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Simple Memory Leak in Java
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///usr/bin/env jbang "$0" "$@" ; exit $? | |
//DEPS org.apache.commons:commons-lang3:3.12.0 | |
//JAVA_OPTIONS -XX:-UseAdaptiveSizePolicy | |
//JAVA_OPTIONS -Xms16m -Xmx16m | |
//JAVA_OPTIONS -XX:NewSize=3m -XX:MaxNewSize=3m -XX:SurvivorRatio=1 | |
//JAVA_OPTIONS -XX:MaxTenuringThreshold=5 | |
//JAVA_OPTIONS -Xlog:gc* | |
//JAVA_OPTIONS -XX:+UseSerialGC | |
//JAVA_OPTIONS -XX:+HeapDumpOnOutOfMemoryError | |
import java.util.List; | |
import java.util.LinkedList; | |
import org.apache.commons.lang3.RandomStringUtils; | |
import org.apache.commons.lang3.RandomUtils; | |
public class AnotherMemoryLeak { | |
public static void main(String... args) { | |
List<String> strings = new LinkedList<String>(); | |
int elementsToAdd = 1_000; | |
int elementsToRemove = 900; | |
while( args.length >= 0) { | |
for(int i=0; i<elementsToAdd; i++) | |
strings.add( RandomStringUtils.randomAlphanumeric( 1_000 ) ); | |
for(int i=0; i<elementsToRemove; i++) | |
if( strings.size() > 0 ) | |
strings.remove( RandomUtils.nextInt(0, strings.size()) ); | |
} | |
System.out.println( strings.size() ); | |
} | |
} |
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///usr/bin/env jbang "$0" "$@" ; exit $? | |
//DEPS org.apache.commons:commons-lang3:3.12.0 | |
//JAVA_OPTIONS -Xms2g -Xmx2g | |
//JAVA_OPTIONS -Xlog:gc* | |
//JAVA_OPTIONS -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC | |
//JAVA_OPTIONS -XX:+HeapDumpOnOutOfMemoryError | |
import java.util.List; | |
import java.util.ArrayList; | |
import org.apache.commons.lang3.RandomStringUtils; | |
public class MemoryLeak { | |
List<String> listOfGarbage = new ArrayList<String>(); | |
private void doStuff() throws Exception { | |
while(true){ | |
Thread.sleep(100); | |
listOfGarbage.add( RandomStringUtils.randomAlphanumeric( 1_000 ) ); | |
} | |
} | |
public static void main(String... args) throws Exception { | |
new MemoryLeak().doStuff(); | |
} | |
} |
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