NullPointerException while Running Humble Benchmarks with JDK 11 Hotspot

[piyush286]

Problem Description

Running Humble benchmarks with JDK 11 Hotspot gives NullPointerException as shown below. This benchmark works with JDK 8 Hotpot and JDK 11 and 8 OpenJ9.

I'm trying to add BumbleBench targets for testing at Adopt as part of adoptium/aqa-tests#1379.

Error

15:46:53  Exception in thread "main" java.lang.RuntimeException: java.lang.NullPointerException
15:46:53  	at net.adoptopenjdk.bumblebench.core.Util.freshlyLoadedClass(Util.java:185)
15:46:53  	at net.adoptopenjdk.bumblebench.core.Util.newInstanceOfPossiblyFreshlyLoadedClass(Util.java:221)
15:46:53  	at net.adoptopenjdk.bumblebench.core.Util.newInstanceOfFreshlyLoadedClass(Util.java:208)
15:46:53  	at net.adoptopenjdk.bumblebench.core.HumbleBench$DelayThread.<init>(HumbleBench.java:134)
15:46:53  	at net.adoptopenjdk.bumblebench.core.HumbleBench.<init>(HumbleBench.java:57)
15:46:53  	at net.adoptopenjdk.bumblebench.humble.DistinctStringsEqualsBench.<init>(DistinctStringsEqualsBench.java:35)
15:46:53  	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
15:46:53  	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
15:46:53  	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
15:46:53  	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
15:46:53  	at java.base/java.lang.Class.newInstance(Class.java:584)
15:46:53  	at net.adoptopenjdk.bumblebench.core.Launcher.main(Launcher.java:55)
15:46:53  Caused by: java.lang.NullPointerException
15:46:53  	at java.base/java.lang.reflect.Method.invoke(Method.java:559)
15:46:53  	at net.adoptopenjdk.bumblebench.core.Util.readFully(Util.java:194)
15:46:53  	at net.adoptopenjdk.bumblebench.core.Util.freshlyLoadedClass(Util.java:182)
15:46:53  	... 11 more
15:46:53  
15:46:53  bumbleBench-DistinctStringsEqualsBench_0_FAILED

To Reproduce

1. Remove the implementation constraint for the tests such as DistinctStringsEqualsBench (https://github.com/AdoptOpenJDK/openjdk-tests/blob/master/perf/bumbleBench/playlist.xml)
2. Use the bumbleBench-DistinctStringsEqualsBench target on TestKitGen with the relevant SDK