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  1. JDK
  2. JDK-8058547

Memory leak in ProtectionDomain cache

    Details

    • Subcomponent:
    • Resolved In Build:
      b37
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Fix failed

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.7.0_04"
        Java(TM) SE Runtime Environment (build 1.7.0_04-b20)
        Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode)


        ADDITIONAL OS VERSION INFORMATION :
        Linux 2.6.35.14-106.fc14.x86_64 #1 SMP Wed Nov 23 13:07:52 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux


        A DESCRIPTION OF THE PROBLEM :
        This memory leak is caused by the incorrect use of a WeakHashMap stored in the field sun.security.provider.PolicyFile$PolicyInfo.pdMapping. This WeakHashMap is used as an internal cache. The problem is that under certain circumstances there can be a strong reference chain from a value of a map entry to the associated key. This strong reference chain keeps this entry reachable forever.

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        * Compile the four classes attached to this ticket.
        * In the current directory, move the class AppManager into a subdirectory 'manager'.
        * In the current directory, move the class App into a subdirectory 'app'.
        * In the current directory, move the classes SomePermission and PerAppLibrary into a subdirectory 'per-app-lib'.
        * Copy the attached file 'system.policy' to the current directory.
        * Adapt the absolute code source paths in system.policy so that they point to the directories 'manager', 'app' and 'per-app-lib'.
        * In the current directory: 'java -cp manager -Djava.security.policy=system.policy AppManager'
        * After waiting for a while, you will see an 'OutOfMemoryError'.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        The free memory values that are printed to the console should remain stable.
        ACTUAL -
        The free memory values that are printed to the console decrease, eventually resulting in an OutOfMemoryError.

        ERROR MESSAGES/STACK TRACES THAT OCCUR :

