full stack trace (up until application specific stuff) is:
2007-03-22 21:34:53,287 : SEVERE : WorkThread-2/34 : Logger.log :
system exception in business method:
<4|true|0.9.7-incubating-SNAPSHOT>
org.apache.openjpa.persistence.ArgumentException: Could not locate
metadata for the class using alias "PositionLog". Registered alias
mappings: "{PositionLog=[class com.lbslogics.ims.model.PositionLog]}"
at
org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:345)
at
org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getClassMetaData(JPQLExpressionBuilder.java:164)
at
org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.resolveClassMetaData(JPQLExpressionBuilder.java:142)
at
org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:211)
at
org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:181)
at
org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateType(JPQLExpressionBuilder.java:174)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.access
$500(JPQLExpressionBuilder.java:61)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder
$ParsedJPQL.populate(JPQLExpressionBuilder.java:1668)
at
org.apache.openjpa.kernel.jpql.JPQLParser.populate(JPQLParser.java:52)
at
org.apache.openjpa.kernel.ExpressionStoreQuery.populateFromCompilation(ExpressionStoreQuery.java:145)
at
org.apache.openjpa.datacache.QueryCacheStoreQuery.populateFromCompilation(QueryCacheStoreQuery.java:237)
at
org.apache.openjpa.kernel.QueryImpl.newCompilation(QueryImpl.java:644)
at
org.apache.openjpa.kernel.QueryImpl.compilationFromCache(QueryImpl.java:625)
at
org.apache.openjpa.kernel.QueryImpl.compileForCompilation(QueryImpl.java:591)
at
org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:653)
at org.apache.openjpa.kernel.QueryImpl.compile(QueryImpl.java:560)
at
org.apache.openjpa.persistence.EntityManagerImpl.createNamedQuery(EntityManagerImpl.java:785)
at
org.apache.openjpa.persistence.EntityManagerImpl.createNamedQuery(EntityManagerImpl.java:62)
at com.lbslogics.ims.model.PositionLog.findById(PositionLog.java:175)
at
com.lbslogics.ims.persistence.ejb.EventBean.getPositionLog(EventBean.java:2875)
[ ... some more ]
The corresponding EventBean is a SLSB (EJB2.1) and the method looks like
that:
/**
*
* @return
*/
public PositionLog getPositionLog(final EntityManager em) {
final PositionLog log = PositionLog.findById(em,
getPositionLogId());
return log;
}
and the Positionlog.findById is a static method which encapsulates some
of the "technical work":
public static PositionLog findById(EntityManager em, Long plId)
{
Query q = em.createNamedQuery("PositionLog.byId");
q.setParameter("id", plId);
try {
return (PositionLog) q.getSingleResult();
} catch (javax.persistence.NoResultException e) {
logger.finest("findById: did not find result for id=" +
plId);
return null;
}
}
This method or better the top-level entry point of this method is called
several hundred times for different records, all invoked by a MDB. Could
it be some concurrency issue because after several hundred invocations
only a single exception occured?
Hans
Am Freitag, den 23.03.2007, 05:48 -0700 schrieb Patrick Linskey:
> Could you post the full stack trace, and maybe some code showing how
> you're invoking the JPA APIs?
>
> -Patrick
>
