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From "Pavel Pervov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-2644) [drlvm][kernel natives] bootclasspath's class loading failure produces wrong throwable
Date Fri, 29 Dec 2006 12:47:24 GMT
    [ http://issues.apache.org/jira/browse/HARMONY-2644?page=comments#action_12461369 ] 
Pavel Pervov commented on HARMONY-2644:

Ofter thinking a bit I can come out with the rationale for throwing NoClassDefFoundError instead
of ClassNotFoundException: every attempt to load class through VM (either resolution, or array
construction, or loading ancestor classes - super class and super interfaces) should produce
NoClassDefFoundError if bytes for a class was not found. Otherwise, ClassNotFoundException
is thrown.

> [drlvm][kernel natives] bootclasspath's class loading failure produces wrong throwable
> --------------------------------------------------------------------------------------
>                 Key: HARMONY-2644
>                 URL: http://issues.apache.org/jira/browse/HARMONY-2644
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Vladimir Beliaev
>            Priority: Minor
>         Attachments: Test.java
> DRLVM throws ClassNotFoundException instead of NoClassDefFoundError if it fails to load
class from bootclasspath.
> I did not find the exact place in specification saying it is wrong behavior, still 
> 1. JVMS operates with NoClassDefFoundError only in case the loading process failed. 
> 2. both Sun & JRockit java throws NoClassDefFoundError from the test below.
> To reproduce the issue, please do the following:
> a) compile attached Test.java (this produces Test.class, SubClass.class and SuperClass.class)
> b) remove SuperClass.class 
> c) run test with SubClass in bootclasspath, e.g.
>     $ ls -1 *.class
>     Test.class SubClass.class
>     $ java -Xbootclasspath/a:. Test
> The output on Reference Implementation:
>     PASSED: got NoClassDefFoundError...
>     Note: run Test with SubClass in bootclasspath...
> The output on Harmony DRLVM (with -showversion key):
>     Apache Harmony Launcher : (c) Copyright 1991, 2006 The Apache Software Foundation
or its licensors, as applicable.
>     java version "1.5.0" 
>     pre-alpha : not complete or compatible
>     svn = r486063, (Dec 12 2006), Windows/ia32/msvc 1310, debug build
>     http://incubator.apache.org/harmony
>     FAILED: got ClassNotFoundException...
> Thanks
> Vladimir

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