tomcat是8.0.50版本
以下是web工程的lib目录
报错信息:
15-Sep-2021 16:02:08.844 信息 [http-apr-8080-exec-8] com.alibaba.druid.support.logging.JakartaCommonsLoggingImpl.info {dataSource-1} inited
15-Sep-2021 16:05:47.220 警告 [RMI TCP Connection(8)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [book] registered the JDBC driver [com.alibaba.druid.proxy.DruidDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
15-Sep-2021 16:05:47.220 警告 [RMI TCP Connection(8)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [book] 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.
15-Sep-2021 16:05:47.220 警告 [RMI TCP Connection(8)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [book] 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.base@12.0.2/java.lang.Object.wait(Native Method)
java.base@12.0.2/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:91)
java.base@12.0.2/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.base@12.0.2/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
java.base@12.0.2/java.lang.Thread.run(Thread.java:835)
15-Sep-2021 16:05:47.220 警告 [RMI TCP Connection(8)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [book] appears to have started a thread named [Druid-ConnectionPool-Create-1868927692] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.base@12.0.2/jdk.internal.misc.Unsafe.park(Native Method)
java.base@12.0.2/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
java.base@12.0.2/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2441)
15-Sep-2021 16:05:47.228 警告 [RMI TCP Connection(8)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [book] appears to have started a thread named [Druid-ConnectionPool-Destroy-1868927692] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.base@12.0.2/java.lang.Thread.sleep(Native Method)
com.alibaba.druid.pool.DruidDataSource$DestroyConnectionThread.run(DruidDataSource.java:2538)
15-Sep-2021 16:05:47.453 信息 [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading 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:1355)
at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1025)
at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:123)
at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:90)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:835)
