在运行 tomcat 时获取以下错误日志：-
May 12, 2023 9:45:04 AM org.apache.naming.NamingContext lookup
WARNING: Unexpected exception resolving reference
java.sql.SQLException: Unable to load class: com.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@34c45dca;ClassLoader:ParallelWebappClassLoader
context: Image-Text
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@34c45dca
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:315)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:227)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:768)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:696)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:495)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:153)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:107)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:560)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:244)
at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:96)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:332)
at org.apache.naming.NamingContext.lookup(NamingContext.java:864)
at org.apache.naming.NamingContext.lookup(NamingContext.java:158)
at org.apache.naming.NamingContext.lookup(NamingContext.java:850)
at org.apache.naming.NamingContext.lookup(NamingContext.java:172)
at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:986)
at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:536)
at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:243)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4852)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:683)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:658)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:662)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1184)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1932)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1094)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:476)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1617)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:318)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:898)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:795)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1332)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1322)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:871)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:249)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:428)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:917)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:347)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:478)
Caused by: java.lang.ClassNotFoundException: Unable to load class: com.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@34c45dca;ClassLoader:ParallelWebappClassLoader
context: Image-Text
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@34c45dca
at org.apache.tomcat.jdbc.pool.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:56)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:304)
... 59 more
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1412)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.tomcat.jdbc.pool.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:38)
... 60 more
May 12, 2023 9:45:04 AM org.apache.catalina.core.NamingContextListener addResource
WARNING: Failed to register in JMX: [javax.naming.NamingException: Unexpected exception resolving reference [Root exception is java.sql.SQLException: Unable to load class: com.mysql.jdbc.Driver from ClassLoader:java.net.URLClassLoader@34c45dca;ClassLoader:ParallelWebappClassLoader
context: Image-Text
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@34c45dca
]]
May 12, 2023 9:45:04 AM org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet [Faces Servlet] as unavailable
May 12, 2023 9:45:04 AM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet [Faces Servlet] in web application [/Image-Text] threw load() exception
java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1412)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:487)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:469)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:141)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1020)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:960)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4673)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4980)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:683)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:658)
mysql 依赖使用：-
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<version>8.0.31</version>
</dependency>
我正在使用 tomcat 9.0.74 和 mysql 8.0.31 和 jdk8，我目前正在将我的项目从 jdk7 升级到 8，将 tomcat 7 升级到 9，将 mysql 5 升级到 8。有很多问题，其中大部分通过更改解决了依赖版本，但这我无法解决。 我尝试更改 mysql 版本但没有用
添加更多错误日志这些日志是由于某些 eclipse 设置而丢失的起始日志：-
May 12, 2023 10:34:43 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class [org.springframework.web.util.Log4jConfigListener]
java.lang.ClassNotFoundException: org.springframework.web.util.Log4jConfigListener
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1412)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:487)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:469)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:141)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4421)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4946)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:683)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:658)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:662)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:689)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1888)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:582)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:472)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1617)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:318)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:898)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:795)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1332)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1322)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:871)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:249)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:428)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:917)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:347)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:478)
May 12, 2023 10:34:43 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
May 12, 2023 10:34:43 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: One or more listeners failed to start. Full details will be found in the appropriate container log file
May 12, 2023 10:34:43 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [] startup failed due to previous errors
May 12, 2023 10:34:44 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
WARNING: The web application [ROOT] registered the JDBC driver [com.mysql.cj.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
May 12, 2023 10:34:44 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
WARNING: The web application [ROOT] appears to have started a thread named [mysql-cj-abandoned-connection-cleanup] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:91)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
May 12, 2023 10:34:44 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
WARNING: The web application [ROOT] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.util.TimerThread.mainLoop(Timer.java:526)
java.util.TimerThread.run(Timer.java:505)
May 12, 2023 10:34:44 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deployment of deployment descriptor [D:\apache-tomcat-9.0.74\apache-tomcat-9.0.74\conf\Catalina\localhost\ROOT.xml] has finished in [13,985] ms
May 12, 2023 10:34:44 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive [D:\apache-tomcat-9.0.74\apache-tomcat-9.0.74\webapps\abc.war]
May 12, 2023 10:34:46 AM org.apache.catalina.loader.WebappClassLoaderBase checkStateForResourceLoading
INFO: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1432)
at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1057)
at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:123)
at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:90)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)