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https://issues.apache.org/jira/browse/AXIS2-4389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720862#action_12720862
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Greg Logan commented on AXIS2-4389:
-----------------------------------
Ok, progress. I did have a missing getter for a class property that we did not
wish to expose. This worked fine in Glassfish, which is why I expected it to
work here. Once I added the getter it no longer throws any exceptions.
Instead it seems to become stuck in a loop and never returns any data, fault or
otherwise. I added the following at line 238 in BeanUtil.java:
System.out.println(beanInfo.getBeanDescriptor().getBeanClass().getName() + " "
+ property.getName());
The output (and stack trace) now looks like:
ca.recollect.entities.transitions.Act transitionList
ca.recollect.entities.transitions.TransitionList episode
ca.recollect.entities.Episode series
ca.recollect.entities.Episode transitionList
ca.recollect.entities.Episode uuid
with the last three lines repeating. I believe this is caused by loops in our
entity classes since it appears to be recursing in the @OneToOne link between
my Episode and TransitionList classes.
Should troubleshooting this continue on inside this bug, or should I go back to
the mailing list?
> Axis2 1.5 + EclipseLink + Tomcat 6 = Exceptions, but only sometimes
> -------------------------------------------------------------------
>
> Key: AXIS2-4389
> URL: https://issues.apache.org/jira/browse/AXIS2-4389
> Project: Axis 2.0 (Axis2)
> Issue Type: Bug
> Affects Versions: 1.5
> Environment: Windows XP SP3/Ubuntu 9.04 64bit server, Tomcat 6.0.x,
> Eclipse 3.4.2, Axis 1.5
> Reporter: Greg Logan
> Priority: Blocker
> Attachments: catalina.out
>
>
> From the mailing list:
> I'm having this weird problem when I try and use certain Axis2 web
> services, but not others. What I'm trying to do is make a call, and
> have the service return data from the DB using JPA queries via
> Eclipselink. Unfortunately Axis appears to be throwing
> NullPointerExceptions for some of the calls and I have no idea why.
> I've attached the full exception text, but the top few lines are thus:
> [ERROR] java.lang.NullPointerException
> org.apache.axiom.om.OMException: java.lang.NullPointerException
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:260)
> at org.apache.axiom.om.impl.llom.OMNodeImpl.build(OMNodeImpl.java:335)
> which is generated in response to the function:
> public Act[] getAllScenes(Common common) throws Exception {
> //get the entity manager and begin a transaction
> EntityManager em = emf.createEntityManager();
> //Find the appropriate video
> Episode ep = em.find(Episode.class, common.getVideoid());
> ...
> //Get the list of acts in the video
> List<Act> results = t.getScenes();
> if (results == null) {
> logger.debug("Error: No list of acts found");
> return null;
> }
> //Sort them into the appropriate order and return
> Act[] ary = new Act[results.size()];
> results.toArray(ary);
> Arrays.sort(ary);
> em.close();
> return ary;
> }
> I've tried playing the debug-statement game, and I found that the line
> throwing the exception is sometime *after* the return statement -
> everything else is valid, including the data being pulled from the DB.
> On the flip side, I have a very similar function in a different service
> (but still the same Eclipse project, persistence unit, build script and
> deployed WAR file) which works fine for no apparent reason.
> Is there something here that I'm doing wrong, or anything that stands
> out? I've been blocked on this for a couple of days now and I would
> really like to be able to make some progress again :)
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