        Running app in java.net.URLClassLoader@60ec2ea8
        Free memory: 53MB
        Running app in java.net.URLClassLoader@5bf825cc
        Free memory: 49MB
        Running app in java.net.URLClassLoader@6094cbe2
        Free memory: 45MB
        Running app in java.net.URLClassLoader@1d8806f7
        Free memory: 41MB
        Running app in java.net.URLClassLoader@5e34d46a
        Free memory: 37MB
        Running app in java.net.URLClassLoader@576f8789
        Free memory: 33MB
        Running app in java.net.URLClassLoader@2b54ae5a
        Free memory: 29MB
        Running app in java.net.URLClassLoader@48129552
        Free memory: 25MB
        Running app in java.net.URLClassLoader@40128cad
        Free memory: 21MB
        Running app in java.net.URLClassLoader@7e6bc5aa
        Free memory: 17MB
        Running app in java.net.URLClassLoader@2994363b
        Free memory: 13MB
        Running app in java.net.URLClassLoader@7ffe9999
        Free memory: 9MB
        Running app in java.net.URLClassLoader@76a14c53
        Free memory: 5MB
        Running app in java.net.URLClassLoader@54b749a5
        Free memory: 36MB
        Running app in java.net.URLClassLoader@10c042ab
        Free memory: 32MB
        Running app in java.net.URLClassLoader@1704ebb
        Free memory: 28MB
        Running app in java.net.URLClassLoader@2073b879
        Free memory: 24MB
        Running app in java.net.URLClassLoader@1c898b41
        Free memory: 20MB
        Running app in java.net.URLClassLoader@20e1ed5b
        Free memory: 16MB
        Running app in java.net.URLClassLoader@c3b5587
        Free memory: 12MB
        Running app in java.net.URLClassLoader@29af45f4
        Free memory: 8MB
        Running app in java.net.URLClassLoader@11a40fff
        Free memory: 8MB
        Running app in java.net.URLClassLoader@21e8bf76
        Free memory: 8MB
        Running app in java.net.URLClassLoader@131b92e6
        Free memory: 8MB
        Running app in java.net.URLClassLoader@44cae5b8
        Free memory: 8MB
        Running app in java.net.URLClassLoader@5faecf45
        Free memory: 8MB
        Running app in java.net.URLClassLoader@504c2683
        Free memory: 8MB
        Running app in java.net.URLClassLoader@45e4d960
        Free memory: 8MB
        Running app in java.net.URLClassLoader@4706e02e
        Free memory: 8MB
        Running app in java.net.URLClassLoader@49deadf0
        Free memory: 8MB
        Running app in java.net.URLClassLoader@8e3cf25
        Free memory: 8MB
        Running app in java.net.URLClassLoader@1471cb25
        Free memory: 8MB
        Running app in java.net.URLClassLoader@e1641c0
        Free memory: 8MB
        Running app in java.net.URLClassLoader@38b72ce1
        Free memory: 9MB
        Running app in java.net.URLClassLoader@1817fe89
        Free memory: 9MB
        Running app in java.net.URLClassLoader@6a998c1
        Free memory: 9MB
        Running app in java.net.URLClassLoader@3b280492
        Free memory: 9MB
        Running app in java.net.URLClassLoader@5f154718
        Free memory: 9MB
        Running app in java.net.URLClassLoader@16fdf48d
        Free memory: 9MB
        Running app in java.net.URLClassLoader@2d0651eb
        Free memory: 9MB
        Running app in java.net.URLClassLoader@5cfe174
        Free memory: 9MB
        Running app in java.net.URLClassLoader@3be4d6ef
        Free memory: 9MB
        Running app in java.net.URLClassLoader@2f0f94a0
        Free memory: 9MB
        Running app in java.net.URLClassLoader@10c1c428
        Free memory: 9MB
        Running app in java.net.URLClassLoader@634e3372
        Free memory: 5MB
        Running app in java.net.URLClassLoader@3d949a87
        Free memory: 5MB
        Running app in java.net.URLClassLoader@183d1102
        Free memory: 5MB
        Running app in java.net.URLClassLoader@6f77e5d4
        Free memory: 5MB
        Running app in java.net.URLClassLoader@16a7bdcd
        Free memory: 5MB
        Running app in java.net.URLClassLoader@15dcc3ca
        Free memory: 5MB
        Running app in java.net.URLClassLoader@275cea3
        Free memory: 5MB
        Running app in java.net.URLClassLoader@3c626028
        Free memory: 5MB
        Running app in java.net.URLClassLoader@7bc2f501
        Free memory: 5MB
        Running app in java.net.URLClassLoader@79f5910e
        Free memory: 5MB
        Running app in java.net.URLClassLoader@6c10a234
        Free memory: 6MB
        Running app in java.net.URLClassLoader@3ddb8962
        Free memory: 6MB
        Running app in java.net.URLClassLoader@124ef122
        Free memory: 6MB
        Running app in java.net.URLClassLoader@1ca53e68
        Free memory: 6MB
        Running app in java.net.URLClassLoader@15e1df6e
        Free memory: 6MB
        Running app in java.net.URLClassLoader@4a6a00ca
        Free memory: 6MB
        Running app in java.net.URLClassLoader@526a4268
        Free memory: 6MB
        Running app in java.net.URLClassLoader@10be6858
        Free memory: 6MB
        Running app in java.net.URLClassLoader@7de534cb
        Free memory: 6MB
        Running app in java.net.URLClassLoader@2be44538
        Free memory: 6MB
        Running app in java.net.URLClassLoader@76c27ba
        Free memory: 6MB
        Running app in java.net.URLClassLoader@5c3eeab3
        Free memory: 6MB
        Running app in java.net.URLClassLoader@f6b7e0e
        Free memory: 6MB
        Running app in java.net.URLClassLoader@15136019
        Free memory: 6MB
        Running app in java.net.URLClassLoader@3ec2ccac
        Free memory: 6MB
        Running app in java.net.URLClassLoader@6a754384
        Free memory: 6MB
        Running app in java.net.URLClassLoader@1ab2f2d6
        Free memory: 6MB
        Running app in java.net.URLClassLoader@4eafccbe
        Free memory: 6MB
        Running app in java.net.URLClassLoader@7000bcbc
        Free memory: 6MB
        Running app in java.net.URLClassLoader@d6132c4
        Free memory: 7MB
        Running app in java.net.URLClassLoader@3918d722
        Free memory: 7MB
        Running app in java.net.URLClassLoader@490eb6ae
        Free memory: 7MB
        Running app in java.net.URLClassLoader@5f2e712f
        Free memory: 7MB
        Running app in java.net.URLClassLoader@6a3449a8
        Free memory: 7MB
        Running app in java.net.URLClassLoader@7d206f0
        Free memory: 7MB
        Running app in java.net.URLClassLoader@7ea06d25
        Free memory: 7MB
        Running app in java.net.URLClassLoader@2d11f5f1
        Free memory: 7MB
        Running app in java.net.URLClassLoader@203b4f0e
        Free memory: 7MB
        Running app in java.net.URLClassLoader@120773a1
        Free memory: 7MB
        Running app in java.net.URLClassLoader@7a4014a0
        Free memory: 7MB
        Running app in java.net.URLClassLoader@4e5ced83
        Free memory: 7MB
