smengcl opened a new pull request #303: HDDS-2666. Suppress loader constraint violation message
in TestOzoneFileSystemWithMocks
URL: https://github.com/apache/hadoop-ozone/pull/303
## What changes were proposed in this pull request?
Suppress loader constraint violation error message in `TestOzoneFileSystemWithMocks`:
```
ERROR StatusLogger 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:756)
at org.powermock.core.classloader.MockClassLoader.loadUnmockedClass(MockClassLoader.java:250)
at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:194)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:71)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
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)
...
```
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-2666
## How was this patch tested?
Run TestOzoneFileSystemWithMocks. Should no longer print `java.lang.LinkageError: loader
constraint violation`.
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