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From "Yang Jiandan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8605) TestReflectionUtils.testCacheDoesntLeak() can't illustrate ReflectionUtils don't generate memory leak
Date Wed, 18 Jul 2012 03:45:34 GMT
Yang Jiandan created HADOOP-8605:
------------------------------------

             Summary: TestReflectionUtils.testCacheDoesntLeak() can't illustrate ReflectionUtils
don't generate memory leak
                 Key: HADOOP-8605
                 URL: https://issues.apache.org/jira/browse/HADOOP-8605
             Project: Hadoop Common
          Issue Type: Bug
          Components: test
    Affects Versions: 1.0.3
            Reporter: Yang Jiandan


TestReflectionUtils.testCacheDoesntLeak() uses different urlClassLoader to load TestReflectionUtils$LoadedInChild
by a for cycle:
    int iterations=9999; // very fast, but a bit less reliable - bigger numbers force GC
    for (int i=0; i<iterations; i++) {
      URLClassLoader loader = new URLClassLoader(new URL[0], getClass().getClassLoader());
      Class cl = Class.forName("org.apache.hadoop.util.TestReflectionUtils$LoadedInChild",
false, loader);
      Object o = ReflectionUtils.newInstance(cl, null);
      assertEquals(cl, o.getClass());
    }
but every time it generate the same class


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