horizonzy opened a new issue #2647:
URL: https://github.com/apache/rocketmq/issues/2647
**BUG REPORT**
1. Please describe the issue you observed:
when package client-module, will throw exception as followed:
```
ERROR StatusLogger Could not reconfigure JMX
java.lang.LinkageError: loader constraint violation: loader (instance of
org/powermock/core/classloader/javassist/JavassistMockClassLoader) 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.javassist.JavassistMockClassLoader.loadUnmockedClass(JavassistMockClassLoader.java:90)
at
org.powermock.core.classloader.MockClassLoader.loadClassByThisClassLoader(MockClassLoader.java:104)
at
org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:147)
at
org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:98)
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:541)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:603)
at
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:620)
at
org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:226)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
at
org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
at
org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:103)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:43)
at
org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:42)
at
org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:277)
at
io.netty.util.internal.logging.Slf4JLoggerFactory.newInstance(Slf4JLoggerFactory.java:73)
at
io.netty.util.internal.logging.InternalLoggerFactory.newDefaultFactory(InternalLoggerFactory.java:42)
at
io.netty.util.internal.logging.InternalLoggerFactory.<clinit>(InternalLoggerFactory.java:34)
at
org.apache.rocketmq.remoting.netty.NettyLogger.initNettyLogger(NettyLogger.java:36)
at
org.apache.rocketmq.remoting.netty.NettyRemotingAbstract.<clinit>(NettyRemotingAbstract.java:107)
at
org.apache.rocketmq.client.impl.MQClientAPIImpl.<init>(MQClientAPIImpl.java:188)
at
org.apache.rocketmq.client.impl.factory.MQClientInstance.<init>(MQClientInstance.java:133)
at
org.apache.rocketmq.client.impl.MQClientManager.getOrCreateMQClientInstance(MQClientManager.java:53)
at
org.apache.rocketmq.client.impl.consumer.DefaultMQPushConsumerImpl.start(DefaultMQPushConsumerImpl.java:582)
at
org.apache.rocketmq.client.consumer.DefaultMQPushConsumer.start(DefaultMQPushConsumer.java:698)
at
org.apache.rocketmq.client.consumer.DefaultMQPushConsumerTest.init(DefaultMQPushConsumerTest.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.junit.internal.runners.MethodRoadie.runBefores(MethodRoadie.java:132)
at
org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:95)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:298)
at
org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:218)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:160)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:134)
at
org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33)
at
org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)
at
org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:136)
at
org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:117)
at
org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)
at
org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161)
at
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121)
```
It's showed that the class `javax/management/MBeanServer` already be load
before JavassistMockClassLoader.load.
For this case, should ignore load `javax/management/MBeanServer` class when
mock.
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