FULL PRODUCT VERSION :
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode, sharing)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]
Service Pack 3
EXTRA RELEVANT SYSTEM CONFIGURATION :
NIC: Broadcom NetXtreme Gigabit Ethernet
NIC: corega FEther USB-TXC
A DESCRIPTION OF THE PROBLEM :
By using NetworkInterface.getByInetAddress(), the process memory usage increases in the process view of Windows task manager.
When checking by jconsole, the increase is not JVM heap or non-heap.
When checking windows userdump of the process, 64bytes memory allocations increase.
When checking open-jdk source (openjdk-6-src-b17-14_oct_2009.tar), it seems that the allocation is '*netaddrP' in NetworkInterface_winXP.c line 440. ( I don't know if the line is executed by the above use.)
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute the attached test case.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Memory usage does not increase.
ACTUAL -
Memory usage increases.
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import java.net.InetAddress;
import java.net.NetworkInterface;
public class Test {
public static void main(String[] args) {
try {
String host = "192.168.0.1";
InetAddress address = InetAddress.getByName(host);
while (true) {
NetworkInterface.getByInetAddress(address);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
---------- END SOURCE ----------
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode, sharing)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]
Service Pack 3
EXTRA RELEVANT SYSTEM CONFIGURATION :
NIC: Broadcom NetXtreme Gigabit Ethernet
NIC: corega FEther USB-TXC
A DESCRIPTION OF THE PROBLEM :
By using NetworkInterface.getByInetAddress(), the process memory usage increases in the process view of Windows task manager.
When checking by jconsole, the increase is not JVM heap or non-heap.
When checking windows userdump of the process, 64bytes memory allocations increase.
When checking open-jdk source (openjdk-6-src-b17-14_oct_2009.tar), it seems that the allocation is '*netaddrP' in NetworkInterface_winXP.c line 440. ( I don't know if the line is executed by the above use.)
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute the attached test case.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Memory usage does not increase.
ACTUAL -
Memory usage increases.
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import java.net.InetAddress;
import java.net.NetworkInterface;
public class Test {
public static void main(String[] args) {
try {
String host = "192.168.0.1";
InetAddress address = InetAddress.getByName(host);
while (true) {
NetworkInterface.getByInetAddress(address);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
---------- END SOURCE ----------