org.apache.derbyTesting.functionTests.tests.memory

Class Derby5730Test

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

org.apache.derbyTesting.junit.BaseTestCase

org.apache.derbyTesting.functionTests.tests.memory.Derby5730Test

All Implemented Interfaces:

junit.framework.Test

public class Derby5730Test
extends BaseTestCase

Regression test for DERBY-5730. Repeatedly boot and shut down a database. In between call a function in the SYSFUN schema, a different one each time. Without the fix, a reference to the currently running database instance will be leaked for each iteration, and eventually an OutOfMemoryError is raised.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.Object[][]	FUNCTIONS These are the functions in the SYSFUN schema.
private static java.lang.Integer	ONE
private static java.lang.Integer	TWO
private static java.lang.Integer	ZERO

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

DEFAULT_DB_DIR, DERBY_LOG, ERRORSTACKTRACEFILE

Constructor Summary

Constructors

Constructor and Description
Derby5730Test(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
private static void	growDatabaseFootprint(java.sql.Connection c) Perform some database operations so that the internal structures of the database instance (caches, for example) are filled, and the memory footprint of the database instance grows.
static void	main(java.lang.String[] args) Boot and repeatedly reboot a database, calling SYSFUN functions in between.
private static void	prepareFunction(java.sql.Connection c, java.lang.String name, int args) Prepare a call to a function.
static junit.framework.Test	suite()
void	testLeak() Test case for DERBY-5730.

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, runBare, 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, tearDown, toString

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

private static final java.lang.Integer ZERO

ONE

private static final java.lang.Integer ONE

TWO

private static final java.lang.Integer TWO

FUNCTIONS

private static final java.lang.Object[][] FUNCTIONS

These are the functions in the SYSFUN schema. The second value in each row tells how many arguments the function takes.

Constructor Detail

Derby5730Test

public Derby5730Test(java.lang.String name)

Method Detail

suite

public static junit.framework.Test suite()

testLeak

public void testLeak()
              throws java.io.IOException

Test case for DERBY-5730. The memory leak is only reproduced if the test case runs with capped heap size and the SYSFUN functions have not been called previously in the same JVM process. Spawn a new process to satisfy those requirements.

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Boot and repeatedly reboot a database, calling SYSFUN functions in between. Eventually runs out of memory if DERBY-5730 is not fixed. Must run with capped memory size (-Xmx16M) to expose the memory leak.

Throws:

java.lang.Exception

prepareFunction

private static void prepareFunction(java.sql.Connection c,
                                    java.lang.String name,
                                    int args)
                             throws java.sql.SQLException

Prepare a call to a function. Close the statement once it is prepared. Before the bug was fixed, preparing a call to a function in SYSFUN that hadn't been prepared in the same JVM process, would leak a reference to the current database instance.

Throws:

java.sql.SQLException

growDatabaseFootprint

private static void growDatabaseFootprint(java.sql.Connection c)
                                   throws java.sql.SQLException

Perform some database operations so that the internal structures of the database instance (caches, for example) are filled, and the memory footprint of the database instance grows. This is done to make the test case run out of memory faster.

Throws:

java.sql.SQLException