").
> Notes:
> - Javadoc indicates that that IBM code is based on the Apache Harmony project
> - The type of that cache member is:
> WeakHashMap<ClassLoader, Hashtable<String, ResourceBundleSoftRef>>
> So one could argue that the patch clears too much, but IMHO that is OK as it is intended for development mode anyway.



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