We are currently on OJB RC6 and cannot move to OJB 1.0 at this time due to product
release schedules. During multi-user/load testing, we occasionally see the following
ClassCastException occurring:
Caused by: java.lang.ClassCastException
at
org.apache.ojb.broker.core.QueryReferenceBroker$PBCollectionProxyListener.addThisListenerTo(QueryReferenceBroker.java:835)
at
org.apache.ojb.broker.core.QueryReferenceBroker$PBPrefetchingListener.<init>(QueryReferenceBroker.java:757)
at
org.apache.ojb.broker.core.QueryReferenceBroker$PBCollectionProxyListener.<init>(QueryReferenceBroker.java:828)
at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveCollection(QueryReferenceBroker.java:510)
at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveCollections(QueryReferenceBroker.java:656)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getDBObject(PersistenceBrokerImpl.java:1291)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.doGetObjectByIdentity(PersistenceBrokerImpl.java:1371)
at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReference(QueryReferenceBroker.java:309)
at
org.apache.ojb.broker.core.QueryReferenceBroker.retrieveReferences(QueryReferenceBroker.java:361)
at
org.apache.ojb.broker.accesslayer.RsIterator.getObjectFromResultSet(RsIterator.java:472)
>From past postings, it appears that this could eliminated by setting
>proxy-prefetching-limit to 0. Could someone confirm if this is a correct resolution
>for these errors and also give me an idea of how this may impact our current
>performance?
Thanks in advance,
Paul
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