[YARN-9512] [JDK11] TestAuxServices#testCustomizedAuxServiceClassPath fails because of ClassCastException.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Component/s: test
• Target Version/s: 3.3.0
• Assignee: Akira Ajisaka
• Reporter: Siyao Meng
• Created: 25/Apr/19 15:48
• Updated: 16/Jan/20 03:35
• Resolved: 16/Jan/20 03:22

Description

Found in maven JDK 11 unit test run. Compiled on JDK 8:

[ERROR] testCustomizedAuxServiceClassPath(org.apache.hadoop.yarn.server.nodemanager.containermanager.TestAuxServices)  Time elapsed: 0.019 s  <<< ERROR!java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.TestAuxServices$ServiceC.getMetaData(TestAuxServices.java:197)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices.serviceStart(AuxServices.java:315)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.TestAuxServices.testCustomizedAuxServiceClassPath(TestAuxServices.java:344)
        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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)

Issue Links

• is a child of: HADOOP-16264 [JDK11] Track failing Hadoop unit tests
• is related to: YARN-9813 RM does not start on JDK11 when UIv2 is enabled
• links to: GitHub Pull Request #1806