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From: Jeremy Boynes <jboynes@apache.org>
Message-Id: <3CADD70C-C371-48E0-81C9-0EEE7E9A0D9E@apache.org>
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Subject: Re: xalan usage in taglibs
Date: Mon, 27 Nov 2017 07:31:12 -0800
In-Reply-To: <493466c1-8c4b-fe60-2efd-e9c9e3c9ceb9@nbmlaw.co.uk>
Cc: rmannibucau@apache.org
To: Tag Libraries Users List <taglibs-user@tomcat.apache.org>
References: <66442bd7-e0db-31ec-00d3-76dd2f660b48@nbmlaw.co.uk>
 <0874B620-1354-45D8-8468-3C73BE493FA5@apache.org>
 <786191b4-42ec-2aee-1632-8444d831c4ab@nbmlaw.co.uk>
 <6BE4CAF3-41A1-4725-8D80-AAD26BA9C554@boynes.com>
 <493466c1-8c4b-fe60-2efd-e9c9e3c9ceb9@nbmlaw.co.uk>
archived-at: Mon, 27 Nov 2017 15:31:19 -0000

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> On Nov 27, 2017, at 12:07 AM, Matthew Broadhead =
<matthew.broadhead@nbmlaw.co.uk> wrote:
>=20
> In TomEE 7.0.3 everything is fine at startup.  But if a webapp is =
reloaded I get
> java.lang.ClassCastException: org.apache.xml.dtm.ref.DTMManagerDefault =
cannot be cast to org.apache.xml.dtm.DTMManager
> and the whole container needs to be restarted which is not ideal =
during production
>=20
> Now in TomEE 7.0.4 I cannot even start without this error so I cannot =
upgrade.
>=20
> It seems like a classloader issue but taglibs is the only hardcoded =
dependency on xalan

Are you including the taglibs jars in your war when deploying to TomEE? =
You shouldn=E2=80=99t need to do that as TomEE should be providing its =
own implementation of JSTL which would mean there is a chance of =
conflict if you also include them.

=46rom a thread =
<http://mail-archives.apache.org/mod_mbox/tomee-users/201707.mbox/%3CCAJMh=
K2JCM3d1qjq4pkRsiJ6burVH-yQ=3DO5Dc2-NO0jMcQcHuiA@mail.gmail.com%3E> on =
tomee-users, it sounds like TomEE could be trying include taglibs and =
avoid including the Xalan dependency but I wouldn=E2=80=99t expect that =
to work as it actually is needed by the XML tags. The dependency is =
=E2=80=9Cprovided=E2=80=9D scope to avoid automatic transitive inclusion =
for applications that don=E2=80=99t use the XML tags (which is most). =
For container integration it should be included as an application might =
use those tags.


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