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  1. JDK
  2. JDK-8229011

Nashorn Leak (.invoke.LambdaForm, invoke.BoundMethodHandle)

    Details

    • Subcomponent:
      gc
    • Introduced In Version:
      9
    • CPU:
      x86_64
    • OS:
      generic

      Description

      ADDITIONAL SYSTEM INFORMATION :
      Tested on the latest OSX with Ubuntu Linux using
      the latest builds from https://adoptopenjdk.net/upstream.html
      8u222-b10 - no problem
      11.0.4+11 - leak
      jdk-12.0.2+10 - leak

      A DESCRIPTION OF THE PROBLEM :
      Using jdk 11 and 12 we experience a memory leak using nashorn (we know that is deprecated)

      from the heap dump we can see the number of java.lang.invoke.LambdaForm and java.lang.invoke.BoundMethodHandle$Species_LL going up each iteration.

      this does not happen by switching to jdk 8

      REGRESSION : Last worked in version 8u221

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      create an instance of the nashorn script engine and invoke a java injected class method in a loop.
      with a jdk 11 or 12 you can see that the memory keeps going up and from the heap dump you can see a lot of LambdaForm and BoundMethodHandle objects. while with jdk 8 this does not happen.

      ACTUAL -
      from the heap dump you can see the number of java.lang.invoke.LambdaForm and java.lang.invoke.BoundMethodHandle$Species_LL going up each iteration.

        Class Name | Objects | Shallow Heap
        -------------------------------------------------------------------------------------------------------
        java.lang.invoke.LambdaForm$Name | 4,857 | 155,424
        |- java.lang.Object[] | 4,375 | 124,784
        |- java.lang.invoke.LambdaForm$Name[] | 862 | 49,000
        | |- java.lang.invoke.LambdaForm | 857 | 41,136
        | | |- java.lang.invoke.BoundMethodHandle$Species_LL | 938 | 37,520
        | | | |- java.lang.invoke.BoundMethodHandle$Species_LL | 386 | 15,440
        | | | | |- java.lang.invoke.DirectMethodHandle | 314 | 10,048
        | | | | |- jdk.nashorn.internal.runtime.AccessorProperty | 165 | 9,240
        | | | | |- java.lang.invoke.LambdaForm | 40 | 1,920
        | | | | |- java.lang.Object[] | 41 | 1,880
        | | | | |- java.lang.invoke.MethodHandle[] | 28 | 896
        | | | | |- java.lang.invoke.BoundMethodHandle$Species_LLIL | 12 | 576
        | | | | |- java.lang.invoke.DirectMethodHandle$Accessor | 14 | 560
        | | | | |- jdk.nashorn.internal.runtime.Context$BuiltinSwitchPoint | 22 | 528
        | | | | |- java.lang.invoke.BoundMethodHandle$Species_LLI | 12 | 480
        | | | | |- java.lang.invoke.BoundMethodHandle$Species_LLLL | 10 | 480
        | | | | |- java.lang.invoke.SwitchPoint | 10 | 240
        | | | | |- java.lang.invoke.BoundMethodHandle$Species_LL | 4 | 160
        | | | | |- jdk.nashorn.internal.runtime.linker.InvokeByName | 4 | 96
        | | | | |- java.util.concurrent.ConcurrentHashMap$Node | 2 | 64
        | | | | |- java.lang.Class | 1 | 40
        | | | | |- jdk.nashorn.internal.runtime.ScriptFunctionData$GenericInvokers| 1 | 24
        | | | | '- Total: 16 entries | |
        | | | |- java.lang.invoke.DirectMethodHandle | 322 | 10,304
        | | | |- jdk.nashorn.internal.runtime.AccessorProperty | 168 | 9,408
        | | | |- java.lang.invoke.BoundMethodHandle$Species_LLL | 57 | 2,280
        -------------------------------------------------------------------------------------------------------


      ---------- BEGIN SOURCE ----------
      package test;

      import javax.script.ScriptEngine;
      import javax.script.ScriptEngineManager;

      public class TestJsMemLeak {
        private static final String JS_TEST_NAME = "test";
        private static final String JS_TEST_SOURCE =
            "for (var i = 0; i < 10; ++i) {\n" +
            " JsJavaUtil.testFunc();\n" +
            "}";

        public static final class JsJavaUtil {
          private long counter = 0;

          public long testFunc() {
            return counter++;
          }
        }

        public static void main(final String[] args) throws Exception {
          System.setProperty("nashorn.args", "--no-java -doe --language=es5");

          for (long i = 0; true; ++i) {
            final ScriptEngine scriptEngine = new ScriptEngineManager().getEngineByName("nashorn");
            scriptEngine.put("JsJavaUtil", new JsJavaUtil());
            scriptEngine.put("script", JS_TEST_SOURCE);
            scriptEngine.put("scriptName", JS_TEST_NAME);
            scriptEngine.eval("load({ script: script, name: scriptName })");
            System.gc();
            if (i % 100 == 0) {
              System.out.println(Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory());
            }
          }
        }
      }

      ---------- END SOURCE ----------

      FREQUENCY : always


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            • Assignee:
              Unassigned
              Reporter:
              webbuggrp Webbug Group
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              • Created:
                Updated: