Hiroshi Ikeda created HADOOP-10306:
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Summary: Unnecessary weak reference map to cache classes in
Configuration
Key: HADOOP-10306
URL: https://issues.apache.org/jira/browse/HADOOP-10306
Project: Hadoop Common
Issue Type: Bug
Reporter: Hiroshi Ikeda
Priority: Trivial
In Configuration.getClassByNameOrNull():
{code}
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}
Change "new WeaHashMap<String, ...>()" to "new HashMap<String, ...>" or
something. Otherwise, even while the class is actively used, this may drop its
class cache.
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