JTReg Test Failure: java/lang/invoke/ExplicitCastArgumentsTest.java

[M-Davies]

Failure link

• Test https://github.com/ibmruntimes/openj9-openjdk-jdk11/blob/openj9/test/jdk/java/lang/invoke/ExplicitCastArgumentsTest.java is consistantly failing for JDK8 and JDK11 OpenJ9 (hotspot is unaffected).
• test category, openjdk
• OS/architecture, openjdk_x86-64_linux, openjdk_x86-64_windows

OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.4+11-201908171810)
11:43:12  Eclipse OpenJ9 VM AdoptOpenJDK (build master-9d2933acc, JRE 11 Linux amd64-64-Bit Compressed References 20190817_311 (JIT enabled, AOT enabled)
11:43:12  OpenJ9   - 9d2933acc
11:43:12  OMR      - 6e99760b
11:43:12  JCL      - 965d0c0df3 based on jdk-11.0.4+11)

Optional info

• intermittent failure (no)
• Part of Investigate JTreg tests failing against Openj9 Java 11 builds adoptium/aqa-tests#585

Failure output (captured from console output)

STDERR:
11:44:56  java.lang.AssertionError: Unexpected exception was thrown while testing return value conversion: class java.lang.Boolean => boolean; parameter: null
11:44:56  	at ExplicitCastArgumentsTest.testConversion(ExplicitCastArgumentsTest.java:609)
11:44:56  	at ExplicitCastArgumentsTest.testNullRef2Prim(ExplicitCastArgumentsTest.java:124)
11:44:56  	at ExplicitCastArgumentsTest.main(ExplicitCastArgumentsTest.java:71)
11:44:56  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
11:44:56  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
11:44:56  	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
11:44:56  	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
11:44:56  	at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
11:44:56  	at java.base/java.lang.Thread.run(Thread.java:831)
11:44:56  Caused by: java.lang.NullPointerException
11:44:56  	at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:521)
11:44:56  	at ExplicitCastArgumentsTest.testConversion(ExplicitCastArgumentsTest.java:563)
11:44:56  	... 8 more
11:44:56  
11:44:56  JavaTest Message: Test threw exception: java.lang.AssertionError
11:44:56  JavaTest Message: shutting down test
11:44:56  
11:44:56  STDOUT:
11:44:56  -Dseed=-8301395383398379035
11:44:56  -DtestLimit=2000
11:44:56  
11:44:56  TEST RESULT: Failed. Execution failed: `main' threw exception: java.lang.AssertionError: Unexpected exception was thrown while testing return value conversion: class java.lang.Boolean => boolean; parameter: null

[M-Davies]

2nd fail on testPrim2Ref(). All other tests pass

java.lang.AssertionError: Unexpected exception was thrown while testing return value conversion: boolean => class java.lang.Number; parameter: true
	at ExplicitCastArgumentsTest.testConversion(ExplicitCastArgumentsTest.java:609)
	at ExplicitCastArgumentsTest.testPrim2Ref(ExplicitCastArgumentsTest.java:182)
	at ExplicitCastArgumentsTest.main(ExplicitCastArgumentsTest.java:73)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.invoke.WrongMethodTypeException
	at java.base/java.lang.invoke.ConvertHandle$FilterHelpers.getBoxingReturnFilter(ConvertHandle.java:241)
	at java.base/java.lang.invoke.ConvertHandle$FilterHelpers.getReturnFilter(ConvertHandle.java:154)
	at java.base/java.lang.invoke.MethodHandles.explicitCastArguments(MethodHandles.java:3015)
	at ExplicitCastArgumentsTest.testConversion(ExplicitCastArgumentsTest.java:559)
	... 8 more

[M-Davies]

The test fails due to a difference in the openj9 implementation of Number and Boolean. NullPointerException when attempting to find the Boolean class and WrongMethodTypeException when trying to convert a Boolean to Number. Since both are calling the same target MethodHandle, this is likely a hotspot specific test, openj9 doesn't utilise the same classes as hotspot and would explain why the method handle can't find a couple of classes.