FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment-Java HotSpot(TM) Client VM
1.6.0_05-b13 -- 10.0-b19
1.6.0_02-b05 -- 1.6.0_02-b05

FULL OS VERSION :
OS Name Microsoft Windows XP Professional
Version 5.1.2600 Service Pack 2 Build 2600
OS Manufacturer Microsoft Corporation

OS Name Microsoft(R) Windows(R) Server 2003, Enterprise Edition
Version 5.2.3790 Service Pack 2 Build 3790
Other OS Description Not Available
OS Manufacturer Microsoft Corporation


EXTRA RELEVANT SYSTEM CONFIGURATION :
System Manufacturer Dell Computer Corporation
System Model Latitude D800
System Type X86-based PC
Processor x86 Family 6 Model 13 Stepping 6 GenuineIntel ~1993 Mhz
BIOS Version/Date Dell Computer Corporation A11, 9/3/2004
SMBIOS Version 2.3
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)"
User Name AMER\cstodden
Time Zone Mountain Daylight Time
  Total Physical Memory 2,048.00 MB
Available Physical Memory 1,018.61 MB
  Total Virtual Memory 2.00 GB
Available Virtual Memory 1.96 GB
Page File Space 3.35 GB
Page File C:\pagefile.sys



System Manufacturer Dell Computer Corporation
System Model PowerEdge 650
System Type X86-based PC
Processor x86 Family 15 Model 2 Stepping 7 GenuineIntel ~3066 Mhz
Processor x86 Family 15 Model 2 Stepping 7 GenuineIntel ~3066 Mhz
BIOS Version/Date Dell Computer Corporation A05, 10/14/2004
SMBIOS Version 2.3
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "5.2.3790.3959 (srv03_sp2_rtm.070216-1710)"
Time Zone Mountain Daylight Time
  Total Physical Memory 2,047.39 MB
Available Physical Memory 1.47 GB
  Total Virtual Memory 3.85 GB
Available Virtual Memory 3.27 GB
Page File Space 2.00 GB
Page File C:\pagefile.sys


A DESCRIPTION OF THE PROBLEM :
Occurs while performing compile operations and annotation processing within the Eclipse IDE plugin framework. Repetitive creation of the UrlClassLoader given a large classpath and subsequent calls to URLClassLoader.loadClass results in the following:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# java.lang.OutOfMemoryError: requested 75912 bytes for Chunk::new. Out of swap space?
#
# Internal Error (allocation.cpp:218), pid=3908, tid=3912
# Error: Chunk::new
#

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Yes

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Given the subsequent source code snippet:
1. Gather a sizeable number of jar files and place them into a know directory location.
2. Specify a few class files to be resolved by the UrlClassLoader.loadclass call.
3. Compile and run the program specify -DlibDir="path to jars"

Monitor the heap, perm, etc.
Launch Task Manager and monitor the mem usage here.



EXPECTED VERSUS ACTUAL BEHAVIOR :
I would expect that the URLClassLoader free memory when no longer referenced. Thus allowing native memory to be freed. I would expect the loadClass call to be memory bound, in other words a finite number of classes can be loaded.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Sample Program Exception:
Exception in thread "main" java.lang.OutOfMemoryError
at java.util.zip.Inflater.init(Native Method)
at java.util.zip.Inflater.<init>(Inflater.java:81)
at java.util.zip.ZipFile.getInflater(ZipFile.java:267)
at java.util.zip.ZipFile.getInputStream(ZipFile.java:212)
at java.util.zip.ZipFile.getInputStream(ZipFile.java:180)
at java.util.jar.JarFile.hasClassPathAttribute(JarFile.java:463)
at java.util.jar.JavaUtilJarAccessImpl.jarFileHasClassPathAttribute(JavaUtilJarAccessImpl.java:15)
at sun.misc.URLClassPath$JarLoader.getClassPath(URLClassPath.java:899)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:300)
at sun.misc.URLClassPath.getResource(URLClassPath.java:167)
at java.net.URLClassLoader$1.run(URLClassLoader.java:192)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at oom.OOMUrlClassPath.main(OOMUrlClassPath.java:29)

hs_pid_err.log:
#
# An unexpected error has been detected by Java Runtime Environment:
#
# java.lang.OutOfMemoryError: requested 32756 bytes for ChunkPool::allocate. Out of swap space?
#
# Internal Error (allocation.cpp:120), pid=1360, tid=3336
# Error: ChunkPool::allocate
#
# Java VM: Java HotSpot(TM) Client VM (10.0-b19 mixed mode windows-x86)
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x42dca800): JavaThread "CompilerThread0" daemon [_thread_in_native, id=3336, stack(0x43060000,0x430b0000)]

