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From "Andreas Korneliussen (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-1058) derby fails supporting holdable scrollable resultset: ERROR XSCB8: The btree conglomerate 1,141,037,436,752 is closed.
Date Mon, 27 Feb 2006 11:07:11 GMT
derby fails supporting holdable scrollable resultset: ERROR XSCB8: The btree conglomerate 1,141,037,436,752
is closed.
----------------------------------------------------------------------------------------------------------------------

         Key: DERBY-1058
         URL: http://issues.apache.org/jira/browse/DERBY-1058
     Project: Derby
        Type: Bug
  Components: SQL, Store  
    Versions: 10.1.2.1    
 Environment: All
    Reporter: Andreas Korneliussen


If the ResultSet is so big that the scrollable resultset needs to back the hashtable to disk,
and the resultset is not fully populated before a commit(),
a call to next() will fail with:

ak136785@khepri35:/<3>db-derby-10.1.2.1-bin/lib> java -cp /home/ak136785/devel/derbytesting/derbytest/build/classes/:./derby.jar
derbytest.HoldabilityIssue
ERROR XSCB8: The btree conglomerate 1,141,037,436,752 is closed.
        at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
        at org.apache.derby.impl.store.access.btree.BTreeController.insert(Unknown Source)
        at org.apache.derby.impl.store.access.btree.index.B2IController.insert(Unknown Source)
        at org.apache.derby.iapi.store.access.DiskHashtable.put(Unknown Source)
        at org.apache.derby.iapi.store.access.BackingStoreHashtable.spillToDisk(Unknown Source)
        at org.apache.derby.iapi.store.access.BackingStoreHashtable.add_row_to_hash_table(Unknown
Source)
        at org.apache.derby.iapi.store.access.BackingStoreHashtable.put(Unknown Source)
        at org.apache.derby.impl.sql.execute.ScrollInsensitiveResultSet.addRowToHashTable(Unknown
Source)
        at org.apache.derby.impl.sql.execute.ScrollInsensitiveResultSet.getNextRowFromSource(Unknown
Source)
        at org.apache.derby.impl.sql.execute.ScrollInsensitiveResultSet.getNextRowCore(Unknown
Source)
        at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.getNextRow(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedResultSet.movePosition(Unknown Source)
        at org.apache.derby.impl.jdbc.EmbedResultSet.next(Unknown Source)
        at derbytest.HoldabilityIssue.runTest1(HoldabilityIssue.java:72)
        at derbytest.HoldabilityIssue.main(HoldabilityIssue.java:91)
ak136785@khepri35:/<3>db-derby-10.1.2.1-bin/lib>

The BtreeController is always initialized as non-holdable, and if this is changed, Derby has
the following assert in closeForEndTransaction(..):
   SanityManager.THROWASSERT("There is currently no requirement for a held btree conglomerate
controller.");

A simple test program is attached which reproduces this failure. It fails in the trunk and
on the 10.1.2.1 release


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