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From Kirk Lund <kl...@apache.org>
Subject PowerMock unit test errors
Date Tue, 06 Nov 2018 18:40:52 GMT
I think we should try really hard to avoid using PowerMock. If you have
some code that you need to use PowerMock to make it testable, please
consider refactoring the code to a) avoid statics, b) pass all dependencies
in via the constructor.

The following was spit out by one of my unit test runs. None of the logging
or log4j tests in my PR involve PowerMock. Also, this unit test run had no
FAILED tests, so this would appear to be generated by some unit test that
uses PowerMock and PASSED.

> Task :geode-core:test
2018-11-06 18:03:49,443 Distributed system shutdown hook ERROR Could not
reconfigure JMX java.lang.LinkageError: loader constraint violation: loader
(instance of org/powermock/core/classloader/MockClassLoader) previously
initiated loading for a different type with name
"javax/management/MBeanServer"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at
org.powermock.core.classloader.MockClassLoader.loadUnmockedClass(MockClassLoader.java:262)
at
org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:206)
at
org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)
at
org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at
org.apache.logging.log4j.core.jmx.Server.unregisterAllMatching(Server.java:335)
at
org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:259)
at
org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:164)
at
org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:140)
at
org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:558)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:619)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:636)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:231)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:243)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:174)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:661)
at
org.apache.geode.internal.logging.LogService.getLogger(LogService.java:64)
at
org.apache.geode.internal.tcp.ConnectionTable.<clinit>(ConnectionTable.java:61)
at
org.apache.geode.distributed.DistributedSystem.setThreadsSocketPolicy(DistributedSystem.java:263)
at
org.apache.geode.distributed.internal.InternalDistributedSystem.lambda$static$0(InternalDistributedSystem.java:2320)
at java.lang.Thread.run(Thread.java:748)

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