highly intermittent java.lang.ClassCastException:
[[Lorg.apache.derby.iapi.store.access.Qualifier; incompatible with
org.apache.derby.iapi.types.DataValueDescriptor doing simple select
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Key: DERBY-4264
URL: https://issues.apache.org/jira/browse/DERBY-4264
Project: Derby
Issue Type: Bug
Components: SQL
Affects Versions: 10.2.2.0
Environment: Embedded Derby 10.2.2.0 - (485682)
z/OS J2RE 1.5.0 IBM z/OS build pmz31dev-20081210 (SR9-0)
Reporter: Kathey Marsden
I got a report from a user for a highly intermittent ClassCastException doing a
select. Below is the stack trace:
java.lang.ClassCastException:
[[Lorg.apache.derby.iapi.store.access.Qualifier; incompatible
with org.apache.derby.iapi.types.DataValueDescriptor
at
org.apache.derby.impl.sql.execute.GenericQualifier.getOrderable(
Unknown Source)
at
org.apache.derby.impl.sql.execute.NoPutResultSetImpl.clearOrdera
bleCache(Unknown Source)
at
org.apache.derby.impl.sql.execute.BulkTableScanResultSet.openSca
nController(Unknown Source)
at
org.apache.derby.impl.sql.execute.TableScanResultSet.openCore(Un
known Source)
at
org.apache.derby.impl.sql.execute.BulkTableScanResultSet.openCor
e(Unknown Source)
at
org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(U
nknown Source)
at
org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unkno
wn Source)
at
org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unkno
wn Source)
at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown
Source)
at
org.apache.derby.impl.jdbc.EmbedStatement.executeQuery(Unknown
Source)
I don't have a reproduction yet but have some information on the schema and
query that occasionally fails: The data here is contrived, I don't know the
actual data in the table at the time of the failure. The column names have
changed, but represent the same types.
CREATE TABLE "APP"."RESOURCE"
(
"AUUID" CHAR(36) NOT NULL,
"BUUID" CHAR(36) NOT NULL,
"CUUID" CHAR(36) NOT NULL,
"DUUID" CHAR(36) NOT NULL,
"SECTION" CHAR(6) NOT NULL,
"TYPE" CHAR(48) NOT NULL,
"LASTUPDATE" TIMESTAMP NOT NULL
);
ALTER TABLE "APP"."RESOURCE" ADD CONSTRAINT "SQL060817095529130" PRIMARY KEY
("AUUID", "BUUID", "SECTION");
-- Not sure of the actual data. This data was made up so the query would get a
match.
INSERT INTO RESOURCE VALUES ('3b2c2edc-1401-0000-0080-c38634aef3ba',
'3b2c2edc-1401-0000-0080-c38634aef3bb', '2be1347d-2001-0000-0080-8cd524f0d034',
'2be1347d-2001-0000-0080-8cd524f0d033', 'GENRAL', 'NodeType',
CURRENT_TIMESTAMP);
SELECT * FROM RESOURCE WHERE
SECTION='GENRAL' AND
TYPE='NodeType' AND
DUUID='2be1347d-2001-0000-0080-8cd524f0d033' AND
BUUID='3b2c2edc-1401-0000-0080-c38634aef3bb';
This has happened to just one user on z/OS with J2RE 1.5.0 IBM z/OS build
pmz31dev-20081210 (SR9-0). Other users running the same application on the
same versions have not seen this issue. This particular user has disabled the
functionality causing the problem for now, so I am hoping we can glean some
information from code inspection and debugging this sample query to see where
the cast might go wrong.
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