Stack: [0x43060000,0x430b0000]
[error occurred during error reporting (printing stack bounds), id 0x80000001]


Current CompileTask:
C1:596 javax.management.openmbean.CompositeDataSupport.<init>(Ljavax/management/openmbean/CompositeType;[Ljava/lang/String;[Ljava/lang/Object;)V (362 bytes)


--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
  0x4efa6400 JavaThread "RMI TCP Connection(4)-127.0.0.1" daemon [_thread_blocked, id=3212, stack(0x53220000,0x53260000)]
  0x4efa5c00 JavaThread "RMI TCP Connection(idle)" daemon [_thread_blocked, id=2424, stack(0x531e0000,0x53220000)]
  0x4eb5d400 JavaThread "RMI TCP Connection(idle)" daemon [_thread_blocked, id=3920, stack(0x531a0000,0x531e0000)]
  0x43336400 JavaThread "JMX server connection timeout 15" daemon [_thread_blocked, id=3856, stack(0x45150000,0x45190000)]
  0x42d3ac00 JavaThread "RMI Scheduler(0)" daemon [_thread_blocked, id=2664, stack(0x45110000,0x45150000)]
  0x442f3c00 JavaThread "RMI TCP Connection(1)-127.0.0.1" daemon [_thread_in_native, id=1064, stack(0x450c0000,0x45100000)]
  0x44239800 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=2012, stack(0x43370000,0x433b0000)]
  0x42dda800 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3160, stack(0x430b0000,0x430f0000)]
=>0x42dca800 JavaThread "CompilerThread0" daemon [_thread_in_native, id=3336, stack(0x43060000,0x430b0000)]
  0x42db8000 JavaThread "JDWP Command Reader" daemon [_thread_in_native, id=1468, stack(0x43020000,0x43060000)]
  0x42db6c00 JavaThread "JDWP Event Helper Thread" daemon [_thread_blocked, id=2732, stack(0x42fe0000,0x43020000)]
  0x42db4c00 JavaThread "JDWP Transport Listener: dt_socket" daemon [_thread_blocked, id=3852, stack(0x42fa0000,0x42fe0000)]
  0x42daa000 JavaThread "Attach Listener" daemon [_thread_blocked, id=3696, stack(0x42f30000,0x42f70000)]
  0x42da9000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=520, stack(0x42ef0000,0x42f30000)]
  0x42d99c00 JavaThread "Finalizer" daemon [_thread_blocked, id=3228, stack(0x42eb0000,0x42ef0000)]
  0x42d95800 JavaThread "Reference Handler" daemon [_thread_blocked, id=2348, stack(0x42e70000,0x42eb0000)]
  0x00386800 JavaThread "main" [_thread_blocked, id=3968, stack(0x003a0000,0x003e0000)]

Other Threads:
  0x42d92800 VMThread [stack: 0x42e20000,0x42e70000] [id=3112]
  0x42df4c00 WatcherThread [stack: 0x430f0000,0x43140000] [id=2364]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
 def new generation total 88512K, used 79093K [0x02950000, 0x08950000, 0x0e950000)
  eden space 78720K, 92% used [0x02950000, 0x070ab6d0, 0x07630000)
  from space 9792K, 61% used [0x07630000, 0x07c11d98, 0x07fc0000)
  to space 9792K, 0% used [0x07fc0000, 0x07fc0000, 0x08950000)
 tenured generation total 294912K, used 40917K [0x0e950000, 0x20950000, 0x32950000)
   the space 294912K, 13% used [0x0e950000, 0x11145730, 0x11145800, 0x20950000)
 compacting perm gen total 196608K, used 20233K [0x32950000, 0x3e950000, 0x42950000)
   the space 196608K, 10% used [0x32950000, 0x33d125c0, 0x33d12600, 0x3e950000)
No shared spaces configured.

