Log4J：关闭钩子上的FATAL异常，无法弄清楚原因

Question

我只是将log4j集成到我的应用程序中，并且我设置了AspectJ以使用log4j并最终将所有日志记录从我的主代码中传出。因此，简而言之，我设置了执行日志条目的方面，然后在短时间内运行我的程序来测试它们。

通常，在这些短期内，我得到以下异常：

2015-09-28 15:21:48,222 Thread-4 FATAL Unable to register shutdown hook because JVM is shutting down. java.lang.IllegalStateException: Cannot add new shutdown hook as this is not started. Current state: STOPPED
at org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry.addShutdownCallback(DefaultShutdownCallbackRegistry.java:113)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.addShutdownCallback(Log4jContextFactory.java:271)
at org.apache.logging.log4j.core.LoggerContext.setUpShutdownHook(LoggerContext.java:240)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:201)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:233)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:41)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:162)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:507)
at org.jboss.logging.Log4j2Logger.<init>(Log4j2Logger.java:36)
at org.jboss.logging.Log4j2LoggerProvider.getLogger(Log4j2LoggerProvider.java:30)
at org.jboss.logging.Log4j2LoggerProvider.getLogger(Log4j2LoggerProvider.java:26)
at org.jboss.logging.Logger.getLogger(Logger.java:2465)
at org.jboss.logging.Logger$1.run(Logger.java:2565)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.logging.Logger.getMessageLogger(Logger.java:2529)
at org.jboss.logging.Logger.getMessageLogger(Logger.java:2516)
at org.hibernate.internal.CoreLogging.messageLogger(CoreLogging.java:28)
at org.hibernate.internal.CoreLogging.messageLogger(CoreLogging.java:24)
at org.hibernate.event.internal.ReattachVisitor.<clinit>(ReattachVisitor.java:27)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:293)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:227)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:92)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:647)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:639)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:634)
at io.craigmiller160.stockmarket.controller.HibernatePortfolioDAO.savePortfolio(HibernatePortfolioDAO.java:225)
at io.craigmiller160.stockmarket.controller.StockMarketController.savePortfolio(StockMarketController.java:1441)
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:497)
at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:353)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:276)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:925)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:932)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:997)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:973)
at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:893)

有时候，但并非总是如此，此异常的前面是：

2015-09-28 15:21:48,152 Thread-4 ERROR An exception occurred processing Appender asyncAppender java.lang.IllegalStateException: AsyncAppender asyncAppender is not active
at org.apache.logging.log4j.core.appender.AsyncAppender.append(AsyncAppender.java:136)
at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:148)
at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:121)
at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:112)
at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:80)
at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:390)
at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:378)
at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:362)
at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:352)
at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:59)
at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:138)
at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:999)
at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:954)
at org.apache.logging.log4j.jcl.Log4jLog.debug(Log4jLog.java:81)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:142)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:155)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:120)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:382)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:112)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:230)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:237)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:213)
at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:52)
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1443)
at io.craigmiller160.stockmarket.controller.HibernatePortfolioDAO.savePortfolio(HibernatePortfolioDAO.java:224)
at io.craigmiller160.stockmarket.controller.StockMarketController.savePortfolio(StockMarketController.java:1441)
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:497)
at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:353)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:276)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:925)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:932)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:997)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:973)
at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:893)

如果您需要查看其他任何内容以确定原因，请与我们联系。它并不总是会发生，但当程序运行10-20秒时，它会经常发生。我只是不明白为什么会这样。

Answer 1

Log4j2尝试使用shutdown hook正确关闭日志记录服务。

关闭挂钩是并行执行的，这就是异常不系统的原因。

有关此问题的bug report。

您可以在配置文件中禁用shutdown hook：

<configuration shutdownHook="disable" ...>

Answer 2

另请参阅log4j2页面上的此链接：

https://logging.apache.org/log4j/2.x/manual/webapp.html

如果包含此依赖项，则不会尝试添加关闭挂钩。

<dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-web</artifactId>
        <version>${log4j.version}</version>
 </dependency>

Answer 3

如前所述log4j-web是这个问题的罐子。它对jetty-9.2.1.v20140609没有任何问题。

libraryDependencies += "org.apache.logging.log4j" % "log4j-web" % "2.5"

如果您选中log4j-web (upto v2.9)，则会log4j.shutdownHookEnabled=false

但是对于Servlet 3.0和Tomcat 7.0.73，必须从jarsToSkip的{​​{1}}键中删除log4j。

奇怪的事情可能会发生。至于我，我正在部署两个conf/catalina.properties，两个都使用.war，为一项服务工作但不为另一项服务。 Non blocking Logger / Tomcat 7重新开始清理它。

Using Log4j 2 in Web Applications -

中描述了需要Websphere 8的原因

  

当clean up logging resource关闭或取消部署网络应用时，   记录资源以便正确清理非常重要   （数据库连接关闭，文件关闭等）。

     

由于Web应用程序中Servlet Container的性质，Log4j资源不可能   通过正常手段清理。 Log4j必须在网络上“启动”   当Web应用程序取消部署时，app会部署并“关闭”。

请阅读此official doc - Using Log4j 2 in Web Containers，这是有帮助的。

Answer 4

这是一个已知问题。 Log4j现在将在关机期间使用SimpleLogger。请参阅https://issues.apache.org/jira/browse/LOG4J2-1222。