[OPENJPA-1810] ClassCastException when using QueryCache and Criteria API

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1, 2.1.0
• Fix Version/s: 2.1.0
• Component/s: datacache
• Assignee: Fay Wang
• Reporter: Richard G. Curtis
• Created: 21/Sep/10 16:41
• Updated: 08/Dec/10 17:00
• Resolved: 04/Nov/10 21:06

Description

I found a ClassCastException when using the COUNT function, the criteria API, and the QueryCache is enabled. I'll post a simple unit test shortly.

<openjpa-2.1.0-SNAPSHOT-r422266:984243 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: Failed to execute query "null". Check the query syntax for correctness. See nested exception for details.
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:870)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:792)
at org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:542)
at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:288)
at org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:302)
at org.apache.openjpa.persistence.QueryImpl.getSingleResult(QueryImpl.java:326)
at org.apache.openjpa.persistence.criteria.TestCriteria.testCount(TestCriteria.java:267)
....
Caused by: java.lang.ClassCastException: org.apache.openjpa.util.IntId incompatible with [Ljava.lang.Object;
at org.apache.openjpa.datacache.QueryCacheStoreQuery$CachedList.get(QueryCacheStoreQuery.java:509)
at org.apache.openjpa.lib.rop.ListResultObjectProvider.getResultObject(ListResultObjectProvider.java:55)
at org.apache.openjpa.kernel.QueryImpl$PackingResultObjectProvider.getResultObject(QueryImpl.java:2073)
at org.apache.openjpa.kernel.QueryImpl.singleResult(QueryImpl.java:1325)
at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1237)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:1005)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:861)
... 28 more