[icedtea-web[ broken elluminate on head

Andrew Azores aazores at redhat.com
Mon Dec 16 10:36:08 PST 2013

On 12/16/2013 09:53 AM, Andrew Azores wrote:
> On 12/16/2013 08:14 AM, Jiri Vanek wrote:
>> Afaik eluminate was  broken on head by
>> http://icedtea.classpath.org/hg/icedtea-web/rev/744442d54cbf
>> (changeset:   811:744442d54cbf
>> user:        Andrew Azores <aazores at redhat.com>
>> date:        Wed Oct 16 13:13:19 2013 -0400
>> summary:     Resolve multiple-applet deadlock issue in JNLPClassLoade)
>> Andrew, may you recheck?
>> http://icedtea.classpath.org/wiki/IcedTea-Web-Tests#javaws
>> J.
> Hmm, yes, seems to be having problems for me as well. Elluminate hangs 
> while loading some extra asserts. Backing out that changeset does seem 
> to resolve it. I'll look into what's happening here.
> Thanks,

I'm trying to investigate deeper to confirm that this is actually a good 
fix, but...

Remember back in the discussion thread for RH976833 (the bug that my 
commit was targeted to fix), when I originally had that ugly, scary 
patch? The one that wraps a bunch of the classloader's Collection fields 
in Collections.synchronized* calls, and then added synchronized blocks 
for them all over the place? Well, I went and changed the fix to use 
that rather than the new "loadClassLock" Object solution that we finally 
settled on - and the ugly, scary patch did the trick. Elluminate works 
again, and the existing JNLPClassLoaderDeadlock reproducer still passes 
(and so does the real-world test page that I modelled it after).

So as I said, I'll look into this deeper, because I haven't actually 
managed to look at the state of the classloader when Elluminate appears 
to deadlock, I just tried the other patch on a hunch. The old patch 
didn't apply cleanly so I had to port it over, which will take more work 
to make sure nothing important has changed in the meantime as well. But, 
it should end up being more or less identical. I guess in the meantime, 
find that RH976833 thread again and brush up on the contents of the 
patch I'm talking about, because I think I might end up having to put it 
up for re-review soon.


Andrew A

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