org.apache.derbyTesting.functionTests.tests.memory

Class MemoryLeakFixesTest

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

org.apache.derbyTesting.junit.BaseTestCase

org.apache.derbyTesting.junit.BaseJDBCTestCase

org.apache.derbyTesting.functionTests.tests.memory.MemoryLeakFixesTest

All Implemented Interfaces:

junit.framework.Test

public class MemoryLeakFixesTest
extends BaseJDBCTestCase

MemoryLeakFixesTest should be run with -Xmx16M or run as part of the ant junit-lowmem target. The test is generally successful if it does not run out of memory. Results are not typically checked.

Field Summary

Fields

Modifier and Type	Field and Description
private static long	HALFMB
private static int	numPreparedStmts
private static int	numRows

Fields inherited from class org.apache.derbyTesting.junit.BaseTestCase

DEFAULT_DB_DIR, DERBY_LOG, ERRORSTACKTRACEFILE

Constructor Summary

Constructors

Constructor and Description
MemoryLeakFixesTest(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
private static void	runFinalizerIfNeeded() runFinalizerIfNeeded is called periodically for DERBY-4200.
static junit.framework.Test	suite()
void	testPrepStmtD210()
void	testReExecuteD557()
void	testRepeatedDatabaseCreationWithAutoStats() Tests that the memory usage dosen't increase for each database that is created.
void	testResultSetgcD3316() Test fix for leak if ResultSets are not closed.

Methods inherited from class org.apache.derbyTesting.junit.BaseJDBCTestCase

assertCallError, assertCheckTable, assertCompileError, assertEquals, assertEquals, assertEquals, assertEquivalentDataType, assertErrorCode, assertGetIntError, assertNextError, assertPreparedStatementError, assertSQLExceptionEquals, assertSQLState, assertSQLState, assertStatementError, assertStatementError, assertStatementError, assertStatementError, assertStatementErrorUnordered, assertTableRowCount, assertUpdateCount, assertUpdateCount, assertWarning, checkAllConsistency, checkEstimatedRowCount, closeStatement, commit, createStatement, createStatement, createStatement, dropTable, dropTable, dropView, dropView, emptyStatementCache, getClientTransactionID, getConnection, getDatabaseProperty, getLastSQLException, initializeConnection, openConnection, openDefaultConnection, openDefaultConnection, openDefaultConnection, openUserConnection, prepareCall, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, rollback, runBare, runBareOverridable, runScript, runScript, runSQLCommands, setAutoCommit, tearDown, usingDB2Client, usingDerbyNetClient, usingEmbedded

Methods inherited from class org.apache.derbyTesting.junit.BaseTestCase

alarm, assertDirectoryDeleted, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertExecJavaCmdAsExpected, assertLaunchedJUnitTestMethod, assertLaunchedJUnitTestMethod, assertSecurityManager, assertThrowableEquals, currentDirectory, execJavaCmd, execJavaCmd, fail, getClassVersionMajor, getEmmaJar, getFailureFolder, getFilesWith, getJavaExecutableName, getSystemProperty, getTestConfiguration, getTestResource, hasInterruptibleIO, isCVM, isIBMJVM, isJ9Platform, isJava5, isJava7, isJava8, isPhoneME, isPlatform, isSunJVM, isWindowsPlatform, openTestResource, println, printStackTrace, readProcessOutput, removeDirectory, removeDirectory, removeFiles, removeSystemProperty, runsWithEmma, runsWithJaCoCo, setSystemProperty, sleep, sleepAtLeastOneTick, traceit

Methods inherited from class junit.framework.TestCase

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertTrue, assertTrue, countTestCases, createResult, fail, fail, failNotEquals, failNotSame, failSame, format, getName, run, run, runTest, setName, setUp, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

HALFMB

private static long HALFMB

numRows

private static int numRows

numPreparedStmts

private static int numPreparedStmts

Constructor Detail

MemoryLeakFixesTest

public MemoryLeakFixesTest(java.lang.String name)

Method Detail

testPrepStmtD210

public void testPrepStmtD210()
                      throws java.lang.Exception

Throws:

java.lang.Exception

testReExecuteD557

public void testReExecuteD557()
                       throws java.lang.Exception

Throws:

java.lang.Exception

testResultSetgcD3316

public void testResultSetgcD3316()
                          throws java.lang.Exception

Test fix for leak if ResultSets are not closed.

Throws:

java.lang.Exception

testRepeatedDatabaseCreationWithAutoStats

public void testRepeatedDatabaseCreationWithAutoStats()
                                               throws java.sql.SQLException

Tests that the memory usage dosen't increase for each database that is created.

The tests is primarily written to ensure that the automatic index statistics daemon doesn't cause memory leakage. One one database is active/booted at a time.

See DERBY-5336.

Throws:

java.sql.SQLException - if something goes wrong

runFinalizerIfNeeded

private static void runFinalizerIfNeeded()

runFinalizerIfNeeded is called periodically for DERBY-4200. With the IBM JVM in some modes, like soft real time or in a single threaded environment on vmware. The finalizer may lag behind the program so much we get an OOM. If we get low on memory, force the finalizer to catch up.

suite

public static junit.framework.Test suite()