[FLINK-11155] HadoopFreeFsFactoryTest fails with ClassCastException

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 1.9.0
• Component/s: FileSystems, Tests
• Labels: pull-request-available
• Assignee: Chesnay Schepler
• Reporter: Gary Yao
• Created: 13/Dec/18 15:06
• Updated: 03/Apr/19 09:28
• Resolved: 03/Apr/19 09:28

Description

HadoopFreeFsFactoryTest#testHadoopFactoryInstantiationWithoutHadoop fails with a ClassCastException because we try to cast the result of getClassLoader to URLClassLoader (also see https://stackoverflow.com/questions/46694600/java-9-compatability-issue-with-classloader-getsystemclassloader)

java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader

	at org.apache.flink.runtime.fs.hdfs.HadoopFreeFsFactoryTest.testHadoopFactoryInstantiationWithoutHadoop(HadoopFreeFsFactoryTest.java:46)
	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:564)

One should also look for other instances where we cast to URLClassLoader.

Issue Links

• links to: GitHub Pull Request #8040