Highly intermittent ClassCastException in org.apache.derby.impl.sql.execute.GenericQualifier.getOrderable

[Kathey Marsden <km...@sbcglobal.net>]

I am looking at a ClassCastException for which I have no derby.log and 
very little information (just a stack trace).  The version is 10.2.2.0 - 
(485682).  The stack trace is:

                                                    
 Initial Exception; SQLState: 'XJ001'  errorCode: '0'  Msg: 'Java 
exception: '[[Lorg.apache.derby.iapi.store.access.Qualifier; incomp
 java.lang.ClassCastException: 
[[Lorg.apache.derby.iapi.store.access.Qualifier; incompatible with 
org.apache.derby.iapi.types.DataVal
     at 
org.apache.derby.impl.sql.execute.GenericQualifier.getOrderable(Unknown 
Source)                                                
     at 
org.apache.derby.impl.sql.execute.NoPutResultSetImpl.clearOrderableCache(Unknown 
Source)                                       
     at 
org.apache.derby.impl.sql.execute.BulkTableScanResultSet.openScanController(Unknown 
Source)                                    
     at 
org.apache.derby.impl.sql.execute.TableScanResultSet.openCore(Unknown 
Source)                                                  
     at 
org.apache.derby.impl.sql.execute.BulkTableScanResultSet.openCore(Unknown 
Source)                                              
     at 
org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown 
Source)                                                 
     at 
org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown 
Source)                                                     
     at 
org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown 
Source)                                                     
     at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown 
Source)                                                              
     at org.apache.derby.impl.jdbc.EmbedStatement.executeQuery(Unknown 
Source)        

It seems even the message is truncated somewhat.  I looked at the 
failing method and the exception seems to occur at one of two 
invocations of:
    (DataValueDescriptor) (orderableGetter.invoke(activation));

Unfortunately,  this is my first time working with this particular code.

Has anyone seen this before or have any immediate ideas where to look 
for a problem.

Thanks

Kathey