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Gary Gregory commented on LOG4J2-2304: -------------------------------------- As an aside it looks like {{com.caucho.jmx.AbstractMBeanServer.queryNames()}} might be returning {{null}} instead of an empty set. > Log4j2 2.8.2 JMX unregister NullPointerException > ------------------------------------------------ > > Key: LOG4J2-2304 > URL: https://issues.apache.org/jira/browse/LOG4J2-2304 > Project: Log4j 2 > Issue Type: Bug > Components: Configurators > Affects Versions: 2.8.2 > Reporter: wumengsheng > Priority: Major > > 2018-04-04 14:07:07,545 pool-2-thread-1 ERROR Could not unregister MBeans for > org.apache.logging.log4j2:type=Default java.lang.NullPointerException > at > org.apache.logging.log4j.core.jmx.Server.unregisterAllMatching(Server.java:336) > at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:259) > at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:247) > at org.apache.logging.log4j.core.LoggerContext.stop(LoggerContext.java:338) > at org.apache.logging.log4j.core.LoggerContext$1.run(LoggerContext.java:279) > at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry$RegisteredCancellable.run(DefaultShutdownCallbackRegistry.java:109) > at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry.run(DefaultShutdownCallbackRegistry.java:74) > at java.lang.Thread.run(Thread.java:745) > 2018-04-04 14:07:07,548 pool-2-thread-1 ERROR Could not unregister MBeans for > org.apache.logging.log4j2:type=Default,component=StatusLogger > java.lang.NullPointerException > at > org.apache.logging.log4j.core.jmx.Server.unregisterAllMatching(Server.java:336) > at > org.apache.logging.log4j.core.jmx.Server.unregisterStatusLogger(Server.java:288) > at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:262) > at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:247) > at org.apache.logging.log4j.core.LoggerContext.stop(LoggerContext.java:338) > at org.apache.logging.log4j.core.LoggerContext$1.run(LoggerContext.java:279) > at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry$RegisteredCancellable.run(DefaultShutdownCallbackRegistry.java:109) > at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry.run(DefaultShutdownCallbackRegistry.java:74) > at java.lang.Thread.run(Thread.java:745) > > > [2018/04/04 14:07:07.534] WARNING com.caucho.jmx.AbstractMBeanServer > java.lang.IllegalStateException: JMX context > EnvironmentClassLoader[web-app:http://localhost:8001] has been closed. > [2018/04/04 14:07:07.534] at > com.caucho.jmx.EnvironmentMBeanServer.createContext(EnvironmentMBeanServer.java:101) > [2018/04/04 14:07:07.534] at > com.caucho.jmx.GlobalMBeanServer.createContext(GlobalMBeanServer.java:77) > [2018/04/04 14:07:07.534] at > com.caucho.jmx.AbstractMBeanServer.createContext(AbstractMBeanServer.java:77) > [2018/04/04 14:07:07.534] at > com.caucho.jmx.GlobalMBeanServer.getView(GlobalMBeanServer.java:115) > [2018/04/04 14:07:07.534] at > com.caucho.jmx.AbstractMBeanServer.queryNames(AbstractMBeanServer.java:551) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.jmx.Server.unregisterAllMatching(Server.java:335) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:259) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.jmx.Server.unregisterLoggerContext(Server.java:247) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.LoggerContext.stop(LoggerContext.java:338) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.LoggerContext$1.run(LoggerContext.java:279) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry$RegisteredCancellable.run(DefaultShutdownCallbackRegistry.java:109) > [2018/04/04 14:07:07.534] at > org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry.run(DefaultShutdownCallbackRegistry.java:74) > [2018/04/04 14:07:07.534] at java.lang.Thread.run(Thread.java:745) > [2018/04/04 14:07:07.534] -- This message was sent by Atlassian JIRA (v7.6.3#76005)