Kathey Marsden wrote:

I am running the 10.5 maildbc test on Linux with network server and the release candidate and an updated derbyTesting.jar to have just Lily's change to change the backup user: I see in the test output early and often, this error inserting data into the table:


SQLState:   XJ215
Severity: 20000
Message: You cannot invoke other java.sql.Clob/java.sql.Blob methods after calling the free() method or afte
Clob's transaction has been committed or rolled back.
java.sql.SQLException: You cannot invoke other java.sql.Clob/java.sql.Blob methods after calling the free() m
ter the Blob/Clob's transaction has been committed or rolled back.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source) at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
       at org.apache.derby.client.am.Lob.checkValidity(Unknown Source)
       at org.apache.derby.client.am.Clob.length(Unknown Source)
at org.apache.derby.client.net.NetStatementRequest.computeProtocolTypesAndLengths(Unknown Source) at org.apache.derby.client.net.NetStatementRequest.buildSQLDTAcommandData(Unknown Source) at org.apache.derby.client.net.NetStatementRequest.writeExecute(Unknown Source) at org.apache.derby.client.net.NetPreparedStatement.writeExecute_(Unknown Source) at org.apache.derby.client.am.PreparedStatement.writeExecute(Unknown Source) at org.apache.derby.client.am.PreparedStatement.flowExecute(Unknown Source) at org.apache.derby.client.am.PreparedStatement.executeUpdateX(Unknown Source) at org.apache.derby.client.am.PreparedStatement.executeUpdate(Unknown Source) at org.apache.derbyTesting.system.mailjdbc.utils.DbTasks.insertMail(DbTasks.java:447) at org.apache.derbyTesting.system.mailjdbc.tasks.Refresh.insertMail(Refresh.java:99) at org.apache.derbyTesting.system.mailjdbc.tasks.Refresh.doWork(Refresh.java:75) at org.apache.derbyTesting.system.mailjdbc.tasks.Refresh.run(Refresh.java:51) Caused by: org.apache.derby.client.am.SqlException: You cannot invoke other java.sql.Clob/java.sql.Blob metho lling the free() method or after the Blob/Clob's transaction has been committed or rolled back.

The interesting thing is that the test itself is not using any Clob methods it uses setCharacterStream and also autocommit is off.
Below is a code excerpt and
       conn.setAutoCommit(false);
           PreparedStatement insertFirst = conn.prepareStatement(
Statements.insertStr, Statement.RETURN_GENERATED_KEYS);
           String name = new String("ABCD");
           String l_name = new String("WXYZ");
           long s_insert = System.currentTimeMillis();
           for (int i = 0; i < num; i++) {
               String new_name = new String(increment(name, 60));
               String new_lname = new String(decrement(l_name, 60));
               insertFirst.setString(1, new_name);
               insertFirst.setString(2, new_lname);
               insertFirst.setTimestamp(3, new Timestamp(System
                       .currentTimeMillis()));
               name = new_name;
               l_name = new_lname;
               try {
// to create a stream of random length between 200 bytes and 3MB
                   int clobLength = Rn.nextInt(3078000 - 200 + 1) + 200;
                   streamReader = new LoopingAlphabetReader(clobLength,
                           CharAlphabet.modernLatinLowercase());
insertFirst.setCharacterStream(4, streamReader, clobLength);
               } catch (Exception e) {
MailJdbc.logAct.logMsg(LogFile.ERROR + thread_name + " : " + "File not found Exception : " + e.getMessage());
                   errorPrint(e);
                   throw e;
               }
               int rand_num = Rn.nextInt(10 - 1);
               if (i == rand_num) {
                   ResultSet rs = stmt
.executeQuery("select count(*) from REFRESH.INBOX where attach_id>0");
                   while (rs.next()) {
                       id_count = rs.getInt(1);
                       insertFirst.setInt(5, rs.getInt(1) + 1);
                   }

                   rs.close();
conn.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
               } else
                   insertFirst.setInt(5, 0);
               insertFirst
                       .setString(
                               6,
"This column is used only to by pass the space problem. If the problem still exists, then we are going to " + "have a serious issue here.*****************************************************************************************************");
               int result = insertFirst.executeUpdate();


if I connect with ij I do see some rows in the INBOX, so some inserts do seem to be happening. Does this look familiar to anyone?

Hi Kathey,

This error looks similar to DERBY-4224 [1], although in this case auto-commit is off.


--
Kristian

[1] https://issues.apache.org/jira/browse/DERBY-4224


Thanks

Kathey


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