Whatever operations are performed on our side that switches the
classloader should switch it back.
The analysis below doesn't really help us identify where this is
happening, but Herve can probably take a look. It might be in the task
code, or in Maven itself.
On 7-Apr-08, at 11:22 PM, Thomas Tardy wrote:
Hello,
I'm struggeling with some problems using the Maven ant tasks in the CI
environment with IBM Jazz. There are some ant tasks for IBM Jazz which
are handling the connection between the build engine and the Jazz
server. These Jazz ant tasks are working well as long as I haven't
used the Maven ant task in the build script. One of the Jazz guys
analyzed the problem as follows:
[quote]
I was able to get some understanding of this problem. Maven is
switching out the context class loader on the main Ant thread when
their task is invoked. Before the Maven task runs when everything
works properly...the main ant thread has a class loader of...
classLoader Launcher$AppClassLoader (id=113)
[EMAIL PROTECTED]
After the Maven task runs the class loader is now...
classLoader RealmClassLoader (id=166)
[EMAIL PROTECTED]
EMF can no longer find the appropriate factory as it delegates to the
class loader to find the EMF package. The NPE is then thrown as it
attempts to use the null factory to get the item type in
WebServicesSAXXHandler while marshalling the request to the server. I
hacked into our task a trap of the class loader before the Maven call
and then set it back the next time our task executed. Everything
worked fine again. It seems ridiculous that Maven is switching the
class loader for the main ant thread when their task executes...at the
very least if this insanity is necessary they should be switching it
back.
It appears you can work around this problem by making your pom call
into Maven before you call any of our ant tasks. We then appear to
get initially loaded into their class loader correctly and everything
works ok.
[/quote]
Why is the Maven ant task switching the class loader for the main ant
thread? Is this a bug or works as designed?
Thanks for your feedback!
Regards,
Thomas
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Thanks,
Jason
----------------------------------------------------------
Jason van Zyl
Founder, Apache Maven
jason at sonatype dot com
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In short, man creates for himself a new religion of a rational
and technical order to justify his work and to be justified in it.
-- Jacques Ellul, The Technological Society
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