Dynamic libraries:
0x00400000 - 0x00423000 D:\perf\dev\src\build\jdk6_05\bin\javaw.exe
0x7c900000 - 0x7c9b0000 C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f5000 C:\WINDOWS\system32\kernel32.dll
0x77dd0000 - 0x77e6b000 C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f02000 C:\WINDOWS\system32\RPCRT4.dll
0x77fe0000 - 0x77ff1000 C:\WINDOWS\system32\Secur32.dll
0x7e410000 - 0x7e4a0000 C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f57000 C:\WINDOWS\system32\GDI32.dll
0x7c340000 - 0x7c396000 D:\perf\dev\src\build\jdk6_05\jre\bin\msvcr71.dll
0x6d870000 - 0x6dac0000 D:\perf\dev\src\build\jdk6_05\jre\bin\client\jvm.dll
0x76b40000 - 0x76b6d000 C:\WINDOWS\system32\WINMM.dll
0x6d320000 - 0x6d328000 D:\perf\dev\src\build\jdk6_05\jre\bin\hpi.dll
0x76bf0000 - 0x76bfb000 C:\WINDOWS\system32\PSAPI.DLL
0x6d410000 - 0x6d439000 D:\perf\dev\src\build\jdk6_05\jre\bin\jdwp.dll
0x6d770000 - 0x6d776000 D:\perf\dev\src\build\jdk6_05\jre\bin\npt.dll
0x6d820000 - 0x6d82c000 D:\perf\dev\src\build\jdk6_05\jre\bin\verify.dll
0x6d3c0000 - 0x6d3df000 D:\perf\dev\src\build\jdk6_05\jre\bin\java.dll
0x6d860000 - 0x6d86f000 D:\perf\dev\src\build\jdk6_05\jre\bin\zip.dll
0x6d290000 - 0x6d297000 D:\perf\dev\src\build\jdk6_05\jre\bin\dt_socket.dll
0x71ab0000 - 0x71ac7000 C:\WINDOWS\system32\WS2_32.dll
0x77c10000 - 0x77c68000 C:\WINDOWS\system32\msvcrt.dll
0x71aa0000 - 0x71aa8000 C:\WINDOWS\system32\WS2HELP.dll
0x71a50000 - 0x71a8f000 C:\WINDOWS\System32\mswsock.dll
0x76f20000 - 0x76f47000 C:\WINDOWS\system32\DNSAPI.dll
0x76d60000 - 0x76d79000 C:\WINDOWS\system32\iphlpapi.dll
0x76fb0000 - 0x76fb8000 C:\WINDOWS\System32\winrnr.dll
0x76f60000 - 0x76f8c000 C:\WINDOWS\system32\WLDAP32.dll
0x751d0000 - 0x751ee000 C:\WINDOWS\system32\wshbth.dll
0x77920000 - 0x77a13000 C:\WINDOWS\system32\SETUPAPI.dll
0x76fc0000 - 0x76fc6000 C:\WINDOWS\system32\rasadhlp.dll
0x662b0000 - 0x66308000 C:\WINDOWS\system32\hnetcfg.dll
0x71a90000 - 0x71a98000 C:\WINDOWS\System32\wshtcpip.dll
0x6d360000 - 0x6d37a000 D:\perf\dev\src\build\jdk6_05\jre\bin\instrument.dll
0x6d620000 - 0x6d633000 D:\perf\dev\src\build\jdk6_05\jre\bin\net.dll
0x6d570000 - 0x6d579000 D:\perf\dev\src\build\jdk6_05\jre\bin\management.dll
0x43340000 - 0x43368000 C:\WINDOWS\system32\rsaenh.dll
0x769c0000 - 0x76a73000 C:\WINDOWS\system32\USERENV.dll
0x5b860000 - 0x5b8b4000 C:\WINDOWS\system32\netapi32.dll
0x6d7c0000 - 0x6d7c6000 D:\perf\dev\src\build\jdk6_05\jre\bin\rmi.dll

VM Arguments:
jvm_args: -ea -Xms384m -Xmx768m -XX:MaxPermSize=256m -XX:PermSize=192m -XX:NewRatio=3 -Xss256k -DprodMode=dev -Dsun.lang.ClassLoader.allowArraySyntax=true -Dosgi.install.area=D:\perf\src_16005jr\bea\tools\eclipse_pkgs\2.0\eclipse_3.3.1\eclipse-test -Dweblogic.home=D:/perf/src_16005jr/bea/buildout/workshopTestServers/wlserver_10.0 -DWEBLOGIC_HOME_10.0=D:\perf\src_16005jr\bea\buildout/workshopTestServers/wlserver_10.0 -DWEBLOGIC_HOME_10.3=D:\perf\src_16005jr\bea\wlserver_10.3 -DWEBLOGIC_HOME_9.2=D:\perf\src_16005jr\bea\buildout/workshopTestServers/weblogic92 -agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:1069
java_command: oom.OOMUrlClassPath
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=D:\wlw\external\jdk1.5.0_11
CLASSPATH=.;C:\tools\Java\jre1.5.0_07\lib\ext\QTJava.zip
PATH=D:\perf\dev\src\build\jdk6_05\jre\bin;C:\Python22\.;D:\Perl\bin\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\ATI Technologies\ATI Control Panel;C:\Program Files\Common Files\Roxio Shared\DLLShared;C:\Program Files\Perforce;C:\Program Files\Subversion\bin;D:\wlw\external\jdk1.5.0_11\bin;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\cygwin\bin;C:\chris\dosCommand;C:\Program Files\Mercury Interactive\LoadRunner\bin;D:\wlw\external\apache-ant-1.6.2\bin;C:\Program Files\psTools;D:\Oracle\product\10.1.0\Client_1;C:\Program Files\Common Files\Microsoft Shared\MSInfo;C:\Program Files\jprofiler3\bin\windows;C:\Program Files\QuickTime\QTSystem\;D:\perf\Fornax\JGearEclipse\eclipse\optimizeit-agent\bin;c:\vslick\win
USERNAME=cstodden
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 6 Model 13 Stepping 6, GenuineIntel



--------------- S Y S T E M ---------------

OS: Windows XP Build 2600 Service Pack 2

CPU:total 1 (1 cores per cpu, 1 threads per core) family 6 model 13 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2

Memory: 4k page, physical 2096360k(70472k free), swap 3514752k(856088k free)

vm_info: Java HotSpot(TM) Client VM (10.0-b19) for windows-x86 JRE (1.6.0_05-b13), built on Feb 22 2008 01:16:53 by "java_re" with MS VC++ 7.1

time: Wed May 14 18:49:25 2008
elapsed time: 103 seconds



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package oom;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;

import sun.misc.Resource;
import sun.misc.URLClassPath;

public class OOMUrlClassPath {

/**
* @param args
*/
public static void main(String[] args) {

ArrayList<URL> list = projLibs();

for (int j = 0; j < 10000; j++) {
URLClassLoader urlClassLoader = new URLClassLoader(list.toArray(new URL[list.size()]));
for (int i = 0; i < 1000; i++) {
int mod = i % 3;
try {
if (mod == 0) {
urlClassLoader.loadClass("com.sun.org.apache.xalan.internal.extensions.ExpressionContext");
} else if (mod == 1) {
urlClassLoader.loadClass("com.bea.control.ServiceControlChecker");
}
urlClassLoader.loadClass("com.bea.control.ServiceControl");
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}

}

}
/**
* Specify the absolute path to the lib directory ie: D:\\perf\\Electra\\electraDevWorkspace\\OOMProject\\lib
* @return
*/
public static ArrayList projLibs() {
String libDir = System.getProperty("libDir");
File classpathJarDir = new File(libDir);
ArrayList<URL> list = new ArrayList<URL>();
for (File jarFile : classpathJarDir.listFiles()) {
try {
list.add(jarFile.toURL());
} catch (MalformedURLException e) {
e.printStackTrace();
}
}

return list;
}

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
None found