        Running app in java.net.URLClassLoader@3c818737
        Free memory: 68MB
        Running app in java.net.URLClassLoader@1a08777c
        Free memory: 64MB
        Running app in java.net.URLClassLoader@3e2f1b1a
        Free memory: 60MB
        Running app in java.net.URLClassLoader@c39a867
        Free memory: 56MB
        Running app in java.net.URLClassLoader@6e905272
        Free memory: 52MB
        Running app in java.net.URLClassLoader@1d209d56
        Free memory: 48MB
        Running app in java.net.URLClassLoader@6cd737e3
        Free memory: 44MB
        Running app in java.net.URLClassLoader@17feafba
        Free memory: 40MB
        Running app in java.net.URLClassLoader@63c5d81c
        Free memory: 36MB
        Running app in java.net.URLClassLoader@6facdcb9
        Free memory: 32MB
        Running app in java.net.URLClassLoader@6c3b0b1e
        Free memory: 28MB
        Running app in java.net.URLClassLoader@705063a5
        Free memory: 24MB
        Running app in java.net.URLClassLoader@7b6b340a
        Free memory: 20MB
        Running app in java.net.URLClassLoader@75ecda50
        Free memory: 16MB
        Running app in java.net.URLClassLoader@431d00cf
        Free memory: 12MB
        Running app in java.net.URLClassLoader@5fd1358f
        Free memory: 8MB
        Running app in java.net.URLClassLoader@1e69dff6
        Free memory: 8MB
        Running app in java.net.URLClassLoader@759f6a57
        Free memory: 8MB
        Running app in java.net.URLClassLoader@78952527
        Free memory: 8MB
        Running app in java.net.URLClassLoader@20c92ed6
        Free memory: 8MB
        Running app in java.net.URLClassLoader@79f1d448
        Free memory: 8MB
        Running app in java.net.URLClassLoader@5371ef98
        Free memory: 8MB
        Running app in java.net.URLClassLoader@77c5b2de
        Free memory: 9MB
        Running app in java.net.URLClassLoader@2f566b7d
        Free memory: 9MB
        Running app in java.net.URLClassLoader@4679cf8c
        Free memory: 9MB
        Running app in java.net.URLClassLoader@8bfc25c
        Free memory: 9MB
        Running app in java.net.URLClassLoader@3654919e
        Free memory: 9MB
        Running app in java.net.URLClassLoader@5c3f1224
        Free memory: 9MB
        Running app in java.net.URLClassLoader@4f0ab3f2
        Free memory: 9MB
        Running app in java.net.URLClassLoader@773de2bd
        Free memory: 9MB
        Running app in java.net.URLClassLoader@1a3a2a52
        Free memory: 9MB
        Running app in java.net.URLClassLoader@a5ae1e7
        Free memory: 9MB
        Running app in java.net.URLClassLoader@74904497
        Free memory: 9MB
        Running app in java.net.URLClassLoader@22dd0f87
        Free memory: 9MB
        Running app in java.net.URLClassLoader@48899e6a
        Free memory: 9MB
        Running app in java.net.URLClassLoader@433c8540
        Free memory: 5MB
        Running app in java.net.URLClassLoader@28562791
        Free memory: 5MB
        Running app in java.net.URLClassLoader@4678f83a
        Free memory: 5MB
        Running app in java.net.URLClassLoader@3eb217d5
        Free memory: 5MB
        Running app in java.net.URLClassLoader@24748417
        Free memory: 5MB
        Running app in java.net.URLClassLoader@2830803a
        Free memory: 5MB
        Running app in java.net.URLClassLoader@57543bc5
        Free memory: 5MB
        Running app in java.net.URLClassLoader@759f31de
        Free memory: 5MB
        Running app in java.net.URLClassLoader@2f57816a
        Free memory: 6MB
        Running app in java.net.URLClassLoader@19cd1d94
        Free memory: 6MB
        Running app in java.net.URLClassLoader@326cbb2d
        Free memory: 6MB
        Running app in java.net.URLClassLoader@108543aa
        Free memory: 6MB
        Running app in java.net.URLClassLoader@39df3255
        Free memory: 6MB
        Running app in java.net.URLClassLoader@10e80317
        Free memory: 6MB
        Running app in java.net.URLClassLoader@7d0d4ade
        Free memory: 6MB
        Running app in java.net.URLClassLoader@6c4cc81c
        Free memory: 6MB
        Running app in java.net.URLClassLoader@6162c87a
        Free memory: 6MB
        Running app in java.net.URLClassLoader@2c4dd413
        Free memory: 6MB
        Running app in java.net.URLClassLoader@306f7492
        Free memory: 6MB
        Running app in java.net.URLClassLoader@770f3801
        Free memory: 6MB
        Running app in java.net.URLClassLoader@441743be
        Free memory: 6MB
        Running app in java.net.URLClassLoader@7ba65cf7
        Free memory: 6MB
        Running app in java.net.URLClassLoader@740f5f97
        Free memory: 6MB
        Running app in java.net.URLClassLoader@77be91c8
        Free memory: 6MB
        Running app in java.net.URLClassLoader@35d3694a
        Free memory: 6MB
        Running app in java.net.URLClassLoader@6326c98
        Free memory: 6MB
        Running app in java.net.URLClassLoader@99ffac2
        Free memory: 6MB
        Running app in java.net.URLClassLoader@2e9e53ed
        Free memory: 6MB
        Running app in java.net.URLClassLoader@22b1656f
        Free memory: 7MB
        Running app in java.net.URLClassLoader@4ffb06c9
        Free memory: 7MB
        Running app in java.net.URLClassLoader@32114a41
        Free memory: 7MB
        Running app in java.net.URLClassLoader@2ce62a39
        Free memory: 7MB
        Running app in java.net.URLClassLoader@2d51e135
        Free memory: 7MB
        Running app in java.net.URLClassLoader@39556aec
        Free memory: 7MB
        Running app in java.net.URLClassLoader@778a5d49
        Free memory: 7MB
        Running app in java.net.URLClassLoader@13d5e499
        Free memory: 7MB
        Running app in java.net.URLClassLoader@66a75004
        Free memory: 7MB
        Running app in java.net.URLClassLoader@6d15a113
        Free memory: 7MB
        Running app in java.net.URLClassLoader@165e6c89
        Free memory: 7MB
        Running app in java.net.URLClassLoader@4be07f4b
        Free memory: 7MB
        Running app in java.net.URLClassLoader@47b6617
        Free memory: 7MB
        Running app in java.net.URLClassLoader@78ea5d87
        Free memory: 7MB
        Running app in java.net.URLClassLoader@bab5e85
        Free memory: 7MB
        Running app in java.net.URLClassLoader@5d3f79f7
        Free memory: 7MB
        Running app in java.net.URLClassLoader@138532dc
        Free memory: 6MB
        Running app in java.net.URLClassLoader@fe9e47
        Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at AppManager.runAppInNewClassLoader(AppManager.java:50)
        at AppManager.main(AppManager.java:27)
        Caused by: java.lang.OutOfMemoryError: Java heap space
        at PerAppLibrary.<clinit>(PerAppLibrary.java:3)
        at App.run(App.java:7)
        ... 6 more


