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Subject: Re: LinkageError woes
From: Kevan Miller <kevan.miller@gmail.com>
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Date: Thu, 12 May 2011 09:00:30 -0400
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On May 10, 2011, at 11:01 PM, David Blevins wrote:

>=20
> On May 10, 2011, at 6:57 PM, David Blevins wrote:
>=20
>> I have a hunch that eagerly loading annotations *and* enums might do =
the trick.  Going to see if that is the case as that might give us more =
information about the issue and potentially a workaround that might be =
one we can stomach.  Loading all the classes eagerly is not ok, but =
eagerly loading annotation and enum classes might be livable till we can =
find the real issue.
>=20
> Looks like eagerly loading all the application's annotations and enums =
twice does the trick.  The first time fails with the LinkageError and =
the second time works.
>=20
> Currently performing some magic in debugger with evaluating =
expressions to get this accomplished.  Not going to codify it just yet, =
but if we wanted this as a hack as an implemented workaround we'd need =
to use ASM to scrape and get a list of all annotation and enum classes, =
put that data in perhaps a gbean that is setup to load on app startup =
with a dependency on the app classloader, then have that gbean do the =
double load.  The xbean-finder code doesn't currently have the ability =
to list annotations and enums -- we'd have to add it or scrape again.
>=20
> Hopefully we can find the real issue and not have to do that.

So, I swapped a bit more state back in (how quickly I forget). ClassFile =
transformation driven by OpenJPA is causing this error. I re-opened our =
original Jira. I created an Equinox bug report and they've created a =
patch, which seems to fix our problem.=20

There will be the question of how we pick up the fix within Geronimo. =
The patch is on Equinox 3.7 -- something we probably want to pick up =
anyway.

--kevan