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https://issues.apache.org/jira/browse/HADOOP-11771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HADOOP-11771:
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Attachment: configuration-sync-cache.png
configuration-cache-bt.png
> Configuration::getClassByNameOrNull synchronizes on a static object
> -------------------------------------------------------------------
>
> Key: HADOOP-11771
> URL: https://issues.apache.org/jira/browse/HADOOP-11771
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: conf, io, ipc
> Reporter: Gopal V
> Attachments: configuration-cache-bt.png, configuration-sync-cache.png
>
>
> {code}
> private static final Map<ClassLoader, Map<String, WeakReference<Class<?>>>>
> CACHE_CLASSES = new WeakHashMap<ClassLoader, Map<String,
> WeakReference<Class<?>>>>();
> ...
> synchronized (CACHE_CLASSES) {
> map = CACHE_CLASSES.get(classLoader);
> if (map == null) {
> map = Collections.synchronizedMap(
> new WeakHashMap<String, WeakReference<Class<?>>>());
> CACHE_CLASSES.put(classLoader, map);
> }
> }
> {code}
> !configuration-sync-cache.png!
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