        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        public class App
        {
          public void run()
          {
            System.out.println("Running app in " + getClass().getClassLoader());
            PerAppLibrary.doSomeSomething();
          }
        }

        ***********************************************************************************

        import java.io.File;
        import java.lang.reflect.InvocationTargetException;
        import java.lang.reflect.Method;
        import java.net.MalformedURLException;
        import java.net.URL;
        import java.net.URLClassLoader;


        public class AppManager
        {

          public static final String APP_DIR = "app";
          public static final String LIB_DIR = "per-app-lib";

          public static void main(String[] args) throws MalformedURLException,
                                                        ClassNotFoundException,
                                                        InstantiationException,
                                                        IllegalAccessException,
                                                        SecurityException,
                                                        NoSuchMethodException,
                                                        IllegalArgumentException,
                                                        InvocationTargetException
          {
            System.setSecurityManager(new SecurityManager());
            while (true)
              {
                runAppInNewClassLoader();
                printFreeMemory();
              }
          }


          // Helpers

          private static void runAppInNewClassLoader() throws MalformedURLException,
                                                              ClassNotFoundException,
                                                              InstantiationException,
                                                              IllegalAccessException,
                                                              SecurityException,
                                                              NoSuchMethodException,
                                                              IllegalArgumentException,
                                                              InvocationTargetException
          {
            URL[] urls = { new File(LIB_DIR).toURI().toURL(),
                           new File(APP_DIR).toURI().toURL() };
            ClassLoader loader = new URLClassLoader(urls);
            Class<?> clazz = loader.loadClass("App");
            Object app = clazz.newInstance();
            Method run = clazz.getDeclaredMethod("run");
            run.invoke(app);
          }


          private static void printFreeMemory()
          {
            Runtime rt = Runtime.getRuntime();
            rt.gc();
            System.out.println("Free memory: " + rt.freeMemory()/ (1024 * 1024) + "MB");
          }

        }

        *********************************************************************************************************

        public class PerAppLibrary
        {
          private static int[] largeArray = new int[1024 * 1024];

          public static void doSomeSomething()
          {
            SecurityManager s = System.getSecurityManager();
            if (s != null)
              {
                s.checkPermissio


        ( This report has more than 16,000 characters and has been truncated. )

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                • Assignee:
                  mullan Sean Mullan
                  Reporter:
                  coffeys Sean Coffey
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                  Dates

                  • Created:
                    Updated:
                    Resolved:
                    Imported: