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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5736) NullPointerException in GenericTriggerExecutor.executeSPS() caused by OutOfMemoryError
Date Wed, 02 May 2012 10:22:50 GMT
Knut Anders Hatlen created DERBY-5736:
-----------------------------------------

             Summary: NullPointerException in GenericTriggerExecutor.executeSPS() caused by
OutOfMemoryError
                 Key: DERBY-5736
                 URL: https://issues.apache.org/jira/browse/DERBY-5736
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.9.0.0
         Environment: java version "1.7.0_02"
Java(TM) SE Runtime Environment (build 1.7.0_02-b13)
Java HotSpot(TM) Server VM (build 22.0-b10, mixed mode)

Oracle Solaris 11.1 X86
            Reporter: Knut Anders Hatlen


If I run TriggerTest with the flags -server and -Xmx150M passed to the JVM, I fairly consistently
see a NPE being thrown:

java.lang.NullPointerException
        at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(GenericTriggerExecutor.java:221)
        at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(RowTriggerExecutor.java:114)
        at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(TriggerEventActivator.java:281)
        at org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers(UpdateResultSet.java:818)
        at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResultSet.java:280)
        at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java:443)
        at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:324)
        at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1242)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1715)
        at org.apache.derby.impl.jdbc.EmbedPreparedStatement.execute(EmbedPreparedStatement.java:1370)
        at org.apache.derbyTesting.functionTests.tests.lang.TriggerTest.testBlobInTriggerTable(TriggerTest.java:880)
        at org.apache.derbyTesting.functionTests.tests.lang.TriggerTest.testBlobInTriggerTable(TriggerTest.java:779)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at junit.framework.TestCase.runTest(TestCase.java:164)
        at junit.framework.TestCase.runBare(TestCase.java:130)
        at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:113)
        at junit.framework.TestResult$1.protect(TestResult.java:106)
        at junit.framework.TestResult.runProtected(TestResult.java:124)
        at junit.framework.TestResult.run(TestResult.java:109)
        at junit.framework.TestCase.run(TestCase.java:120)
        at junit.framework.TestSuite.runTest(TestSuite.java:230)
        at junit.framework.TestSuite.run(TestSuite.java:225)
        at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
        at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
        at junit.framework.TestResult.runProtected(TestResult.java:124)
        at junit.extensions.TestSetup.run(TestSetup.java:25)
        at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
        at junit.textui.TestRunner.doRun(TestRunner.java:121)
        at junit.textui.TestRunner.start(TestRunner.java:185)
        at junit.textui.TestRunner.main(TestRunner.java:143)

In derby.log, there is an OOME right before the NPE:

java.lang.OutOfMemoryError: Java heap space
        at org.apache.derby.impl.jdbc.LOBStreamControl.updateData(LOBStreamControl.java:154)
        at org.apache.derby.impl.jdbc.LOBStreamControl.write(LOBStreamControl.java:247)
        at org.apache.derby.impl.jdbc.LOBStreamControl.<init>(LOBStreamControl.java:89)
        at org.apache.derby.impl.jdbc.EmbedBlob.<init>(EmbedBlob.java:189)
        at org.apache.derby.impl.jdbc.EmbedResultSet.getBlob(EmbedResultSet.java:4072)
        at org.apache.derby.impl.jdbc.EmbedResultSet.getObject(EmbedResultSet.java:1704)
        at org.apache.derby.exe.ac56961bb1x0137x0d04x3d17x00005ffb0f6356.e0(Unknown Source)
        at org.apache.derby.impl.services.reflect.DirectCall.invoke(ReflectGeneratedClass.java:139)
        at org.apache.derby.impl.sql.execute.RowResultSet.getNextRowCore(RowResultSet.java:148)
        at org.apache.derby.impl.sql.execute.DMLWriteResultSet.getNextRowCore(DMLWriteResultSet.java:127)
        at org.apache.derby.impl.sql.execute.InsertResultSet.open(InsertResultSet.java:507)
        at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java:443)
        at org.apache.derby.impl.sql.GenericPreparedStatement.executeSubStatement(GenericPreparedStatement.java:313)
        at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(GenericTriggerExecutor.java:176)
        at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(RowTriggerExecutor.java:114)
(...)

The code that fails with NPE, is this call to cleanupOnError() in a catch block in GenericTriggerExecutor.executeSPS():

				/* retrieve the current active SC */
				StatementContext sc = lcc.getStatementContext();
				
				/* make sure that the cleanup is on the new SC */
				if (active_sc != sc) 
				{
					sc.cleanupOnError(e);
				}

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