I agree with Andy but having different release cycles we should isolate AS 7's libs from the rest anyways.

For this problem, I think we should:
 - bump up AS 7 Jackson version to the one used by Avro
 - isolate this library for future proofing

On 7 sept. 2011, at 00:06, Andrig Miller wrote:

From: "Sanne Grinovero" <sanne@hibernate.org>
To: jboss-as7-dev@lists.jboss.org
Cc: "Emmanuel Bernard" <emmanuel@hibernate.org>
Sent: Tuesday, September 6, 2011 8:44:14 AM
Subject: [jboss-as7-dev] depending on jackson-mapper-asl

Hi all,
we're working on Hibernate Search 4, which sports besides many other
changes a revamped serialization framework which uses Apache Avro;
this is an important component towards a better integration with
Infinispan and unlocking all potential of Hibernate OGM.

Avro depends on:
 org.codehaus.jackson:jackson-core-asl    (using 1.7.3)
 org.codehaus.jackson:jackson-mapper-asl    (using 1.7.3)
 com.thoughtworks.paranamer:paranamer    (using 2.3)
 org.xerial.snappy:snappy-java    (using 1.0.1-rc3)

While Hibernate Search is not part of the Application Server
distribution, we noticed that the AS depends on jackson-mapper-asl too
and some early adopters reported version conflicts.

Even forcing Search to use the same version as AS 7.0.1 (1.6.3) all
our tests are fine, but we would rather not bind our project to depend
to AS7's specific versions, if you can suggest better alternatives.
One word here.  When this thing gets into productization it is better all around if we do use the same versions.  While we can do some really cool things now through modules to have different versions of the same components floating around, I fear that we will get lazy, and before you know it we end up with dozens of versions of similar or the same components floating around, and that will become a support nightmare.

Andy

Please consider I'm not familiar with the AS7 classloader isolation
details, but since we're not living under a stone our expectation was
that application code should be isolated from this; is this something
that should be enabled, or is Jackson "special" ?

Possibly the users reporting these issues are doing something wrong? I
have no forum links as this started from IRC but I can ask for more
details if you could suggest what to look for.

Regards,
Sanne

https://hibernate.onjira.com/browse/HSEARCH-887
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