警告: The web application [bank] 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. 一月 08, 2019 5:58:16 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc 警告: The web application [bank] registered the JDBC driver [com.mysql.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. 一月 08, 2019 5:58:16 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads 警告: The web application [bank] appears to have started a thread named [Abandoned connection cleanup thread] 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:143) com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:64) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:617)java.lang.Thread.run(Thread.java:745)一月08,20195:58:16下午org.apache.catalina.loader.WebappClassLoaderBasecheckStateForResourceLoading信息:Illegalaccess:thiswebapplicationinstancehasbeenstoppedalready.Couldnotload[].Thefollowingstacktraceisthrownfordebuggingpurposesaswellastoattempttoterminatethethreadwhichcausedtheillegalaccess.java.lang.IllegalStateException:Illegalaccess:thiswebapplicationinstancehasbeenstoppedalready.Couldnotload[].Thefollowingstacktraceisthrownfordebuggingpurposesaswellastoattempttoterminatethethreadwhichcausedtheillegalaccess.atorg.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1295)atorg.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:972)atcom.mysql.jdbc.AbandonedConnectionCleanupThread.checkContextClassLoaders(AbandonedConnectionCleanupThread.java:90)atcom.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:63)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)atjava.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)