[ http://issues.apache.org/jira/browse/DERBY-388?page=all ]
Rick Hillegas updated DERBY-388:
--------------------------------
Component: SQL
Assigning to SQL component.
> Intermittent failures when executing UPDATE trigger statements
> --------------------------------------------------------------
>
> Key: DERBY-388
> URL: http://issues.apache.org/jira/browse/DERBY-388
> Project: Derby
> Type: Bug
> Components: SQL
> Versions: 10.0.2.1, 10.0.2.0, 10.1.1.0
> Reporter: A B
> Assignee: A B
> Fix For: 10.0.2.2, 10.1.2.0, 10.2.0.0, 10.1.1.1
> Attachments: derby-388_test.patch, derby-388_v3.patch, go.java
>
> If I define an UPDATE trigger and then I repeatedly perform a table update
> that fires the trigger over many rows, I occasionally see intermittent
> failures of two kinds: 1) a null pointer exception, and/or 2) a syntax error.
> The NPE stack trace is this:
> java.lang.NullPointerException
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.makeValid(GenericPreparedStatement.java:808)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.rePrepare(GenericPreparedStatement.java:229)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:342)
> at
> org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(GenericTriggerExecutor.java:166)
> at
> org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(RowTriggerExecutor.java:108)
> at
> org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(TriggerEventActivator.java:296)
> at
> org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers(UpdateResultSet.java:824)
> at
> org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResultSet.java:292)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:366)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1100)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1271)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(EmbedPreparedStatement.java:259)
> The syntax error stack trace is this:
> ERROR 42X01: Syntax error:
> org.apache.derby.iapi.db.Factory::getTriggerExecutionContext.
> at
> org.apache.derby.iapi.error.StandardException.newException(StandardException.java:311)
> at
> org.apache.derby.impl.sql.compile.MethodCallNode.resolveMethodCall(MethodCallNode.java:666)
> at
> org.apache.derby.impl.sql.compile.StaticMethodCallNode.bindExpression(StaticMethodCallNode.java:455)
> at
> org.apache.derby.impl.sql.compile.NonStaticMethodCallNode.bindExpression(NonStaticMethodCallNode.java:170)
> at
> org.apache.derby.impl.sql.compile.NonStaticMethodCallNode.bindExpression(NonStaticMethodCallNode.java:170)
> at
> org.apache.derby.impl.sql.compile.JavaToSQLValueNode.bindExpression(JavaToSQLValueNode.java:250)
> at
> org.apache.derby.impl.sql.compile.CastNode.bindExpression(CastNode.java:224)
> at
> [snip]
> org.apache.derby.impl.sql.compile.DMLStatementNode.bindExpressions(DMLStatementNode.java:247)
> at
> org.apache.derby.impl.sql.compile.UpdateNode.bind(UpdateNode.java:507)
> at
> org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:332)
> at
> org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:107)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.makeValid(GenericPreparedStatement.java:811)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.rePrepare(GenericPreparedStatement.java:229)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:342)
> at
> org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(GenericTriggerExecutor.java:166)
> at
> org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(RowTriggerExecutor.java:108)
> at
> org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(TriggerEventActivator.java:296)
> at
> org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers(UpdateResultSet.java:824)
> at
> org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResultSet.java:292)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:366)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1100)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1271)
> at
> org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(EmbedPreparedStatement.java:259)
> In both cases, it looks like the error happens when Derby decides
> (internally) to recompile the trigger-action statement in the middle of
> trigger processing--depending on the state of the underlying Statement object
> that performs the trigger action, the result will be an NPE or a syntax error.
> I'm working on writing up a simplified reproduction and will post soon...
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