Additional information:

the message "executing statement after shutdown" is misleading. There was no shutdown occurring and the connection was open and valid.

Our query (which I cannot show here for now) was complex, with case statements and group by.
Interestingly, as soon as the query was reworked to remove group by clause, the code worked flawlessly.

P.


From: Pavel Bortnovskiy <PBortnovskiy@Jefferies.com>
To: Derby Discussion <derby-user@db.apache.org>
Date: 02/09/2011 10:43 AM
Subject: NullPointerException deep in Derby





Hello:

I just got the following NullPointerException, seemingly inside Derby code:


2011-02-09 10:39:13,576 ERROR DataProcessor  - SQL Exception due to executing statement after shutdown

java.sql.SQLException: The exception 'java.lang.NullPointerException' was thrown while evaluating an expression.

       at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)

       at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)

       at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)

       at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)

       at org.apache.derby.impl.jdbc.EmbedResultSet.closeOnTransactionError(Unknown Source)

       at org.apache.derby.impl.jdbc.EmbedResultSet.movePosition(Unknown Source)

       at org.apache.derby.impl.jdbc.EmbedResultSet.next(Unknown Source)

       at com.jefco.processors.DataProcessor.process(DataProcessor.java:189)

       at java.lang.Thread.run(Thread.java:619)

Caused by: java.sql.SQLException: The exception 'java.lang.NullPointerException' was thrown while evaluating an expression.

       at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)

       ... 13 more

Caused by: java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.

       at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)

       at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)

       at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)

       at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)

       ... 10 more

Caused by: java.lang.NullPointerException

       at org.apache.derby.exe.ac96c5c136x012ex0b13x5d52xffff9ccc25960.e9(Unknown Source)

       at org.apache.derby.impl.services.reflect.DirectCall.invoke(Unknown Source)

       at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.doProjection(Unknown Source)

       at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(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)

       ... 5 more




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Jefferies archives and monitors outgoing and incoming e-mail. The contents of this email, including any attachments, are confidential to the ordinary user of the email address to which it was addressed. If you are not the addressee of this email you may not copy, forward, disclose or otherwise use it or any part of it in any form whatsoever. This email may be produced at the request of regulators or in connection with civil litigation. Jefferies accepts no liability for any errors or omissions arising as a result of transmission. Use by other than intended recipients is prohibited. In the United Kingdom, Jefferies operates as Jefferies International Limited; registered in England: no. 1978621; registered office: Vintners Place, 68 Upper Thames Street, London EC4V 3BJ. Jefferies International Limited is authorised and regulated by the Financial Services Authority.