I am just becoming familiar with Castor JDO, and I am encountering a
strange problem. If I just retrieve simple attributes of an object,
everything works as expected. However if I also retrieve related
Objects, mapped either as a one-to-many relationship or a
many-to-many relationship in the database, I get this exception:
java.sql.SQLException: Stream has already been closed
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:285)
at oracle.jdbc.ttc7.LongTTCItem.getChars(LongTTCItem.java:197)
at
oracle.jdbc.dbaccess.DBDataSetImpl.getCharsStreamItem(DBDataSetImpl.java:1188)
at
oracle.jdbc.driver.OracleStatement.getCharsInternal(OracleStatement.java:2932)
at oracle.jdbc.driver.OracleStatement.getStringValue(OracleStatement.java:3047)
at
oracle.jdbc.driver.OracleResultSetImpl.getString(OracleResultSetImpl.java:308)
at org.exolab.castor.jdo.engine.SQLTypes.getObject(SQLTypes.java:341)
at
org.exolab.castor.jdo.engine.SQLEngine$SQLQuery.loadSingleField(SQLEngine.java:1814)
at org.exolab.castor.jdo.engine.SQLEngine$SQLQuery.loadRow(SQLEngine.java:1880)
at
org.exolab.castor.jdo.engine.SQLEngine$SQLQuery.fetchRaw(SQLEngine.java:1953)
at
org.exolab.castor.jdo.engine.SQLEngine$SQLQuery.nextIdentity(SQLEngine.java:1761)
at org.exolab.castor.persist.QueryResults.nextIdentity(QueryResults.java:173)
at
org.exolab.castor.jdo.engine.OQLQueryImpl$OQLEnumeration.hasMore(OQLQueryImpl.java:638)
at
org.exolab.castor.jdo.engine.OQLQueryImpl$OQLEnumeration.hasMore(OQLQueryImpl.java:624)
I also get this exception if I try to execute a second query, while looping through
the results of my first query.
I am using Castor version 0.9.5 with Oracle.
I have done quite a bit of searching and reading to find a cause for
this, but no luck. Has anyone seen similar behavior, or have an idea of
what I might be doing wrong?
Thanks!
John
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