TinkerPop Test suite compatibility issues with JDK 18

[Martin Häusler]

Hello,

I'm maintaining a TinkerPop 3.x graph implementation. I'd like to upgrade my project to Java 18. When I try to run the test suites provided by TinkerPop (both the structure and the process test suite), I get the following stacktrace:

java.lang.IllegalArgumentException: Unable to create serializer "org.apache.tinkerpop.shaded.kryo.serializers.FieldSerializer" for class: java.util.concurrent.atomic.AtomicLong
    at org.apache.tinkerpop.shaded.kryo.factories.ReflectionSerializerFactory.makeSerializer(ReflectionSerializerFactory.java:67)
    at org.apache.tinkerpop.shaded.kryo.factories.ReflectionSerializerFactory.makeSerializer(ReflectionSerializerFactory.java:45)
    at org.apache.tinkerpop.shaded.kryo.Kryo.newDefaultSerializer(Kryo.java:380)
    at org.apache.tinkerpop.shaded.kryo.Kryo.getDefaultSerializer(Kryo.java:364)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoTypeReg.registerWith(GryoTypeReg.java:122)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoMapper.createMapper(GryoMapper.java:101)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoMapper.createMapper(GryoMapper.java:75)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoReader.<init>(GryoReader.java:71)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoReader.<init>(GryoReader.java:64)
    at org.apache.tinkerpop.gremlin.structure.io.gryo.GryoReader$Builder.create(GryoReader.java:302)
    at org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.IoStep.constructReader(IoStep.java:156)
    at org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.IoStep.read(IoStep.java:132)
    at org.apache.tinkerpop.gremlin.process.traversal.step.sideEffect.IoStep.processNextStart(IoStep.java:110)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:150)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.ExpandableStepIterator.next(ExpandableStepIterator.java:55)
    at org.apache.tinkerpop.gremlin.process.traversal.step.filter.FilterStep.processNextStart(FilterStep.java:40)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:135)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:40)
    at org.apache.tinkerpop.gremlin.process.traversal.Traversal.iterate(Traversal.java:210)
    at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal.iterate(GraphTraversal.java:3333)
    at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal$Admin.iterate(GraphTraversal.java:202)
    at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal.iterate(DefaultGraphTraversal.java:48)
    at org.apache.tinkerpop.gremlin.AbstractGraphProvider.readIntoGraph(AbstractGraphProvider.java:153)
    at org.apache.tinkerpop.gremlin.AbstractGraphProvider.loadGraphData(AbstractGraphProvider.java:93)
    at org.apache.tinkerpop.gremlin.GraphManager$ManagedGraphProvider.loadGraphData(GraphManager.java:168)
    at org.apache.tinkerpop.gremlin.AbstractGremlinTest.setup(AbstractGremlinTest.java:116)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    at org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at org.junit.runners.Suite.runChild(Suite.java:128)
    at org.apache.tinkerpop.gremlin.AbstractGremlinSuite.runChild(AbstractGremlinSuite.java:226)
    at org.apache.tinkerpop.gremlin.AbstractGremlinSuite.runChild(AbstractGremlinSuite.java:51)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.apache.tinkerpop.gremlin.AbstractGremlinSuite$1.evaluate(AbstractGremlinSuite.java:235)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
    at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.lang.reflect.InvocationTargetException
    at jdk.internal.reflect.GeneratedConstructorAccessor30.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
    at org.apache.tinkerpop.shaded.kryo.factories.ReflectionSerializerFactory.makeSerializer(ReflectionSerializerFactory.java:54)
    ... 66 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private volatile long java.util.concurrent.atomic.AtomicLong.value accessible: module java.base does not "opens java.util.concurrent.atomic" to unnamed module @27fa135a
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
    at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
    at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
    at org.apache.tinkerpop.shaded.kryo.serializers.FieldSerializer.buildValidFields(FieldSerializer.java:306)
    at org.apache.tinkerpop.shaded.kryo.serializers.FieldSerializer.rebuildCachedFields(FieldSerializer.java:239)
    at org.apache.tinkerpop.shaded.kryo.serializers.FieldSerializer.rebuildCachedFields(FieldSerializer.java:182)
    at org.apache.tinkerpop.shaded.kryo.serializers.FieldSerializer.<init>(FieldSerializer.java:155)
    ... 71 more

Judging by the root cause:

java.lang.reflect.InaccessibleObjectException: Unable to make field private volatile long java.util.concurrent.atomic.AtomicLong.value accessible: module java.base does not "opens java.util.concurrent.atomic" to unnamed module @27fa135a

... this looks like a Java Module System issue to me. Is there any fix for that? I'm using TinkerPop 3.6.1.

Any clue what I'm doing wrong? The test suite was working just fine under JDK 8.

Thanks!

[Stephen Mallette]

TinkerPop can't build on anything past JDK11. There are a number of blockers to allowing JDK17 to work:

https://issues.apache.org/jira/browse/TINKERPOP-2703

You can see one of the blockers relates to the issue you are running into with Kryo/JDK17. Please watch that issue for updates on progress.

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